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Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn
Spin-orbit torque (SOT) offers promising approaches to developing energy-efficient memory devices by electric switching of magnetization. Compared to other SOT materials, metallic antiferromagnet (AFM) potentially allows the control of SOT through its magnetic structure. Here, combining the results...
Autores principales: | , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6510556/ https://www.ncbi.nlm.nih.gov/pubmed/31093522 http://dx.doi.org/10.1126/sciadv.aau6696 |
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author | Zhou, Jing Wang, Xiao Liu, Yaohua Yu, Jihang Fu, Huixia Liu, Liang Chen, Shaohai Deng, Jinyu Lin, Weinan Shu, Xinyu Yoong, Herng Yau Hong, Tao Matsuda, Masaaki Yang, Ping Adams, Stefan Yan, Binghai Han, Xiufeng Chen, Jingsheng |
author_facet | Zhou, Jing Wang, Xiao Liu, Yaohua Yu, Jihang Fu, Huixia Liu, Liang Chen, Shaohai Deng, Jinyu Lin, Weinan Shu, Xinyu Yoong, Herng Yau Hong, Tao Matsuda, Masaaki Yang, Ping Adams, Stefan Yan, Binghai Han, Xiufeng Chen, Jingsheng |
author_sort | Zhou, Jing |
collection | PubMed |
description | Spin-orbit torque (SOT) offers promising approaches to developing energy-efficient memory devices by electric switching of magnetization. Compared to other SOT materials, metallic antiferromagnet (AFM) potentially allows the control of SOT through its magnetic structure. Here, combining the results from neutron diffraction and spin-torque ferromagnetic resonance experiments, we show that the magnetic structure of epitaxially grown L1(0)-IrMn (a collinear AFM) is distinct from the widely presumed bulk one. It consists of twin domains, with the spin axes orienting toward [111] and [−111], respectively. This unconventional magnetic structure is responsible for much larger SOT efficiencies up to 0.60 ± 0.04, compared to 0.083 ± 0.002 for the polycrystalline IrMn. Furthermore, we reveal that this magnetic structure induces a large isotropic bulk contribution and a comparable anisotropic interfacial contribution to the SOT efficiency. Our findings shed light on the critical roles of bulk and interfacial antiferromagnetism to SOT generated by metallic AFM. |
format | Online Article Text |
id | pubmed-6510556 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-65105562019-05-15 Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn Zhou, Jing Wang, Xiao Liu, Yaohua Yu, Jihang Fu, Huixia Liu, Liang Chen, Shaohai Deng, Jinyu Lin, Weinan Shu, Xinyu Yoong, Herng Yau Hong, Tao Matsuda, Masaaki Yang, Ping Adams, Stefan Yan, Binghai Han, Xiufeng Chen, Jingsheng Sci Adv Research Articles Spin-orbit torque (SOT) offers promising approaches to developing energy-efficient memory devices by electric switching of magnetization. Compared to other SOT materials, metallic antiferromagnet (AFM) potentially allows the control of SOT through its magnetic structure. Here, combining the results from neutron diffraction and spin-torque ferromagnetic resonance experiments, we show that the magnetic structure of epitaxially grown L1(0)-IrMn (a collinear AFM) is distinct from the widely presumed bulk one. It consists of twin domains, with the spin axes orienting toward [111] and [−111], respectively. This unconventional magnetic structure is responsible for much larger SOT efficiencies up to 0.60 ± 0.04, compared to 0.083 ± 0.002 for the polycrystalline IrMn. Furthermore, we reveal that this magnetic structure induces a large isotropic bulk contribution and a comparable anisotropic interfacial contribution to the SOT efficiency. Our findings shed light on the critical roles of bulk and interfacial antiferromagnetism to SOT generated by metallic AFM. American Association for the Advancement of Science 2019-05-10 /pmc/articles/PMC6510556/ /pubmed/31093522 http://dx.doi.org/10.1126/sciadv.aau6696 Text en Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Zhou, Jing Wang, Xiao Liu, Yaohua Yu, Jihang Fu, Huixia Liu, Liang Chen, Shaohai Deng, Jinyu Lin, Weinan Shu, Xinyu Yoong, Herng Yau Hong, Tao Matsuda, Masaaki Yang, Ping Adams, Stefan Yan, Binghai Han, Xiufeng Chen, Jingsheng Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn |
title | Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn |
title_full | Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn |
title_fullStr | Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn |
title_full_unstemmed | Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn |
title_short | Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn |
title_sort | large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet irmn |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6510556/ https://www.ncbi.nlm.nih.gov/pubmed/31093522 http://dx.doi.org/10.1126/sciadv.aau6696 |
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