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Anomalous Hall magnetoresistance in a ferromagnet

The anomalous Hall effect, observed in conducting ferromagnets with broken time-reversal symmetry, offers the possibility to couple spin and orbital degrees of freedom of electrons in ferromagnets. In addition to charge, the anomalous Hall effect also leads to spin accumulation at the surfaces perpe...

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Autores principales: Yang, Yumeng, Luo, Ziyan, Wu, Haijun, Xu, Yanjun, Li, Run-Wei, Pennycook, Stephen J., Zhang, Shufeng, Wu, Yihong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993777/
https://www.ncbi.nlm.nih.gov/pubmed/29884868
http://dx.doi.org/10.1038/s41467-018-04712-9
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author Yang, Yumeng
Luo, Ziyan
Wu, Haijun
Xu, Yanjun
Li, Run-Wei
Pennycook, Stephen J.
Zhang, Shufeng
Wu, Yihong
author_facet Yang, Yumeng
Luo, Ziyan
Wu, Haijun
Xu, Yanjun
Li, Run-Wei
Pennycook, Stephen J.
Zhang, Shufeng
Wu, Yihong
author_sort Yang, Yumeng
collection PubMed
description The anomalous Hall effect, observed in conducting ferromagnets with broken time-reversal symmetry, offers the possibility to couple spin and orbital degrees of freedom of electrons in ferromagnets. In addition to charge, the anomalous Hall effect also leads to spin accumulation at the surfaces perpendicular to both the current and magnetization direction. Here, we experimentally demonstrate that the spin accumulation, subsequent spin backflow, and spin–charge conversion can give rise to a different type of spin current-related spin current related magnetoresistance, dubbed here as the anomalous Hall magnetoresistance, which has the same angular dependence as the recently discovered spin Hall magnetoresistance. The anomalous Hall magnetoresistance is observed in four types of samples: co-sputtered (Fe(1−x)Mn(x))(0.6)Pt(0.4), Fe(1−x)Mn(x)/Pt multilayer, Fe(1−x)Mn(x) with x = 0.17–0.65 and Fe, and analyzed using the drift-diffusion model. Our results provide an alternative route to study charge–spin conversion in ferromagnets and to exploit it for potential spintronic applications.
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spelling pubmed-59937772018-06-11 Anomalous Hall magnetoresistance in a ferromagnet Yang, Yumeng Luo, Ziyan Wu, Haijun Xu, Yanjun Li, Run-Wei Pennycook, Stephen J. Zhang, Shufeng Wu, Yihong Nat Commun Article The anomalous Hall effect, observed in conducting ferromagnets with broken time-reversal symmetry, offers the possibility to couple spin and orbital degrees of freedom of electrons in ferromagnets. In addition to charge, the anomalous Hall effect also leads to spin accumulation at the surfaces perpendicular to both the current and magnetization direction. Here, we experimentally demonstrate that the spin accumulation, subsequent spin backflow, and spin–charge conversion can give rise to a different type of spin current-related spin current related magnetoresistance, dubbed here as the anomalous Hall magnetoresistance, which has the same angular dependence as the recently discovered spin Hall magnetoresistance. The anomalous Hall magnetoresistance is observed in four types of samples: co-sputtered (Fe(1−x)Mn(x))(0.6)Pt(0.4), Fe(1−x)Mn(x)/Pt multilayer, Fe(1−x)Mn(x) with x = 0.17–0.65 and Fe, and analyzed using the drift-diffusion model. Our results provide an alternative route to study charge–spin conversion in ferromagnets and to exploit it for potential spintronic applications. Nature Publishing Group UK 2018-06-08 /pmc/articles/PMC5993777/ /pubmed/29884868 http://dx.doi.org/10.1038/s41467-018-04712-9 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yang, Yumeng
Luo, Ziyan
Wu, Haijun
Xu, Yanjun
Li, Run-Wei
Pennycook, Stephen J.
Zhang, Shufeng
Wu, Yihong
Anomalous Hall magnetoresistance in a ferromagnet
title Anomalous Hall magnetoresistance in a ferromagnet
title_full Anomalous Hall magnetoresistance in a ferromagnet
title_fullStr Anomalous Hall magnetoresistance in a ferromagnet
title_full_unstemmed Anomalous Hall magnetoresistance in a ferromagnet
title_short Anomalous Hall magnetoresistance in a ferromagnet
title_sort anomalous hall magnetoresistance in a ferromagnet
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993777/
https://www.ncbi.nlm.nih.gov/pubmed/29884868
http://dx.doi.org/10.1038/s41467-018-04712-9
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