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Electrically induced and detected Néel vector reversal in a collinear antiferromagnet

Antiferromagnets are enriching spintronics research by many favorable properties that include insensitivity to magnetic fields, neuromorphic memory characteristics, and ultra-fast spin dynamics. Designing memory devices with electrical writing and reading is one of the central topics of antiferromag...

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Autores principales: Godinho, J., Reichlová, H., Kriegner, D., Novák, V., Olejník, K., Kašpar, Z., Šobáň, Z., Wadley, P., Campion, R. P., Otxoa, R. M., Roy, P. E., Železný, J., Jungwirth, T., Wunderlich, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6224378/
https://www.ncbi.nlm.nih.gov/pubmed/30409971
http://dx.doi.org/10.1038/s41467-018-07092-2
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author Godinho, J.
Reichlová, H.
Kriegner, D.
Novák, V.
Olejník, K.
Kašpar, Z.
Šobáň, Z.
Wadley, P.
Campion, R. P.
Otxoa, R. M.
Roy, P. E.
Železný, J.
Jungwirth, T.
Wunderlich, J.
author_facet Godinho, J.
Reichlová, H.
Kriegner, D.
Novák, V.
Olejník, K.
Kašpar, Z.
Šobáň, Z.
Wadley, P.
Campion, R. P.
Otxoa, R. M.
Roy, P. E.
Železný, J.
Jungwirth, T.
Wunderlich, J.
author_sort Godinho, J.
collection PubMed
description Antiferromagnets are enriching spintronics research by many favorable properties that include insensitivity to magnetic fields, neuromorphic memory characteristics, and ultra-fast spin dynamics. Designing memory devices with electrical writing and reading is one of the central topics of antiferromagnetic spintronics. So far, such a combined functionality has been demonstrated via 90° reorientations of the Néel vector generated by the current-induced spin orbit torque and sensed by the linear-response anisotropic magnetoresistance. Here we show that in the same antiferromagnetic CuMnAs films as used in these earlier experiments we can also control 180° Néel vector reversals by switching the polarity of the writing current. Moreover, the two stable states with opposite Néel vector orientations in this collinear antiferromagnet can be electrically distinguished by measuring a second-order magnetoresistance effect. We discuss the general magnetic point group symmetries allowing for this electrical readout effect and its specific microscopic origin in CuMnAs.
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spelling pubmed-62243782018-11-13 Electrically induced and detected Néel vector reversal in a collinear antiferromagnet Godinho, J. Reichlová, H. Kriegner, D. Novák, V. Olejník, K. Kašpar, Z. Šobáň, Z. Wadley, P. Campion, R. P. Otxoa, R. M. Roy, P. E. Železný, J. Jungwirth, T. Wunderlich, J. Nat Commun Article Antiferromagnets are enriching spintronics research by many favorable properties that include insensitivity to magnetic fields, neuromorphic memory characteristics, and ultra-fast spin dynamics. Designing memory devices with electrical writing and reading is one of the central topics of antiferromagnetic spintronics. So far, such a combined functionality has been demonstrated via 90° reorientations of the Néel vector generated by the current-induced spin orbit torque and sensed by the linear-response anisotropic magnetoresistance. Here we show that in the same antiferromagnetic CuMnAs films as used in these earlier experiments we can also control 180° Néel vector reversals by switching the polarity of the writing current. Moreover, the two stable states with opposite Néel vector orientations in this collinear antiferromagnet can be electrically distinguished by measuring a second-order magnetoresistance effect. We discuss the general magnetic point group symmetries allowing for this electrical readout effect and its specific microscopic origin in CuMnAs. Nature Publishing Group UK 2018-11-08 /pmc/articles/PMC6224378/ /pubmed/30409971 http://dx.doi.org/10.1038/s41467-018-07092-2 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
Godinho, J.
Reichlová, H.
Kriegner, D.
Novák, V.
Olejník, K.
Kašpar, Z.
Šobáň, Z.
Wadley, P.
Campion, R. P.
Otxoa, R. M.
Roy, P. E.
Železný, J.
Jungwirth, T.
Wunderlich, J.
Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
title Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
title_full Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
title_fullStr Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
title_full_unstemmed Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
title_short Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
title_sort electrically induced and detected néel vector reversal in a collinear antiferromagnet
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6224378/
https://www.ncbi.nlm.nih.gov/pubmed/30409971
http://dx.doi.org/10.1038/s41467-018-07092-2
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