Phase transitions and octahedral rotations in epitaxial Ag(TaxNb1-x)O3 thin films under tensile strain

Johnson-Wilke, R. L.; Wilke, R. H. T.; Yeager, C. B.; Tinberg, D. S.; Reaney, I. M.; Levin, I.; Fong, D. D.; Trolier-McKinstry, S.

doi:10.1063/1.4913283

Title: Phase transitions and octahedral rotations in epitaxial Ag(Ta_xNb_1-x)O₃ thin films under tensile strain

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Abstract

In this paper, epitaxial Ag(Ta_0.5Nb_0.5)O₃ (ATN) films under tensile strain were deposited on (Ba_0.4Sr_0.6)TiO₃/LaAlO₃ (001)_p and KTaO₃ (001) substrates. These films exhibited a domain structure with the c-axis aligned primarily along the in-plane direction in contrast with the poly-domain nature of bulk ATN ceramics or relaxed films. While the generic phase transition sequence of the tensile films was qualitatively similar to bulk, the tetragonal and orthorhombic phase field regions expanded by ~270 °C in ATN/(Ba_0.4Sr_0.6)TiO₃/LaAlO₃. Furthermore, the films were found to be in the M₃ (complex octahedral tilting with disordered Nb/Ta displacements) phase at room temperature with either significantly reduced tilt angles or a suppression of the long range order of the complex tilt as compared to bulk materials. It was observed that the octahedral tilt domains were oriented with the complex tilt axes lying in the plane of the film due to the tensile strain. Finally, this work demonstrates that tensile strain can be used to strain-engineer materials with complex tilt systems and thereby modify functional properties.

Authors:

Johnson-Wilke, R. L. ^[1]; Wilke, R. H. T. ^[1]; Yeager, C. B. ^[1]; Tinberg, D. S. ^[1]; Reaney, I. M. ^[2]; Levin, I. ^[3]; Fong, D. D. ^[4]; Trolier-McKinstry, S. ^[1]

Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst. Materials Science and Engineering Dept.
Univ. of Sheffield (United Kingdom). Dept. of Engineering Materials
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Materials Measurement Science Division
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division

Publication Date:: Fri Feb 27 00:00:00 EST 2015

Research Org.:: Pennsylvania State Univ., University Park, PA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Contributing Org.:: Univ. of Sheffield (United Kingdom); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

OSTI Identifier:: 1356997

Alternate Identifier(s):: OSTI ID: 1228557

Grant/Contract Number:: AC02-06CH11357; DMR-0602770; DMR-0820404; DMR-0908718

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 117; Journal Issue: 8; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Thin film structure; Niobium; Superlattices; Materials properties; Phase transitions

Citation Formats


                    Johnson-Wilke, R. L., Wilke, R. H. T., Yeager, C. B., Tinberg, D. S., Reaney, I. M., Levin, I., Fong, D. D., and Trolier-McKinstry, S. Phase transitions and octahedral rotations in epitaxial Ag(TaxNb1-x)O3 thin films under tensile strain.  United States: N. p., 2015. 
Web.  doi:10.1063/1.4913283.

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                    Johnson-Wilke, R. L., Wilke, R. H. T., Yeager, C. B., Tinberg, D. S., Reaney, I. M., Levin, I., Fong, D. D., & Trolier-McKinstry, S. Phase transitions and octahedral rotations in epitaxial Ag(TaxNb1-x)O3 thin films under tensile strain.  United States.  https://doi.org/10.1063/1.4913283

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                    Johnson-Wilke, R. L., Wilke, R. H. T., Yeager, C. B., Tinberg, D. S., Reaney, I. M., Levin, I., Fong, D. D., and Trolier-McKinstry, S. Fri .  
"Phase transitions and octahedral rotations in epitaxial Ag(TaxNb1-x)O3 thin films under tensile strain".  United States.  https://doi.org/10.1063/1.4913283.  https://www.osti.gov/servlets/purl/1356997.

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@article{osti_1356997,

  title        = {Phase transitions and octahedral rotations in epitaxial Ag(TaxNb1-x)O3 thin films under tensile strain},

  author       = {Johnson-Wilke, R. L. and Wilke, R. H. T. and Yeager, C. B. and Tinberg, D. S. and Reaney, I. M. and Levin, I. and Fong, D. D. and Trolier-McKinstry, S.},

  abstractNote = {In this paper, epitaxial Ag(Ta0.5Nb0.5)O3 (ATN) films under tensile strain were deposited on (Ba0.4Sr0.6)TiO3/LaAlO3 (001)p and KTaO3 (001) substrates. These films exhibited a domain structure with the c-axis aligned primarily along the in-plane direction in contrast with the poly-domain nature of bulk ATN ceramics or relaxed films. While the generic phase transition sequence of the tensile films was qualitatively similar to bulk, the tetragonal and orthorhombic phase field regions expanded by ~270 °C in ATN/(Ba0.4Sr0.6)TiO3/LaAlO3. Furthermore, the films were found to be in the M3 (complex octahedral tilting with disordered Nb/Ta displacements) phase at room temperature with either significantly reduced tilt angles or a suppression of the long range order of the complex tilt as compared to bulk materials. It was observed that the octahedral tilt domains were oriented with the complex tilt axes lying in the plane of the film due to the tensile strain. Finally, this work demonstrates that tensile strain can be used to strain-engineer materials with complex tilt systems and thereby modify functional properties.},

  doi          = {10.1063/1.4913283},

  journal      = {Journal of Applied Physics},

  number       = 8,

  volume       = 117,

  place        = {United States},

  year         = {Fri Feb 27 00:00:00 EST 2015},

  month        = {Fri Feb 27 00:00:00 EST 2015}

}

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Title: Phase transitions and octahedral rotations in epitaxial Ag(TaxNb1-x)O3 thin films under tensile strain

Abstract

Citation Formats

Title: Phase transitions and octahedral rotations in epitaxial Ag(Ta_xNb_1-x)O₃ thin films under tensile strain