Publications

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2019

Ferroelectric Films on Metal Substrates: The Role of Thermal Expansion Mismatch on Dielectric, Piezoelectric, and Pyroelectric properties
T. A. Patel, K. Co, R. J. Hebert, and S. P. Alpay, J. Appl. Phys. 126, 134103 (2019)
DOI: https://doi.org/10.1063/1.5116134

Towards Magnetic Alumina: Uncovering the Roles of Transition Metal Doping and Electron Hybridization in Spin Delocalization
Nykwest E C and Alpay S P, J. Phys. Condens. Matter 31 245801 (2019)
DOI: 10.1088/1361-648X/ab0fe4

Electronic and Magnetic Properties of Lanthanum and Strontium Doped Bismuth Ferrite: A First-Principles Study
A. Ghosh, D. P. Trujillo, H. Choi, S. M. Nakhmanson, S. P. Alpay, and J.-X Zhu, Scientific Reports 9, 194 (2019).
DOI: https://doi.org/10.1038/s41598-018-37339-3

Polarization Rotation in Bi4Ti3O12 by Isovalent Doping at the Fluorite Sublattice
K. Co, F.-C. Sun, S. P. Alpay, and S. K. Nayak, Phys Rev. B. 99, 014101 (2019).
DOI: https://doi.org/10.1103/PhysRevB.99.014101

Atomistic Origins of Guinier-Preston Zone Formation and Morphology in Al-Cu and Al-Ag Alloys from First Principles
S. K. Nayak, C. Hung, R. J. Hebert, and S. P. Alpay, Scripta Materialia 162, 235 (2019).
DOI: https://doi.org/10.1016/j.scriptamat.2018.11.031

2018

Magnetic and Energetic Properties of Transition Metal Doped Alumina
E. C. Nykwest, B. C. Rinderspacher, J. M. Elward, R. E. Brennan, and K. R. Limmer, J. Phys.:Condens. Matter 30, 395801 (2018).
DOI: https://doi.org/10.1088/1361-648X/aada2a

Electromechanical Control of Polarization Vortex Ordering in an Interacting Ferroelectric-Dielectric Composite Dimer
J. Mangeri, S. P. Alpay, S. Nakhmanson, and O. G. Heinonen,  Appl. Phys. Lett. 113, 092901 (2018).
DOI: https://doi.org/10.1063/1.5046080

Graphene Supported Single Atom Transition Metal Catalysts for Methane ActivationGraphene Supported Single Atom Transition Metal Catalysts for Methane Activation
S. Sahoo, S. L. Suib, and S. P. Alpay, ChemCatChem 10, 3229 (2018) – front cover.
DOI: https://doi.org/10.1002/cctc.201800465

Metastable vortex-like polarization textures in ferroelectric nanoparticles of different shapes and sizes
K.C. Pitike, J. Mangeri, H. Whitlock, T. Patel, P. Dyer, S. P. Alpay, and S. M. Nakhmanson, J. Appl. Phys. 124, 064104 (2018) – highlighted as Editor’s Pick.
DOI: https://doi.org/10.1063/1.5037163

Dielectric Properties and Resistive Switching Characteristics of Lead Zirconate Titanate/Hafnia Heterostructures
Y. Espinal, S. P. Alpay, M. Howard, and B. Hanrahan, J. Appl. Phys. 124, 064103 (2018).
DOI: https://doi.org/10.1063/1.5037999

Mesoporous Cobalt/Manganese Oxide: A Highly Selective Bifunctional Catalyst for Amine–Imine Transformations
B. Dutta, S. March, L. Achola, S. Sahoo, J. He, A. S. Amin, Y. Wu, S. Poges, S. P. Alpay, and S. L. Suib, Green Chem. 20, 3180 (2018) – front cover.
DOI: https://doi.org/10.1039/C8GC00862K

Surface Phase Diagrams of Titanium in Oxygen, Nitrogen and Hydrogen Environments: A First Principles Analysis
S. Sahoo, R. J. Hebert, and S. P. Alpay,  Surface Science 677, 18 (2018).
DOI: https://doi.org/10.1016/j.susc.2018.05.007

Accounting for the Various Contributions to Pyroelectricity in Lead Zirconate Titanate Thin Films
B. Hanrahan, Y. Espinal, C. Neville, R. Rudy, M. Rivas, A. Smith, M. T. Kesim, and S. P. Alpay, J. Appl. Phys. 123, 124104 (2018).
DOI: https://doi.org/10.1063/1.5012984

Insight into point defects and impurities in Titanium from first principles
S. K. Nayak, C. J. Hung, V. Sharma, S. P. Alpay, A. M. Dongare, W. J. Brindley, R. J. Hebert, npj Comp. Mater. 4, 11 (2018).
DOI: https://doi.org/10.1038/s41524-018-0068-9

Corrosion, Oxidation, Erosion and Performance of Ag/W-based Circuit Breaker Contacts: A Review
T. Kesim, H. Yu, Y. Sun, M. Aindow, and S. P. Alpay, Corrosion Science 135, 12 (2018).
DOI: https://doi.org/10.1016/j.corsci.2018.02.010

Flexocaloric Response of Epitaxial Ferroelectric Films
H. Khassaf, T. Patel, and S. P. Alpay, J. Appl. Phys. 123, 024102 (2018).
DOI: https://doi.org/10.1063/1.5009121

2017

Soft Phonon Mode Dynamics and Phase Transitions in Aurivillius Type Structures
D. Maurya, F. Sun, D. George, S. K. Nayak, A. Pramanick, M. G. Kang, H. C, Song, A. Charkhesht, S. P. Alpay, G. A. Khodaparast, N. Q. Vinh, and S. Priya, Phys. Rev. B 96, 134114 (2017).
DOI: https://doi.org/10.1103/PhysRevB.96.134114

Mesoporous Iron Sulfide for Highly Efficient Electrocatalytic Hydrogen Evolution
R. Miao, B. Dutta, S. Sahoo, J. He, W. Zhong, S.A. Cetegen, T. Jiang, S.P. Alpay, and S.L. Suib,  J. Am. Chem. Soc. 139, 13604 (2017).
DOI: https://doi.org/10.1021/jacs.7b07044

Combined intrinsic elastocaloric and electrocaloric properties of ferroelectrics
H. Khassaf, T. Patel, and S. P. Alpay, Journal of Applied Physics 121, 144102 (2017).
DOI: https://doi.org/10.1063/1.4980098

Selective CO2 Sorption over Solid Amine Functionalized Mesoporous Polydivinylbenzene Network
T. Jafari, E. Moharreri, P. Toloueinia, A. S. Amin, S. Sahoo, N. Khakpash, I. Noshadi, S. P. Alpay, S. L. Suib, Journal of COUtilization 19, 79 (2017).
DOI: https://doi.org/10.1016/j.jcou.2017.03.004

Reduced Graphene Oxide Supported Nickel-Manganese-Cobalt Spinel Ternary Oxide Nano-composites and Their Chemical-Converted Sulfide Nanocomposites as Efficient Electro-catalysts for Alkaline Water Splitting
R. Miao, J. He, S. Sahoo, Z. Luo, W. Zhong, S-Y. Chen, T. Jafari, B. Dutta, S. Cetegen, M. Wang, S. P. Alpay, and S. L. Suib, ACS Catal. 7, 819 (2017).
DOI: https://doi.org/10.1021/acscatal.6b02650

Microstructural stability, defect structures and deformation mechanisms in a Ag3Sn/Cu3Sn Alloy
Y. Sun, H. Yu, M. T. Kesim, S. P. Alpay, and M. Aindow, J. Mater. Sci. 52, 2944 (2017).
DOI: https://doi.org/10.1007/s10853-016-0590-4

Topological Phase Transformations and Intrinsic Size Effects in Ferroelectric Nanoparticles
J. Mangeri, Y. Espinal, A. M. Jokisaari, S. P. Alpay, S. Nakhmanson, and O. G. Heinonen, Nanoscale 9, 1616 (2017).
DOI: https://doi.org/10.1039/C6NR09111C

Metalorganic Solution Deposition of Lead Zirconate Titanate Films onto an Additively Manufactured Ni-based Superalloy
T. Patel, H. Khassaf, S. Vijayan, N. Bassiri-Gharb, M. Aindow, S. P. Alpay, and R. J. Hebert, Acta Mater. 122, 352 (2017).
DOI: https://doi.org/10.1016/j.actamat.2016.10.009

Compositionally Graded Ferroelectrics as Wide Band Gap Semiconductors: Electrical Domain Structures and the Origin of Low Dielectric Loss
I. B. Misirlioglu and S. P. Alpay, Acta Mater. 122, 266 (2017).
DOI: https://doi.org/10.1016/j.actamat.2016.09.050

2016

Switchable and tunable film bulk acoustic resonator fabricated using barium strontium titanate active layer and Ta2O5/SiO2 acoustic reflector, N. M. Sbrockey, T. S. Kalkur, A. Mansour, H. Khassaf, H. Yu, M. Aindow, S. P. Alpay, and G. S. Tompa, Appl. Phys. Lett. 109, 052902 (2016).
DOI: https://doi.org/10.1063/1.4960361

Amplitudon and phason modes of electrocaloric energy interconversion, John Mangeri, Krishna C Pitike, S Pamir Alpay, and Serge Nakhmanson, npj Computational Materials 2, 16020 (2016).
DOI: https://doi.org/10.1038/npjcompumats.2016.20

Perovskite Ferroelectrics and Relaxor-Ferroelectric Solid Solutions with Large Intrinsic Electrocaloric Response over Broad Temperature Ranges, H. Khassaf, J. V. Mantese, N. Bassiri-Gharb, Z. Kutnjak, and S. P. Alpay, J. Mater. Chem. C 4, 4763 (2016).
DOI: https://doi.org/10.1039/C6TC01107A

Acoustic Detection of Phase Transitions at the NanoscaleAcoustic Detection: Acoustic Detection of Phase Transitions at the Nanoscale, Rama K. Vasudevan, H. Khassaf, Y. Cao, S. Zhang, A. Tselev, B. Carmichael, M. B. Okatan, S. Jesse, L.-Q. Chen, S. P. Alpay, S. V. Kalinin, N. Bassiri-Gharb, Adv. Funct. Mater. 26, 478 (2016).
DOI: https://doi.org/10.1002/adfm.201504407

Electrostatically driven dielectric anomaly in mesoscopic ferroelectriceparaelectric bilayers, H. Khassaf, N. Khakpash, S. Vijayan, M. Aindow, S. P. Alpay, Acta Mater. 105, 74 (2016).
DOI: https://doi.org/10.1016/j.actamat.2015.12.023

Extended Aging of Ag/W Circuit Breaker Contacts: Influence on Surface Structure, Electrical Properties, and UL Testing Performance, H. Yu, M. T. Kesim, Y. Sun, J. Harmon, J. Potter, S. P. Alpay, and M. Aindow, J. Mater. Eng. Perform. 25, 91 (2016).
DOI: https://doi.org/10.1007/s11665-015-1837-y

Are ferroelectric multilayers capacitors in series?, F.-C. Sun, M. T. Kesim, Y. Espinal, S. P. Alpay, J. Mater. Sci. 51, 499 (2016).
DOI: https://doi.org/10.1007/s10853-015-9298-0

Low-voltage ferroelectric–paraelectric superlattices as gate materials for field-effect transistors, I. B. Misirlioglu, C. Sen, M. T. Kesim, S. P. Alpay, J. Mater. Sci. 51, 487, 2016.
DOI: https://doi.org/10.1007/s10853-015-9301-9

2015

A New Method for Achieving Enhanced Dielectric Response Over a Wide Temperature Range
D. Maurya, F.-C. Sun, S. P. Alpay, and S. Priya, Scientific Reports 5, 15144 (2015).
DOI: https://doi.org/10.1038/srep15144

Temperature Dependent Structural, Elastic, and Polar Properties of Ferroelectric Polyvinylidene Fluoride (PVDF) and Trifluoroethylene (TrFE) Copolymers
F.-C. Sun, A. M. Dongare, A. D. Asandei, S. P. Alpay, and S. M. Nakhmanson, J. Mater. Chem. C 3, 8389, (2015).
DOI: https://doi.org/10.1039/C5TC01224D

Facet-dependent Catalytic Activity of MnO Electrocatalysts for Oxygen Reduction and Oxygen Evolution Reactions
Chung-Hao Kuo, Islam M. Mosa, Srinivas Thanneeru, V. Sharma, L. Zhang, S. Biswas, M. Aindow, S. P. Alpay, J. F. Rusling, S. L. Suib, and J. He, Chem. Commun. 51, 5951 (2015).
DOI: https://doi.org/10.1039/C5CC01152C

Misfit Strain Phase Diagrams of Epitaxial PMN–PT Films
N. Khakpash, H. Khassaf, G. A. Rossetti Jr., and S. P. Alpay, Appl. Phys. Lett. 106, 082905 (2015).
DOI: https://doi.org/10.1063/1.4913706

Microstructure Effects in Braze Joints Formed Between Ag/W Electrical Contacts and Sn-Coated Cu using Cu-Ag-P Filler Metal
H. Yu, Y. Sun, S. P. Alpay, and M. Aindow, J. Mater. Sci. 50, 324 (2015).
DOI: https://doi.org/10.1007/s10853-014-8591-7

2014

Next Generation Electrocaloric and Pyroelectric Materials for Solid State Electrothermal Interconversion
S. P. Alpay, J. V. Mantese, S. Trolier-McKinstry, Q. M. Zhang, and R. W. Whatmore, MRS Bulletin 39, 1099 (2014).
DOI: https://doi.org/10.1557/mrs.2014.256

Pyroelectric and Dielectric Properties of Ferroelectric Films with Interposed Dielectric Buffer Layers
Y. Espinal, M. T. Kesim, I. B. Misirlioglu, S. Trolier-McKinstry, J. V. Mantese, and S. P. Alpay, Appl. Phys. Lett. 105, 232905 (2014).
DOI: https://doi.org/10.1063/1.4903993

Layer Thickness and Period as Design Parameters to Tailor Pyroelectric Properties in Ferroelectric Superlattices
I. B. Misirlioglu, M. T. Kesim, and S. P. Alpay, Appl. Phys. Lett. 105, 172905 (2014).
DOI: https://doi.org/10.1063/1.4900940

Enhanced Electrocaloric and Pyroelectric Response from Ferroelectric Multilayers
M. T. Kesim, J. Zhang, S. P. Alpay and L. W. Martin, Appl. Phys. Lett. 105, 052901 (2014).
DOI: https://doi.org/10.1063/1.4892455

Strain Engineering of Piezoelectric Properties of Strontium Titanate Thin Films
F. Sun, H. Khassaf and S. P. Alpay, J. Mater. Sci., 49, 5978 (2014).
DOI: https://doi.org/10.1007/s10853-014-8316-y

Strain Engineered Barium Strontium Titanate for Tunable Thin Film Resonators
H. Khassaf, N. Khakpash, F.-C. Sun, N. M. Sbrockey, G. S. Tompa, T. S. Kalkur and S. P. Alpay, Appl. Phys. Lett. 104, 202902 (2014).
DOI: https://doi.org/10.1063/1.4879281

Strong Dependence of Dielectric Properties on Electrical Boundary Conditions and Interfaces in Ferroelectric Superlattices
I. B. Misirlioglu, M. T. Kesim, and S. P. Alpay, Appl. Phys. Lett. 104, 022906 (2014).
DOI: https://doi.org/10.1063/1.4862408

Tailoring Dielectric Properties of Ferroelectric-Dielectric Multilayers
M. T. Kesim, M. W. Cole, J. Zhang, I. B. Misirlioglu, and S. P. Alpay, Appl. Phys. Lett. 104, 022901 (2014).
DOI: https://doi.org/10.1063/1.4861716

2013

Pyroelectric Response of Lead Zirconate Titanate Thin Films on Silicon: Effect of Thermal Stresses
M. T. Kesim, J. Zhang, S. Trolier-McKinstry, J. V. Mantese, R. W. Whatmore, and S. P. Alpay, J. Appl. Phys. 114, 204101 (2013).
DOI: https://doi.org/10.1063/1.4833555

Challenges and Opportunities for Multi-functional Oxide Thin Films for Voltage Tunable Radio Frequency/Microwave Components
G. Subramanyam, M. W. Cole, N. X. Sun, T. S. Kalkur, N. M. Sbrockey, G. S. Tompa, X. Guo, C. Chen, S. P. Alpay, G. A. Rossetti Jr., K. Dayal, L.-Q. Chen, and D. G. Schlom, J. Appl. Phys. 114, 191301 (2013).
DOI: https://doi.org/10.1063/1.4827019

Enhanced Dielectric Properties from Barium Strontium Titanate Films with Strontium Titanate Buffer Layers
M. W. Cole, E. Ngo, C. Hubbard, S. G. Hirsch, M. Ivill, W. L. Sarney, J. Zhang, and S. P. Alpay, J. Appl. Phys. 114, 164107 (2013).
DOI: https://doi.org/10.1063/1.4827421

Strain Induced Variations in Band Offsets and Built-in Electric Fields in InGaN/GaN Multiple Quantum Wells
L. Dong, J. V. Mantese, V. Avrutin, Ü. Özgür, H. Morkoç, and S. P. Alpay, J. Appl. Phys. 114, 043715, (2013).
DOI: https://doi.org/10.1063/1.4816254

2012

Voltage Induced Acoustic Resonance in Metal Organic Chemical Vapor Deposition SrTiO3 Thin Film
N. M. Sbrockey, G. S. Tompa, T. S. Kalkur, J. Zhang, S. P. Alpay, and M. W. Cole, J. Vac. Sci. Technol. B 30, 061202 (2012).
DOI: https://doi.org/10.1116/1.4757129

Polarization, Piezoelectric Properties, and Elastic Coefficients of InxGa1-xN Solid Solutions from First Principles
L. Dong and S. P. Alpay, J. Mater. Sci. 47, 7587 (2012).
DOI: https://doi.org/10.1007/s10853-012-6351-0

Discontinuous Precipitation of β-Ru Phase in Ni-18Ru Alloys
Y. Liu, L. C. Zhang, B. S. Senturk, J. V. Mantese, S. P. Alpay and M. Aindow, J. Mater. Sci. 47, 5701 (2012).
DOI: https://doi.org/10.1007/s10853-012-6457-4

Role of Heteroepitaxial Misfit Strains on the Band Offsets of Zn1-xBexO/ZnO Quantum Wells: a First-principles Analysis
L. Dong and S. P. Alpay, J. Appl. Phys. 111, 113714 (2012).
DOI: https://doi.org/10.1063/1.4729079

Electrocaloric Properties of Epitaxial Strontium Titanate Films
J. Zhang, I. B. Misirlioglu, S. P. Alpay, and G. A. Rossetti Jr., Appl. Phys. Lett. 100, 222909 (2012).
DOI: https://doi.org/10.1063/1.4721668

Bulk-like Dielectric Properties from Metallo-organic Solution-deposited SrTiO3 Films on Pt-coated Si Substrates
C. V. Weiss, J. Zhang, M. Spies, L. S. Abdallah, S. Zollner, M. W. Cole, and S. P. Alpay, J. Appl. Phys. 111, 054108 (2012).
DOI: https://doi.org/10.1063/1.3692811

Effect of Microstructure on Native Oxide Scale Development and Electrical Characteristics of Eutectic Cu-Cu6La Alloys
B. S. Senturk, Y. Liu, J. V. Mantese, S. P. Alpay, and M. Aindow, Acta Mater. 60, 851 (2012).
DOI: https://doi.org/10.1016/j.actamat.2011.11.013

Electrical Domain Morphologies in Compositionally Graded Ferroelectric Films
M. B. Okatan, A. L. Roytburd, V. Nagarajan, and S. P. Alpay, J. Phys.: Condens. Matter. 24, 024215 (2012).
DOI: https://doi.org/10.1088/0953-8984/24/2/024215

2011

Theoretical Analysis of the Crystal Structure, Band-gap Energy, Polarization, and Piezoelectric Properties of ZnO-BeO Solid Solutions
L. Dong, and S. P. Alpay, Phys. Rev. B. 84, 035135 (2011).
DOI: https://doi.org/10.1103/PhysRevB.84.035315

Electrical and Tribological Properties of a Ni–18%Ru Alloy for Contact Applications
Y. Liu, B. S. Senturk, J. V. Mantese, M. Aindow, and S. P. Alpay, J. Mater. Sci. 46, 6563 (2011).
DOI: https://doi.org/10.1007/s10853-011-5603-8

Effect of Thermal Stresses on the Dielectric Properties of Strontium Titanate Thin Films
J. Zhang, C. V. Weiss, and S. P. Alpay, Appl. Phys. Lett. 99, 042902 (2011).
DOI: https://doi.org/10.1063/1.3617430

Influence of Thermal Stresses on the Electrocaloric Properties of Ferroelectric Films
J. Zhang, S. P. Alpay, and G. A. Rossetti Jr., Appl. Phys. Lett. 98, 132907 (2011).
DOI: https://doi.org/10.1063/1.3573788

2010

Theory of Giant Electromechanical Response from Ferroelectric Bilayers with Polydomain Structures due to Interlayer and Interdomain Coupling, R. Mahjoub, S. P. Alpay, and V. Nagarajan, Phys. Rev. Lett. 105, 197601 (2010).
DOI: https://doi.org/10.1103/PhysRevLett.105.197601

Contribution of space charges to the polarization of ferroelectric superlattices and its effect on dielectric properties, M. B. Okatan, I. B. Misirlioglu, and S. P. Alpay, Phys. Rev. B. 82, 094115 (2010).
DOI: https://doi.org/10.1103/PhysRevB.82.094115

Base metal alloys with self-healing native conductive oxides for electrical contact materials, M. Aindow, S. P. Alpay, Y. Liu, J. V. Mantese, and B. S. Senturk, Appl. Phys. Lett. 97, 152103 (2010).
DOI: https://doi.org/10.1063/1.3499369

Phase coexistence near a morphotropic phase boundary in Sm-doped BiFeO3 films, S. B. Emery, C.-J. Cheng, D. Kan, F. J. Rueckert, S. P. Alpay, V. Nagarajan, I. Takeuchi, and B. O. Wells Appl. Phys. Lett. 97, 152902 (2010).
DOI: https://doi.org/10.1063/1.3481065

Pyroelectric properties of barium strontium titanate films: Effect of thermal stresses, J. Zhang, M. W. Cole, and S. P. Alpay, J. Appl. Phys. 108, 054103 (2010).
DOI: https://doi.org/10.1063/1.3475482

Asymmetric hysteresis loops and smearing of the dielectric anomaly at the transition temperature due to space charges in ferroelectric thin films, I. B. Misirlioglu, M. B. Okatan, and S. P. Alpay, J. Appl. Phys. 108, 034105 (2010).
DOI: https://doi.org/10.1063/1.3457348

Phase diagrams, dielectric response, and piezoelectric properties of epitaxial ultrathin (001) lead zirconate titanate films under anisotropic misfit strains, Q. Y. Qiu, S. P. Alpay, and V. Nagarajan, J. Appl. Phys. 107, 114105 (2010).
DOI: https://doi.org/10.1063/1.3386465

Band gap tuning in GaN through equibiaxial in-plane strains, L. Dong, S. K. Yadav, R. Ramprasad, and S. P. Alpay, Appl. Phys. Lett. 96, 202106 (2010).
DOI: https://doi.org/10.1063/1.3431290

Effect of space charge on the polarization hysteresis characteristics of monolithic and compositionally graded ferroelectrics, M. B. Okatan, J. V. Mantese, and S. P. Alpay, Acta Mater. 58, 39 (2010).
DOI: https://doi.org/10.1016/j.actamat.2009.08.055

Misfit strain-film thickness phase diagrams and related electromechanical properties of epitaxial ultra-thin lead zirconate titanate films, Q. Y. Qui, R. Mahjoub, S. P. Alpay, and V. Nagarajan, Acta Mater. 58, 823 (2010).
DOI: https://doi.org/10.1016/j.actamat.2009.09.060

2009

Polarization coupling in ferroelectric multilayers, M. B. Okatan, J. V. Mantese, and S. P. Alpay, Phys. Rev. B. 79, 174113 (2009).
DOI: https://doi.org/10.1103/PhysRevB.79.174113

Ab initio study of ferroelectricity in BaTiO3 nanowires, G. Pilania, S. P. Alpay, and R. Ramprasad, Phys. Rev. B. 80, 014113 (2009).
DOI: https://doi.org/10.1103/PhysRevB.80.014113

Domain engineering in compositionally graded ferroelectric films for enhanced dielectric response and tunability, M. B. Okatan, A. L. Roytburd, J. V. Mantese, and S. P. Alpay, J. Appl. Phys. 105, 114106 (2009).
DOI: https://doi.org/10.1063/1.3142385

Electrothermal properties of perovskite ferroelectric films, J. Zhang, A. A. Heitmann, S. P. Alpay, and G. A. Rossetti Jr., J. Mater. Sci. 44, 5263 (2009).
DOI: https://doi.org/10.1007/s10853-009-3559-8

Compositionally graded ferroelectric multilayers for frequency agile tunable devices, C. V. Weiss, M. B. Okatan, S. P. Alpay, M. W. Cole, E. Ngo, and R. C. Toonen, J. Mater. Sci. 44, 5364 (2009).
DOI: https://doi.org/10.1007/s10853-009-3514-8

Recent developments in ferroelectric nanostructures and multilayers, S. P. Alpay, V. Nagarajan, and G. A. Rossetti, J. Mater. Sci. 44, 5021 (2009).
DOI: https://doi.org/10.1007/s10853-009-3788-x

Imprint in ferroelectric materials due to space charges: A theoretical analysis, M. B. Okatan and S. P. Alpay, Appl. Phys. Lett. 95, 092902 (2009).
DOI: https://doi.org/10.1063/1.3222871

Synthesis, characterization, and photocatalytic properties of ZnO/(La,Sr)CoO3 composite nanorod arrays, D. Jian, P. X. Gao, W. Cai, B. S. Allimi, S. P. Alpay, Y. Ding, Z. L. Wang, and C. Brooks, J. Mater. Chem. 19, 970 (2009).
DOI: https://doi.org/10.1039/B817235H

2008

Thickness dependence of electronic phase transitions in epitaxial V2O3 films on(0001) LiTaO3, B. S. Allimi, M. Aindow, and S. P. Alpay, Appl. Phys. Lett 93, 112109 (2008).
DOI: https://doi.org/10.1063/1.2978352

Cation ordering in epitaxial lead zirconate titanate films, L. C. Zhang, A. L. Vasiliev, I. B. Misirlioglu, R. Ramesh, S. P. Alpay, and M. Aindow, Appl. Phys. Lett. 93, 262903 (2008).
DOI: https://doi.org/10.1063/1.3058755

Ferroelastic domains in bilayered ferroelectric thin films, R. Mahjoub, V. Anbusathaiah, S. P. Alpay, and V. Nagarajan, J. Appl. Phys. 104, 124103 (2008).
DOI: https://doi.org/10.1063/1.3042222

Dielectric tunability of graded barium strontium titanate multilayers: Effect of thermal strains, M. B. Okatan, M. W. Cole, and S. P. Alpay, J. Appl. Phys. 104, 104107 (2008).
DOI: https://doi.org/10.1063/1.3026719

Resistivity of V2O3 thin films deposited on a-plane (110) and c-plane (001) sapphire by pulsed laser deposition, B. S. Allimi, S. P. Alpay, C. K. Xie, B. O. Wells, J. I. Budnick, and D. M. Pease, Appl. Phys. Lett. 92, 202105 (2008).
DOI: https://doi.org/10.1063/1.2921787

Microwave dielectric properties of graded barium strontium titanate films, M. W. Cole, C. V. Weiss, E. Ngo, S. Hirsch, L. A. Coryell, and S. P. Alpay, Appl. Phys. Lett. 92, 182906 (2008).
DOI: https://doi.org/10.1063/1.2919080

Enhanced piezoelectric response from barium strontium titanate multilayer films, R. Nath, S. Zhong, S. P. Alpay, B. D. Huey, and M. W. Cole, Appl. Phys. Lett. 92, 012916 (2008).
DOI: https://doi.org/10.1063/1.2825287

Dielectric properties of MgO-doped compositionally graded multilayer barium strontium titanate films, M. W. Cole, E. Ngo, S. Hirsch, M. B. Okatan, and S. P. Alpay, Appl. Phys. Lett. 92, 072906 (2008).
DOI: https://doi.org/10.1063/1.2870079

Influence of mechanical boundary conditions on the electrocaloric properties of ferroelectric thin films, G. Akcay, S. P. Alpay, G. A. Rossetti Jr., and J. F. Scott, J. Appl. Phys. 103, 024104 (2008).
DOI: https://doi.org/10.1063/1.2831222

2007

A comparative ab initio study of the ferroelectric behaviour in KNO3 and CaCO3, M. K. Aydinol, J. V. Mantese, and S. P. Alpay, J. Phys.: Condens. Matter 19, 496210 (2007).
DOI: https://doi.org/10.1088/0953-8984/19/49/496210

Growth of V2O3 thin films on a-plane (110) and c-plane (001) sapphire via pulsed-laser deposition, B. S. Allimi, S.P. Alpay, D. Goberman, T. Huang, J. I. Budnick, D. M. Pease, A. I. Frenkel, J. Mater. Res. 22, 2825 (2007).
DOI: https://doi.org/10.1557/JMR.2007.0378

The fabrication and material properties of compositionally multilayered Ba1-xSrxTiO3 thin films for realization of temperature insensitive tunable phase shifter devices, M. W. Cole, E. Ngo, S. Hirsch, J. D. Demaree, S. Zhong, S. P. Alpay, J. Appl. Phys. 102, 034104 (2007).
DOI: https://doi.org/10.1063/1.2761849

Strain induced internal potentials of compositionally graded epitaxial ferroelectric thin films, G. Akcay, S. Zhong, B. S. Allimi, S. P. Alpay, J. V. Mantese, Appl. Phys. Lett. 91, 012904 (2007).
DOI: https://doi.org/10.1063/1.2754358

Magnitude of the intrinsic electrocaloric effect in ferroelectric perovskite thin films at high electric fields, G. Akcay, S. P. Alpay, J. V. Mantese, G. A. Rossetti Jr., Appl. Phys. Lett. 90, 252909 (2007).
DOI: https://doi.org/10.1063/1.2750546

Dielectric and Pyroelectric Properties of Barium Strontium Titanate Films on Orthorhombic Substrates with (110)//(100) Epitaxy, G. Akcay, I. B. Misirlioglu, S. P. Alpay, J. Appl. Phys. 101, 104110 (2007).
DOI: https://doi.org/10.1063/1.2729474

Highly tunable and temperature insensitive multilayer barium strontium titanate films, S. Zhong, S. P. Alpay, M. W. Cole, E. Ngo, S. Hirsch, and J. D. Demaree, Appl. Phys. Lett. 90, 092901 (2007).
DOI: https://doi.org/10.1063/1.2710005

Interface effects in ferroelectric bilayers and heterostructures, I. B. Misirlioglu, G. Akcay, S. Zhong, S. P. Alpay, J. Appl. Phys. 101, 036107 (2007).
DOI: https://doi.org/10.1063/1.2433766

Internal magnetostatic potentials of magnetization-graded ferromagnetic materials, C. Sudakar, R. Naik, G. Lawesa, J. V. Mantese, A. L. Micheli, G. Srinivasan, S. P. Alpay, Appl. Phys. Lett. 90, 062502 (2007).
DOI: https://doi.org/10.1063/1.2437721

2006

Large Piezoelectric Strains from Polarization Graded Ferroelectrics
S. Zhong, Z.-G. Ban, S. P. Alpay, and J. V. Mantese, Appl. Phys. Lett. 89, 142913 (2006).
DOI: https://doi.org/10.1063/1.2358963

Dielectric Tunability of (110) Oriented Barium Strontium Titanate Epitaxial Films on (100) Orthorhombic Substrates
G. Akcay, I. B. Misirlioglu, and S. P. Alpay, Appl. Phys. Lett. 89, 042903 (2006).
DOI: https://doi.org/10.1063/1.2234839

High Capacity Oxide/Ferroelectric/Oxide Stacks for On-chip Charge Storage
S. Zhong, S. P. Alpay, and J. V. Mantese, Appl. Phys. Lett. 89, 042906 (2006).
DOI: https://doi.org/10.1063/1.2236265

Piezoelectric and Dielectric Tunabilities of Ultra-thin Ferroelectric Heterostructures
S. Zhong, S. P. Alpay, and V. Nagarajan, J. Mater. Res. 21, 1600 (2006).
DOI: https://doi.org/10.1557/jmr.2006.0193

Stress Induced Monoclinic Phase in Epitaxial BaTiO3 on MgO
I. B. Misirlioglu and S. P. Alpay, F. He and B. O. Wells, J. Appl. Phys. 99, 104103 (2006).
DOI: https://doi.org/10.1063/1.2198938

High Dielectric Tunability in Ferroelectric-paraelectric Bilayers and Multilayer Superlattices
S. Zhong, S. P. Alpay, and J. V. Mantese, Appl. Phys. Lett. 88, 132904 (2006).
DOI: https://doi.org/10.1063/1.2189909

Thermodynamic and Electrostatic Analysis of Threading Dislocations in Epitaxial Ferroelectric Films
I. B. Misirlioglu, S. P. Alpay, M. Aindow, and V. Nagarajan, Appl. Phys. Lett. 88, 102906 (2006).
DOI: https://doi.org/10.1063/1.2178194

Dynamic Pyroelectric Enhancement of Homogeneous Ferroelectric Materials
G. Akcay, S. Zhong, S. P. Alpay, J. V. Mantese, Solid State Communications 137, 589 (2006).
DOI: https://doi.org/10.1016/j.ssc.2006.01.013

Defect Microstructures in Epitaxial PbZr0.2Ti0.8O3 Films Grown on (001) SrTiO3 by Pulsed Laser Deposition
I. B. Misirlioglu, A. L. Vasiliev, S. P. Alpay, M. Aindow, R. Ramesh, J. Mater. Sci. 41, 697 (2006).
DOI: https://doi.org/10.1007/s10853-006-6488-9

Effect of Strain on Tunability in Ba0.60Sr0.40TiO3 Thin Films on Pt-Si Substrates
D. M. Potrepka, S. Hirsch, M. W. Cole, W. D. Nothwang, S. Zhong, and S. P. Alpay, J. Appl. Phys. 99, 014108 (2006).
DOI: https://doi.org/10.1063/1.2159557

2005

Origin of pseudo-elastic behavior in Ti-Mo-based alloys, L. C. Zhang, T. Zhou, S. P. Alpay, M. Aindow, M. H. Wu, Appl. Phys. Lett. 87, 241909 (2005).
DOI: https://doi.org/10.1063/1.2142089

Compositional symmetry breaking in ferroelectric bilayers, S. Zhong, S. P. Alpay, J. V. Mantese, Appl. Phys. Lett. 87, 102902 (2005).
DOI: https://doi.org/10.1063/1.2039990

Dielectric anomaly due to electrostatic coupling in ferroelectric-paraelectric bilayers and multilayers, A. L. Roytburd, S. Zhong and S. P. Alpay, Appl. Phys. Lett. 87, 092902 (2005).
DOI: https://doi.org/10.1063/1.2032601

Magnetization-graded ferromagnets: The magnetic analogs of semiconductor junction elements, J. V. Mantese, A. L. Micheli, N. W. Schubring, R. W. Hayes, G. Srinivasan, S. P. Alpay, Appl. Phys. Lett. 87, 082503 (2005).
DOI: https://doi.org/10.1063/1.2012526

Nucleation of stress induced martensites in a Ti/Mo based alloy, L. C. Zhang, T. Zhou, M. Aindow, S. P. Alpay and M. J. Blackburn, Journal of Materials Science 40, 2833 (2005).
DOI: https://doi.org/10.1007/s10853-005-2426-5

Misfit dislocations in ferroelectric heterostructures, V. Nagarajan, C. L. Jia, H. Kohlstedt, R. Waser, I. B. Misirlioglu, S. P. Alpay, R. Ramesh, Appl. Phys. Lett. 86, 192910 (2005).
DOI: https://doi.org/10.1063/1.1922579

Effective pyroelectric response of compositionally graded ferroelectric materials, S. Zhong, S. P. Alpay, Z.-G. Ban, J. V. Mantese, Appl. Phys. Lett. 86, 092903 (2005).
DOI: https://doi.org/10.1063/1.1866505

2004

Structural phase transition in epitaxial perovskite films, Feizhou He, B. O. Wells, Z. -G. Ban, S. P. Alpay, S. Grenier, S. M. Shapiro, W. Si, A. Clark, X. X. Xi, Phys. Rev. B 70, 235405 (2004).
DOI: https://doi.org/10.1103/PhysRevB.70.235405

Can interface dislocations degrade ferroelectric properties?, S. P. Alpay, I. B. Misirlioglu, V. Nagarajan, R. Ramesh, Appl. Phys. Lett. 85, 2044 (2004).
DOI: https://doi.org/10.1063/1.1788894

The role of thermally-induced internal stresses on the tunability of textured barium strontium titanate thin films, A. Sharma, Z.-G. Ban, S. P. Alpay, J. V. Mantese, Appl. Phys. Lett. 85, 985 (2004).
DOI: https://doi.org/10.1063/1.1781356

Structural characteristics of ferroelectric phase transformations in single-domain epitaxial films, S. P. Alpay, I. B. Misirlioglu, A. Sharma, Z.-G. Ban, J. Appl. Phys. 95, 8118 (2004).
DOI: https://doi.org/10.1063/1.1751630

Effect of operating temperature and film thickness on the pyroelectric response of ferroelectric materials, A. Sharma, Z.-G. Ban, S. P. Alpay, J. V. Mantese, Appl. Phys. Lett. 84, 4959 (2004).
DOI: https://doi.org/10.1063/1.1762691

Multiple relaxation mechanisms in SrTiO3/SrRuO3 heterostructures, Z.-G. Ban, S. P. Alpay, F. He, B. O. Wells, X. X. Xi, Appl. Phys. 84, 4848 (2004).
DOI: https://doi.org/10.1063/1.1760228

Pyroelectric response of ferroelectric thin films, A. Sharma, Z.-G. Ban, S. P. Alpay, J. V. Mantese, J. Appl. Phys. 95, 3618 (2004).
DOI: https://doi.org/10.1063/1.1649460

Threading dislocation generation in epitaxial (Ba,Sr)TiO3 films grown on (001) LaAlO3 by pulsed laser deposition, I. B. Misirlioglu, A. L. Vasiliev, M. Aindow, S. P. Alpay, R. Ramesh, Appl. Phys. Lett. 84, 1742 (2004).
DOI: https://doi.org/10.1063/1.1664035

Pseudo elastic deformation behavior in a Ti/Mo-based alloy, T. Zhou, M. Aindow, S. P. Alpay, M. J. Blackburn, M. H. Wu, Scripta Materialia 50, 343 (2004).
DOI: https://doi.org/10.1016/j.scriptamat.2003.10.012

2003

Strain relaxation during in situ growth of SrTiO3 thin films, L. S.-J. Peng, X. X. Xi, B. H. Moeckly, S. P. Alpay, Appl. Phys. Lett. 83, 4592 (2003).
DOI: https://doi.org/10.1063/1.1631055

Dependence of the pyroelectric response on internal stresses in ferroelectric thin films, Z.-G. Ban, S. P. Alpay, Appl. Phys. Lett. 82, 3499 (2003).
DOI: https://doi.org/10.1063/1.1576503

Fundamentals of graded ferroic materials and devices, Z.-G. Ban, S. P. Alpay, J. V. Mantese, Phys. Rev. B 67, 184104 (2003).
DOI: https://doi.org/10.1103/PhysRevB.67.184104

Thermodynamic analysis of temperature graded ferroelectrics, S. P. Alpay, Z.-G. Ban, J. V. Mantese, Appl. Phys. Lett. 82, 1269 (2003).
DOI: https://doi.org/10.1063/1.1556565

Optimization of the tunability of barium strontium titanate films via epitaxial stresses, Z.-G. Ban and S. P. Alpay, J. Appl. Phys. 93, 504 (2003).
DOI: https://doi.org/10.1063/1.1524310

2002

Stress-induced polarization-graded ferroelectrics, J. V. Mantese, N. W. Schubring, A. L. Micheli, M. P. Thompson, R. Naik, G. W. Auner, I. B. Misirlioglu and S. P. Alpay, Appl. Phys. Lett. 81, 1068 (2002).
DOI: https://doi.org/10.1063/1.1498506

Phase Diagrams and Dielectric Response of Epitaxial Barium Strontium Titanate Films: A Theoretical Analysis, Z.-G. Ban and S. P. Alpay, J. Appl. Phys. 91, 9288 (2002).
DOI: https://doi.org/10.1063/1.1473675

Imaging 3-Dimensional Polarization in Epitaxial Polydomain Ferroelectric Thin Films, C. S. Ganpule, B. K. Hill, V. Nagarajan, A. L. Roytburd, E. D. Williams, R. Ramesh, S. P. Alpay, A. Roelofs, R. Waser, and L. M. Eng, J. Appl. Phys. 91, 1477 (2002).
DOI: https://doi.org/10.1063/1.1421219

2001–1998

Dependence of Dielectric Properties on Internal Stresses in Epitaxial Barium Strontium Titanate Thin Films, H. Li, A. L. Roytburd, S. P. Alpay, T. D. Tran, L. Salamanca-Riba, and R. Ramesh, Appl. Phys. Lett. 78, 2354 (2001).
DOI: https://doi.org/10.1063/1.1359141

Three-domain Architecture of Stress-free Epitaxial Ferroelectric Films, A. L. Roytburd, S. P. Alpay, L. A. Bendersky, V. Nagarajan, and R. Ramesh, J. Appl. Phys. 89, 553 (2001).
DOI: https://doi.org/10.1063/1.1328781

Dielectric Properties in Heteroepitaxial Ba0.6Sr0.4TiO3 Thin Films: Effect of Internal Stress and Dislocation-type Defects, C. L. Canedy, H. Li, S. P. Alpay, L. Salamanca-Riba, A. L. Roytburd, and R. Ramesh, Appl. Phys. Lett. 77, 1695 (2000).
DOI: https://doi.org/10.1063/1.1308531

Role of Substrate on the Dielectric and Piezoelectric Behavior of Epitaxial Lead Magnesium Niobate-Lead Titanate Relaxor Thin Films, V. Nagarajan, S. P. Alpay, C. S. Ganpule, B. K. Nagaraj, S. Aggarwal, E. D. Williams, A. L. Roytburd, and R. Ramesh, Appl. Phys. Lett. 77, 438 (2000).
DOI: https://doi.org/10.1063/1.127002

Measurement of Internal Stresses via the Polarization in Epitaxial Ferroelectric Thin Films, A.L. Roytburd, S. P. Alpay, V. Nagarajan, C. S. Ganpule, S. Aggarwal, E. D. Williams, and R. Ramesh, Phys. Rev. Lett. 85, 190 (2000).
DOI: https://doi.org/10.1103/PhysRevLett.85.190

Effect of Mechanical Constraint on the Dielectric Properties of Epitaxial Pb(Mg1/3Nb2/3)O3(90%)-PbTiO3(10%) Relaxor Thin Films, V. Nagarajan, C. S. Ganpule, B. Nagaraj, S. Aggarwal, S. P. Alpay, A. L. Roytburd, E. D. Williams, and R. Ramesh, Appl. Phys. Lett. 75, 4183 (1999).
DOI: https://doi.org/10.1063/1.125576

Thickness Dependence of Structural and Electrical Properties in Epitaxial Lead Zirconate Titanate Films, V. Nagarajan, I. G. Jenkins, S. A. Alpay, H. Li, S. Aggarwal, L. Salamanca-Riba, A. L. Roytburd, and R. Ramesh, J. Appl. Phys. 86, 595 (1999).
DOI: https://doi.org/10.1063/1.370772

Effect of the Electrode Layer on the Polydomain Structure of Epitaxial PbZr0.2Ti0.8O3 Thin Films, S. P. Alpay, V. Nagarajan, L. A. Bendersky, M. D. Vaudin, S. Aggarwal, R. Ramesh, and A. L. Roytburd, J. Appl. Phys. 85, 3271 (1999).
DOI: https://doi.org/10.1063/1.369670

Thermodynamics of Polydomain Heterostructures. III. Domain Stability Map, S. P. Alpay, A. L. Roytburd, J. Appl. Phys. 83, 4714 (1998).
DOI: https://doi.org/10.1063/1.367260