Magnetism and magnetoresistance in the critical region of a dilute ferromagnet

Abstract 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 m...

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Autores principales:	M. Wang, B. Howells, R. A. Marshall, J. M. Taylor, K. W. Edmonds, A. W. Rushforth, R. P. Campion, B. L. Gallagher
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a0f42c0a23574e16b56378a85e775695
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spelling	oai:doaj.org-article:a0f42c0a23574e16b56378a85e7756952021-12-02T14:16:26ZMagnetism and magnetoresistance in the critical region of a dilute ferromagnet10.1038/s41598-021-81893-22045-2322https://doaj.org/article/a0f42c0a23574e16b56378a85e7756952021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81893-2https://doaj.org/toc/2045-2322Abstract 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.M. WangB. HowellsR. A. MarshallJ. M. TaylorK. W. EdmondsA. W. RushforthR. P. CampionB. L. GallagherNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Wang B. Howells R. A. Marshall J. M. Taylor K. W. Edmonds A. W. Rushforth R. P. Campion B. L. Gallagher Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
description	Abstract 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.
format	article
author	M. Wang B. Howells R. A. Marshall J. M. Taylor K. W. Edmonds A. W. Rushforth R. P. Campion B. L. Gallagher
author_facet	M. Wang B. Howells R. A. Marshall J. M. Taylor K. W. Edmonds A. W. Rushforth R. P. Campion B. L. Gallagher
author_sort	M. Wang
title	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_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_sort	magnetism and magnetoresistance in the critical region of a dilute ferromagnet
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a0f42c0a23574e16b56378a85e775695
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Magnetism and magnetoresistance in the critical region of a dilute ferromagnet

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