Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination

We report the observation of exchange bias in a ferromagnetic Ga(0.94)Mn(0.06)As(0.77)P(0.23)/ Ga(0.94)Mn(0.06)As bilayer, in which the easy axis in one layer is oriented out-of-plane, and in the other in-plane. Magnetization reversal in this system is explored using planar Hall effect (PHE) measure...

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Autores principales: Choi, Suho, Bac, Seul-Ki, Liu, Xinyu, Lee, Sanghoon, Dong, Sining, Dobrowolska, M., Furdyna, J. K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6736936/
https://www.ncbi.nlm.nih.gov/pubmed/31506578
http://dx.doi.org/10.1038/s41598-019-49492-4
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author Choi, Suho
Bac, Seul-Ki
Liu, Xinyu
Lee, Sanghoon
Dong, Sining
Dobrowolska, M.
Furdyna, J. K.
author_facet Choi, Suho
Bac, Seul-Ki
Liu, Xinyu
Lee, Sanghoon
Dong, Sining
Dobrowolska, M.
Furdyna, J. K.
author_sort Choi, Suho
collection PubMed
description We report the observation of exchange bias in a ferromagnetic Ga(0.94)Mn(0.06)As(0.77)P(0.23)/ Ga(0.94)Mn(0.06)As bilayer, in which the easy axis in one layer is oriented out-of-plane, and in the other in-plane. Magnetization reversal in this system is explored using planar Hall effect (PHE) measurements under various initial conditions and with various field-cooling orientations. Our results show that the two magnetic layers are ferromagnetically exchange-coupled, and that such coupling results in pronounced exchange-bias-like shifts of magnetic hysteresis loops during reversal of in-plane magnetization. The presence of exchange bias in this system can be understood on the basis of magnetic closure domains formed in the layer with the out-of-plane easy axis.
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spelling pubmed-67369362019-09-20 Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination Choi, Suho Bac, Seul-Ki Liu, Xinyu Lee, Sanghoon Dong, Sining Dobrowolska, M. Furdyna, J. K. Sci Rep Article We report the observation of exchange bias in a ferromagnetic Ga(0.94)Mn(0.06)As(0.77)P(0.23)/ Ga(0.94)Mn(0.06)As bilayer, in which the easy axis in one layer is oriented out-of-plane, and in the other in-plane. Magnetization reversal in this system is explored using planar Hall effect (PHE) measurements under various initial conditions and with various field-cooling orientations. Our results show that the two magnetic layers are ferromagnetically exchange-coupled, and that such coupling results in pronounced exchange-bias-like shifts of magnetic hysteresis loops during reversal of in-plane magnetization. The presence of exchange bias in this system can be understood on the basis of magnetic closure domains formed in the layer with the out-of-plane easy axis. Nature Publishing Group UK 2019-09-10 /pmc/articles/PMC6736936/ /pubmed/31506578 http://dx.doi.org/10.1038/s41598-019-49492-4 Text en © The Author(s) 2019 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
Choi, Suho
Bac, Seul-Ki
Liu, Xinyu
Lee, Sanghoon
Dong, Sining
Dobrowolska, M.
Furdyna, J. K.
Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination
title Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination
title_full Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination
title_fullStr Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination
title_full_unstemmed Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination
title_short Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination
title_sort exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of gamnasp/gamnas combination
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6736936/
https://www.ncbi.nlm.nih.gov/pubmed/31506578
http://dx.doi.org/10.1038/s41598-019-49492-4
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