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

doi:10.1016/j.mtadv.2020.100102

Lattice distortion and stability of (Co_0.2Cu_0.2Mg_0.2Ni_0.2Zn_0.2)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^*

^*Corresponding author for this work

School of Material Science and Engineering

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

31 Citations (Scopus)

Abstract

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 (Co_0.2Cu_0.2Mg_0.2Ni_0.2Zn_0.2)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.

Original language	English
Article number	100102
Journal	Materials Today Advances
Volume	8
DOIs	https://doi.org/10.1016/j.mtadv.2020.100102
Publication status	Published - Dec 2020

Keywords

Nanocrystalline
Pair distribution function
Phase transition
Synchrotron x-ray diffraction

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

abstract = "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.",

keywords = "Nanocrystalline, Pair distribution function, Phase transition, Synchrotron x-ray diffraction",

author = "B. Cheng and H. Lou and A. Sarkar and Z. Zeng and F. Zhang and X. Chen and L. Tan and K. Glazyrin and liermann, {H. P.} and J. Yan and L. Wang and R. Djenadic and H. Hahn and Q. Zeng",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = dec,

doi = "10.1016/j.mtadv.2020.100102",

language = "English",

volume = "8",

journal = "Materials Today Advances",

issn = "2590-0498",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Lattice distortion and stability of (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O high-entropy oxide under high pressure

AU - Cheng, B.

AU - Lou, H.

AU - Sarkar, A.

AU - Zeng, Z.

AU - Zhang, F.

AU - Chen, X.

AU - Tan, L.

AU - Glazyrin, K.

AU - liermann, H. P.

AU - Yan, J.

AU - Wang, L.

AU - Djenadic, R.

AU - Hahn, H.

AU - Zeng, Q.

PY - 2020/12

Y1 - 2020/12

N2 - 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.

AB - 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.

KW - Nanocrystalline

KW - Pair distribution function

KW - Phase transition

KW - Synchrotron x-ray diffraction

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U2 - 10.1016/j.mtadv.2020.100102

DO - 10.1016/j.mtadv.2020.100102

M3 - Article

AN - SCOPUS:85089430687

SN - 2590-0498

VL - 8

JO - Materials Today Advances

JF - Materials Today Advances

M1 - 100102

ER -

Lattice distortion and stability of (Co_0.2Cu_0.2Mg_0.2Ni_0.2Zn_0.2)O high-entropy oxide under high pressure

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Keywords

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