Spin density wave instability in a ferromagnet

Abstract Due to its cooperative nature, magnetic ordering involves a complex interplay between spin, charge, and lattice degrees of freedom, which can lead to strong competition between magnetic states. Binary Fe3Ga4 is one such material that exhibits competing orders having a ferromagnetic (FM) gro...

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Autores principales:	Yan Wu, Zhenhua Ning, Huibo Cao, Guixin Cao, Katherine A. Benavides, S. Karna, Gregory T. McCandless, R. Jin, Julia Y. Chan, W. A. Shelton, J. F. DiTusa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/371a1f9a610e4335b9dd6110905a3303
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spelling	oai:doaj.org-article:371a1f9a610e4335b9dd6110905a33032021-12-02T15:08:07ZSpin density wave instability in a ferromagnet10.1038/s41598-018-23555-42045-2322https://doaj.org/article/371a1f9a610e4335b9dd6110905a33032018-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-23555-4https://doaj.org/toc/2045-2322Abstract Due to its cooperative nature, magnetic ordering involves a complex interplay between spin, charge, and lattice degrees of freedom, which can lead to strong competition between magnetic states. Binary Fe3Ga4 is one such material that exhibits competing orders having a ferromagnetic (FM) ground state, an antiferromagnetic (AFM) behavior at intermediate temperatures, and a conspicuous re-entrance of the FM state at high temperature. Through a combination of neutron diffraction experiments and simulations, we have discovered that the AFM state is an incommensurate spin-density wave (ISDW) ordering generated by nesting in the spin polarized Fermi surface. These two magnetic states, FM and ISDW, are seldom observed in the same material without application of a polarizing magnetic field. To date, this unusual mechanism has never been observed and its elemental origins could have far reaching implications in many other magnetic systems that contain strong competition between these types of magnetic order. Furthermore, the competition between magnetic states results in a susceptibility to external perturbations allowing the magnetic transitions in Fe3Ga4 to be controlled via temperature, magnetic field, disorder, and pressure. Thus, Fe3Ga4 has potential for application in novel magnetic memory devices, such as the magnetic components of tunneling magnetoresistance spintronics devices.Yan WuZhenhua NingHuibo CaoGuixin CaoKatherine A. BenavidesS. KarnaGregory T. McCandlessR. JinJulia Y. ChanW. A. SheltonJ. F. DiTusaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yan Wu Zhenhua Ning Huibo Cao Guixin Cao Katherine A. Benavides S. Karna Gregory T. McCandless R. Jin Julia Y. Chan W. A. Shelton J. F. DiTusa Spin density wave instability in a ferromagnet
description	Abstract Due to its cooperative nature, magnetic ordering involves a complex interplay between spin, charge, and lattice degrees of freedom, which can lead to strong competition between magnetic states. Binary Fe3Ga4 is one such material that exhibits competing orders having a ferromagnetic (FM) ground state, an antiferromagnetic (AFM) behavior at intermediate temperatures, and a conspicuous re-entrance of the FM state at high temperature. Through a combination of neutron diffraction experiments and simulations, we have discovered that the AFM state is an incommensurate spin-density wave (ISDW) ordering generated by nesting in the spin polarized Fermi surface. These two magnetic states, FM and ISDW, are seldom observed in the same material without application of a polarizing magnetic field. To date, this unusual mechanism has never been observed and its elemental origins could have far reaching implications in many other magnetic systems that contain strong competition between these types of magnetic order. Furthermore, the competition between magnetic states results in a susceptibility to external perturbations allowing the magnetic transitions in Fe3Ga4 to be controlled via temperature, magnetic field, disorder, and pressure. Thus, Fe3Ga4 has potential for application in novel magnetic memory devices, such as the magnetic components of tunneling magnetoresistance spintronics devices.
format	article
author	Yan Wu Zhenhua Ning Huibo Cao Guixin Cao Katherine A. Benavides S. Karna Gregory T. McCandless R. Jin Julia Y. Chan W. A. Shelton J. F. DiTusa
author_facet	Yan Wu Zhenhua Ning Huibo Cao Guixin Cao Katherine A. Benavides S. Karna Gregory T. McCandless R. Jin Julia Y. Chan W. A. Shelton J. F. DiTusa
author_sort	Yan Wu
title	Spin density wave instability in a ferromagnet
title_short	Spin density wave instability in a ferromagnet
title_full	Spin density wave instability in a ferromagnet
title_fullStr	Spin density wave instability in a ferromagnet
title_full_unstemmed	Spin density wave instability in a ferromagnet
title_sort	spin density wave instability in a ferromagnet
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/371a1f9a610e4335b9dd6110905a3303
work_keys_str_mv	AT yanwu spindensitywaveinstabilityinaferromagnet AT zhenhuaning spindensitywaveinstabilityinaferromagnet AT huibocao spindensitywaveinstabilityinaferromagnet AT guixincao spindensitywaveinstabilityinaferromagnet AT katherineabenavides spindensitywaveinstabilityinaferromagnet AT skarna spindensitywaveinstabilityinaferromagnet AT gregorytmccandless spindensitywaveinstabilityinaferromagnet AT rjin spindensitywaveinstabilityinaferromagnet AT juliaychan spindensitywaveinstabilityinaferromagnet AT washelton spindensitywaveinstabilityinaferromagnet AT jfditusa spindensitywaveinstabilityinaferromagnet
_version_	1718388244111949824

Spin density wave instability in a ferromagnet

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