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Title: Single-crystal high entropy perovskite oxide epitaxial films

Abstract

Examples of single-crystal epitaxial thin films of a high entropy perovskite oxide are synthesized. Pulsed laser deposition is used to grow the configurationally disordered $$AB{\mathrm{O}}_{3}$$ perovskite $$\mathrm{Ba}(\mathrm{Z}{\mathrm{r}}_{0.2}\mathrm{S}{\mathrm{n}}_{0.2}\mathrm{T}{\mathrm{i}}_{0.2}\mathrm{H}{\mathrm{f}}_{0.2}\mathrm{N}{\mathrm{b}}_{0.2}){\mathrm{O}}_{3}$$ epitaxially on $$\mathrm{SrTi}{\mathrm{O}}_{3}$$ and MgO substrates. X-ray diffraction and scanning transmission electron microscopy demonstrate that the films are single phase with excellent crystallinity and atomically abrupt interfaces to the underlying substrates. Atomically resolved electron-energy-loss spectroscopy mapping shows a uniform and random distribution of all $B$-site cations. The ability to stabilize perovskites with this level of configurational disorder offers new possibilities for designing materials from a much broader combinatorial cation pallet while providing a fresh avenue for fundamental studies in strongly correlated quantum materials where local disorder can play a critical role in determining macroscopic properties.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); ORNL Laboratory Directed Research and Development (LDRD) Program; Gordon and Betty Moore Foundation (United States)
OSTI Identifier:
1457481
Alternate Identifier(s):
OSTI ID: 1460198
Grant/Contract Number:  
AC05-00OR22725; GBMF4416
Resource Type:
Published Article
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Name: Physical Review Materials Journal Volume: 2 Journal Issue: 6; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; synthesis; thermal conductivity; perovskite; thin films; thermoreflectance; laser ablation

Citation Formats

Sharma, Yogesh, Musico, Brianna L., Gao, Xiang, Hua, Chengyun, May, Andrew F., Herklotz, Andreas, Rastogi, Ankur, Mandrus, David, Yan, Jiaqiang, Lee, Ho Nyung, Chisholm, Matthew F., Keppens, Veerle, and Ward, T. Zac. Single-crystal high entropy perovskite oxide epitaxial films. United States: N. p., 2018. Web. doi:10.1103/PhysRevMaterials.2.060404.
Sharma, Yogesh, Musico, Brianna L., Gao, Xiang, Hua, Chengyun, May, Andrew F., Herklotz, Andreas, Rastogi, Ankur, Mandrus, David, Yan, Jiaqiang, Lee, Ho Nyung, Chisholm, Matthew F., Keppens, Veerle, & Ward, T. Zac. Single-crystal high entropy perovskite oxide epitaxial films. United States. doi:10.1103/PhysRevMaterials.2.060404.
Sharma, Yogesh, Musico, Brianna L., Gao, Xiang, Hua, Chengyun, May, Andrew F., Herklotz, Andreas, Rastogi, Ankur, Mandrus, David, Yan, Jiaqiang, Lee, Ho Nyung, Chisholm, Matthew F., Keppens, Veerle, and Ward, T. Zac. Wed . "Single-crystal high entropy perovskite oxide epitaxial films". United States. doi:10.1103/PhysRevMaterials.2.060404.
@article{osti_1457481,
title = {Single-crystal high entropy perovskite oxide epitaxial films},
author = {Sharma, Yogesh and Musico, Brianna L. and Gao, Xiang and Hua, Chengyun and May, Andrew F. and Herklotz, Andreas and Rastogi, Ankur and Mandrus, David and Yan, Jiaqiang and Lee, Ho Nyung and Chisholm, Matthew F. and Keppens, Veerle and Ward, T. Zac},
abstractNote = {Examples of single-crystal epitaxial thin films of a high entropy perovskite oxide are synthesized. Pulsed laser deposition is used to grow the configurationally disordered $AB{\mathrm{O}}_{3}$ perovskite $\mathrm{Ba}(\mathrm{Z}{\mathrm{r}}_{0.2}\mathrm{S}{\mathrm{n}}_{0.2}\mathrm{T}{\mathrm{i}}_{0.2}\mathrm{H}{\mathrm{f}}_{0.2}\mathrm{N}{\mathrm{b}}_{0.2}){\mathrm{O}}_{3}$ epitaxially on $\mathrm{SrTi}{\mathrm{O}}_{3}$ and MgO substrates. X-ray diffraction and scanning transmission electron microscopy demonstrate that the films are single phase with excellent crystallinity and atomically abrupt interfaces to the underlying substrates. Atomically resolved electron-energy-loss spectroscopy mapping shows a uniform and random distribution of all $B$-site cations. The ability to stabilize perovskites with this level of configurational disorder offers new possibilities for designing materials from a much broader combinatorial cation pallet while providing a fresh avenue for fundamental studies in strongly correlated quantum materials where local disorder can play a critical role in determining macroscopic properties.},
doi = {10.1103/PhysRevMaterials.2.060404},
journal = {Physical Review Materials},
number = 6,
volume = 2,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevMaterials.2.060404

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Cited by: 14 works
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