Magnetism and magnetoresistance in the critical region of a dilute ferromagnet

We present detailed experimental measurements and simulations of the field-dependent magnetization and magnetoresistance in the vicinity of the Curie temperature in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. The observed dependence of the magnetization on external magnetic f...

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Autores principales: Wang, M., Howells, B., Marshall, R. A., Taylor, J. M., Edmonds, K. W., Rushforth, A. W., Campion, R. P., Gallagher, B. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7840979/
https://www.ncbi.nlm.nih.gov/pubmed/33504875
http://dx.doi.org/10.1038/s41598-021-81893-2
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author Wang, M.
Howells, B.
Marshall, R. A.
Taylor, J. M.
Edmonds, K. W.
Rushforth, A. W.
Campion, R. P.
Gallagher, B. L.
author_facet Wang, M.
Howells, B.
Marshall, R. A.
Taylor, J. M.
Edmonds, K. W.
Rushforth, A. W.
Campion, R. P.
Gallagher, B. L.
author_sort Wang, M.
collection PubMed
description We present detailed experimental measurements and simulations of the field-dependent magnetization and magnetoresistance in the vicinity of the Curie temperature in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. The observed dependence of the magnetization on external magnetic field and temperature is consistent with three-dimensional Heisenberg equation of state calculations including a narrow distribution of critical temperatures. The magnetoresistance shows a peak at the Curie temperature due to the suppression of magnetic scattering in an applied magnetic field, which is well-described by considering changes in the square of the magnetization induced by the magnetic field.
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spelling pubmed-78409792021-01-28 Magnetism and magnetoresistance in the critical region of a dilute ferromagnet Wang, M. Howells, B. Marshall, R. A. Taylor, J. M. Edmonds, K. W. Rushforth, A. W. Campion, R. P. Gallagher, B. L. Sci Rep Article We present detailed experimental measurements and simulations of the field-dependent magnetization and magnetoresistance in the vicinity of the Curie temperature in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. The observed dependence of the magnetization on external magnetic field and temperature is consistent with three-dimensional Heisenberg equation of state calculations including a narrow distribution of critical temperatures. The magnetoresistance shows a peak at the Curie temperature due to the suppression of magnetic scattering in an applied magnetic field, which is well-described by considering changes in the square of the magnetization induced by the magnetic field. Nature Publishing Group UK 2021-01-27 /pmc/articles/PMC7840979/ /pubmed/33504875 http://dx.doi.org/10.1038/s41598-021-81893-2 Text en © The Author(s) 2021 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wang, M.
Howells, B.
Marshall, R. A.
Taylor, J. M.
Edmonds, K. W.
Rushforth, A. W.
Campion, R. P.
Gallagher, B. L.
Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
title Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
title_full Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
title_fullStr Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
title_full_unstemmed Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
title_short Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
title_sort magnetism and magnetoresistance in the critical region of a dilute ferromagnet
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7840979/
https://www.ncbi.nlm.nih.gov/pubmed/33504875
http://dx.doi.org/10.1038/s41598-021-81893-2
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