Single-crystal high entropy perovskite oxide epitaxial films

Yogesh Sharma; Brianna L. Musico; Xiang Gao; Chengyun Hua; Andrew F. May; Andreas Herklotz; Ankur Rastogi; David Mandrus; Jiaqiang Yan; Ho Nyung Lee; Matthew F. Chisholm; Veerle Keppens; T. Zac Ward

doi:10.1103/PhysRevMaterials.2.060404

Single-crystal high entropy perovskite oxide epitaxial films

Yogesh Sharma, Brianna L. Musico, Xiang Gao, Chengyun Hua, Andrew F. May, Andreas Herklotz, Ankur Rastogi, David Mandrus, Jiaqiang Yan, Ho Nyung Lee, Matthew F. Chisholm, Veerle Keppens, T. Zac Ward

Research output: Contribution to journal › Article › peer-review

159 Scopus citations

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 ABO3 perovskite Ba(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3 epitaxially on SrTiO3 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.

Original language	English
Article number	060404
Journal	Physical Review Materials
Volume	2
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevMaterials.2.060404
State	Published - Jun 27 2018

Funding

The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan [51] . This work was supported by the Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. TDTR measurements were supported by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy. B.L.M. acknowledges the support of the Center for Materials Processing, a Tennessee Higher Education Commission (THEC) supported Accomplished Center of Excellence. D.M. acknowledges support from the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant No. GBMF4416. Research was in part conducted through user proposal at the Center for Nanophase Materials Sciences, which is a US DOE, Office of Science User Facility. Powder XRD was performed at the Joint Institute for Advanced Materials (JIAM) Diffraction Facility, located at the University of Tennessee, Knoxville.

Funders	Funder number
THEC
Tennessee Higher Education Commission
US Department of Energy
U.S. Department of Energy
Gordon and Betty Moore Foundation
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering

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10.1103/PhysRevMaterials.2.060404

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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 ABO3 perovskite Ba(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3 epitaxially on SrTiO3 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.",

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AU - Yan, Jiaqiang

AU - Lee, Ho Nyung

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AU - Ward, T. Zac

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N2 - 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 ABO3 perovskite Ba(Zr0.2Sn0.2Ti0.2Hf0.2Nb0.2)O3 epitaxially on SrTiO3 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.

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Single-crystal high entropy perovskite oxide epitaxial films

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