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

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

141 Scopus citations

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
Number of pages	7
Journal	Chemistry of Materials
Volume	31
Issue number	10
DOIs	https://doi.org/10.1021/acs.chemmater.9b00624
State	Published - May 28 2019

Funding

This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. This research used resources at the High Flux Isotope Reactor and Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. J.Z. would like to thank Liang Wang for his help with X-ray pair distribution function data at 11-ID-C. J.Z. acknowledges the fourth “Modern Methods in Rietveld Refinement for Structural Analysis” workshop held at the Advanced Photon Source of Argonne National Laboratory in close partnership with Bruker-AXS, ANL, and the National Science Foundation. J.Z. thanks Drs. M. E. Manley, V. R. Cooper, T. Z. Ward, Y. Sharma, K. Pitike, and A. R. Mazza for fruitful discussions.

Funders	Funder number
National Science Foundation
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Argonne National Laboratory	DE-AC02-06CH11357
Division of Materials Sciences and Engineering

Access to Document

10.1021/acs.chemmater.9b00624

Cite this

@article{e3645c3411de4dd5a8e7fa72407371eb,

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 = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = may,

day = "28",

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

language = "English",

volume = "31",

pages = "3705--3711",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "10",

}

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.

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 - http://www.scopus.com/inward/record.url?scp=85066855933&partnerID=8YFLogxK

U2 - 10.1021/acs.chemmater.9b00624

DO - 10.1021/acs.chemmater.9b00624

M3 - Article

AN - SCOPUS:85066855933

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

Funding

Access to Document

Other files and links

Fingerprint

Cite this