Lattice distortion and stability of (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O high-entropy oxide under high pressure

B. Cheng; H. Lou; A. Sarkar; Z. Zeng; F. Zhang; X. Chen; L. Tan; K. Glazyrin; H.-P. liermann; J. Yan; L. Wang; R. Djenadic; H. Hahn; Q. Zeng

Materials Today Advances (Dec 2020)

Lattice distortion and stability of (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O high-entropy oxide under high pressure

B. Cheng,
H. Lou,
A. Sarkar,
Z. Zeng,
F. Zhang,
X. Chen,
L. Tan,
K. Glazyrin,
H.-P. liermann,
J. Yan,
L. Wang,
R. Djenadic,
H. Hahn,
Q. Zeng

Affiliations

B. Cheng: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Shanghai Institute of Laser Plasma, Shanghai, 201800, People's Republic of China
H. Lou: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China
A. Sarkar: Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt and Karlsruhe Institute of Technology, 64287 Darmstadt, Germany; Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Z. Zeng: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China
F. Zhang: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China
X. Chen: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China
L. Tan: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China
K. Glazyrin: Photon Sciences, Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany
H.-P. liermann: Photon Sciences, Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany
J. Yan: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA 95064, USA
L. Wang: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
R. Djenadic: Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt and Karlsruhe Institute of Technology, 64287 Darmstadt, Germany
H. Hahn: Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt and Karlsruhe Institute of Technology, 64287 Darmstadt, Germany; Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Q. Zeng: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, People's Republic of China; Corresponding author.

Journal volume & issue: Vol. 8
p. 100102

Abstract

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High-entropy oxides (HEOs) stabilize multiple cations in a single solid solution phase, providing a new opportunity for property engineering in almost infinite compositional space. The structural stability and tunability of HEO are of great interest and importance but has not been well understood, especially under pressure. Here, we studied the structure evolution of a rock salt phase (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O HEO using in situ synchrotron X-ray diffraction, pair distribution function, Raman spectroscopy up to ~43 GPa, and ex situ transmission electron microscopy, a pressure-induced reversible rock salt to highly distorted cubic phase transition was observed. These results suggest highly tunable lattice distortion in HEOs under pressure, which could promote the fundamental understanding and also guide applications of HEOs.

Published in Materials Today Advances

ISSN: 2590-0498 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-today-advances

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