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 Fm3m, 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.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1513391
- Alternate Identifier(s):
- OSTI ID: 1529267
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chemistry of Materials
- Additional Journal Information:
- Journal Volume: 31; Journal Issue: 10; Journal ID: ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Zhang, Junjie, Yan, Jiaqiang, Calder, Stuart A., Zheng, Qiang, McGuire, Michael A., Abernathy, Douglas L., Ren, Yang, Lapidus, Saul H., Page, Katharine L., Zheng, Hong, Freeland, John W., Budai, John D., and Hermann, Raphael P. Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide. United States: N. p., 2019.
Web. doi:10.1021/acs.chemmater.9b00624.
Zhang, Junjie, Yan, Jiaqiang, Calder, Stuart A., Zheng, Qiang, McGuire, Michael A., Abernathy, Douglas L., Ren, Yang, Lapidus, Saul H., Page, Katharine L., Zheng, Hong, Freeland, John W., Budai, John D., & Hermann, Raphael P. Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide. United States. https://doi.org/10.1021/acs.chemmater.9b00624
Zhang, Junjie, Yan, Jiaqiang, Calder, Stuart A., Zheng, Qiang, McGuire, Michael A., Abernathy, Douglas L., Ren, Yang, Lapidus, Saul H., Page, Katharine L., Zheng, Hong, Freeland, John W., Budai, John D., and Hermann, Raphael P. Fri .
"Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide". United States. https://doi.org/10.1021/acs.chemmater.9b00624. https://www.osti.gov/servlets/purl/1513391.
@article{osti_1513391,
title = {Long-Range Antiferromagnetic Order in a Rocksalt High Entropy Oxide},
author = {Zhang, Junjie and Yan, Jiaqiang and Calder, Stuart A. and Zheng, Qiang and McGuire, Michael A. and Abernathy, Douglas L. and Ren, Yang and Lapidus, Saul H. and Page, Katharine L. and Zheng, Hong and Freeland, John W. and Budai, John D. and Hermann, Raphael P.},
abstractNote = {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 Fm3m, 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.},
doi = {10.1021/acs.chemmater.9b00624},
journal = {Chemistry of Materials},
number = 10,
volume = 31,
place = {United States},
year = {2019},
month = {4}
}
Web of Science
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