Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide

Junjie Zhang; Jiaqiang Yan; Stuart Calder; Qiang Zheng; Michael A. McGuire; Douglas L. Abernathy; Yang Ren; Saul H. Lapidus; Katharine Page; Hong Zheng; John W. Freeland; John D. Budai; Raphael P. Hermann

doi:10.1021/acs.chemmater.9b00624

Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide

Junjie Zhang^*
, Jiaqiang Yan
, Stuart Calder
, Qiang Zheng
, Michael A. McGuire
, Douglas L. Abernathy
, Yang Ren
, Saul H. Lapidus
, Katharine Page
, Hong Zheng
, John W. Freeland
, John D. Budai
, Raphael P. Hermann

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

182 Citations (Scopus)

Abstract

We report for the first time the magnetic structure of the high entropy oxide (Mg_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2)O using neutron powder diffraction. This material exhibits a sluggish magnetic transition but possesses a long-range ordered antiferromagnetic ground state, as revealed by direct current and alternating current magnetic susceptibility, neutron diffraction, and spectroscopy. The magnetic propagation wavevector is k = (1/2, 1/2, 1/2) based on the cubic structure Fm3 m, and the magnetic structure consists of ferromagnetic sheets in the (111) planes with spins antiparallel between two neighboring planes. Neutron spectroscopy reveals strong magnetic excitations at 100 K that survive up to room temperature. This work demonstrates that entropy-stabilized oxides represent a unique platform to study long-range magnetic order with an extreme chemical disorder.

Original language	English
Pages (from-to)	3705-3711
Journal	Chemistry of Materials
Volume	31
Issue number	10
DOIs	https://doi.org/10.1021/acs.chemmater.9b00624
Publication status	Published - 28 May 2019
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide",

abstract = "We report for the first time the magnetic structure of the high entropy oxide (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O using neutron powder diffraction. This material exhibits a sluggish magnetic transition but possesses a long-range ordered antiferromagnetic ground state, as revealed by direct current and alternating current magnetic susceptibility, neutron diffraction, and spectroscopy. The magnetic propagation wavevector is k = (1/2, 1/2, 1/2) based on the cubic structure Fm3 m, and the magnetic structure consists of ferromagnetic sheets in the (111) planes with spins antiparallel between two neighboring planes. Neutron spectroscopy reveals strong magnetic excitations at 100 K that survive up to room temperature. This work demonstrates that entropy-stabilized oxides represent a unique platform to study long-range magnetic order with an extreme chemical disorder.",

author = "Junjie Zhang and Jiaqiang Yan and Stuart Calder and Qiang Zheng and McGuire, \{Michael A.\} and Abernathy, \{Douglas L.\} and Yang Ren and Lapidus, \{Saul H.\} and Katharine Page and Hong Zheng and Freeland, \{John W.\} and Budai, \{John D.\} and Hermann, \{Raphael P.\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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doi = "10.1021/acs.chemmater.9b00624",

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TY - JOUR

T1 - Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide

AU - Zhang, Junjie

AU - Yan, Jiaqiang

AU - Calder, Stuart

AU - Zheng, Qiang

AU - McGuire, Michael A.

AU - Abernathy, Douglas L.

AU - Ren, Yang

AU - Lapidus, Saul H.

AU - Page, Katharine

AU - Zheng, Hong

AU - Freeland, John W.

AU - Budai, John D.

AU - Hermann, Raphael P.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2019/5/28

Y1 - 2019/5/28

N2 - We report for the first time the magnetic structure of the high entropy oxide (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O using neutron powder diffraction. This material exhibits a sluggish magnetic transition but possesses a long-range ordered antiferromagnetic ground state, as revealed by direct current and alternating current magnetic susceptibility, neutron diffraction, and spectroscopy. The magnetic propagation wavevector is k = (1/2, 1/2, 1/2) based on the cubic structure Fm3 m, and the magnetic structure consists of ferromagnetic sheets in the (111) planes with spins antiparallel between two neighboring planes. Neutron spectroscopy reveals strong magnetic excitations at 100 K that survive up to room temperature. This work demonstrates that entropy-stabilized oxides represent a unique platform to study long-range magnetic order with an extreme chemical disorder.

AB - We report for the first time the magnetic structure of the high entropy oxide (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O using neutron powder diffraction. This material exhibits a sluggish magnetic transition but possesses a long-range ordered antiferromagnetic ground state, as revealed by direct current and alternating current magnetic susceptibility, neutron diffraction, and spectroscopy. The magnetic propagation wavevector is k = (1/2, 1/2, 1/2) based on the cubic structure Fm3 m, and the magnetic structure consists of ferromagnetic sheets in the (111) planes with spins antiparallel between two neighboring planes. Neutron spectroscopy reveals strong magnetic excitations at 100 K that survive up to room temperature. This work demonstrates that entropy-stabilized oxides represent a unique platform to study long-range magnetic order with an extreme chemical disorder.

UR - https://www.scopus.com/pages/publications/85066855933

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85066855933&origin=recordpage

U2 - 10.1021/acs.chemmater.9b00624

DO - 10.1021/acs.chemmater.9b00624

M3 - RGC 21 - Publication in refereed journal

SN - 0897-4756

VL - 31

SP - 3705

EP - 3711

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 10

ER -

Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide

Abstract

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