Magnetic moment of inertia within the torque-torque correlation model

Abstract An essential property of magnetic devices is the relaxation rate in magnetic switching which strongly depends on the energy dissipation. This is described by the Landau-Lifshitz-Gilbert equation and the well known damping parameter, which has been shown to be reproduced from quantum mechani...

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Autores principales:	Danny Thonig, Olle Eriksson, Manuel Pereiro
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a28a753259d44971bde1e0b43cca6b37
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spelling	oai:doaj.org-article:a28a753259d44971bde1e0b43cca6b372021-12-02T15:05:17ZMagnetic moment of inertia within the torque-torque correlation model10.1038/s41598-017-01081-z2045-2322https://doaj.org/article/a28a753259d44971bde1e0b43cca6b372017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01081-zhttps://doaj.org/toc/2045-2322Abstract An essential property of magnetic devices is the relaxation rate in magnetic switching which strongly depends on the energy dissipation. This is described by the Landau-Lifshitz-Gilbert equation and the well known damping parameter, which has been shown to be reproduced from quantum mechanical calculations. Recently the importance of inertia phenomena have been discussed for magnetisation dynamics. This magnetic counterpart to the well-known inertia of Newtonian mechanics, represents a research field that so far has received only limited attention. We present and elaborate here on a theoretical model for calculating the magnetic moment of inertia based on the torque-torque correlation model. Particularly, the method has been applied to bulk itinerant magnets and we show that numerical values are comparable with recent experimental measurements. The theoretical analysis shows that even though the moment of inertia and damping are produced by the spin-orbit coupling, and the expression for them have common features, they are caused by very different electronic structure mechanisms. We propose ways to utilise this in order to tune the inertia experimentally, and to find materials with significant inertia dynamics.Danny ThonigOlle ErikssonManuel PereiroNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Danny Thonig Olle Eriksson Manuel Pereiro Magnetic moment of inertia within the torque-torque correlation model
description	Abstract An essential property of magnetic devices is the relaxation rate in magnetic switching which strongly depends on the energy dissipation. This is described by the Landau-Lifshitz-Gilbert equation and the well known damping parameter, which has been shown to be reproduced from quantum mechanical calculations. Recently the importance of inertia phenomena have been discussed for magnetisation dynamics. This magnetic counterpart to the well-known inertia of Newtonian mechanics, represents a research field that so far has received only limited attention. We present and elaborate here on a theoretical model for calculating the magnetic moment of inertia based on the torque-torque correlation model. Particularly, the method has been applied to bulk itinerant magnets and we show that numerical values are comparable with recent experimental measurements. The theoretical analysis shows that even though the moment of inertia and damping are produced by the spin-orbit coupling, and the expression for them have common features, they are caused by very different electronic structure mechanisms. We propose ways to utilise this in order to tune the inertia experimentally, and to find materials with significant inertia dynamics.
format	article
author	Danny Thonig Olle Eriksson Manuel Pereiro
author_facet	Danny Thonig Olle Eriksson Manuel Pereiro
author_sort	Danny Thonig
title	Magnetic moment of inertia within the torque-torque correlation model
title_short	Magnetic moment of inertia within the torque-torque correlation model
title_full	Magnetic moment of inertia within the torque-torque correlation model
title_fullStr	Magnetic moment of inertia within the torque-torque correlation model
title_full_unstemmed	Magnetic moment of inertia within the torque-torque correlation model
title_sort	magnetic moment of inertia within the torque-torque correlation model
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a28a753259d44971bde1e0b43cca6b37
work_keys_str_mv	AT dannythonig magneticmomentofinertiawithinthetorquetorquecorrelationmodel AT olleeriksson magneticmomentofinertiawithinthetorquetorquecorrelationmodel AT manuelpereiro magneticmomentofinertiawithinthetorquetorquecorrelationmodel
_version_	1718388911522185216

Magnetic moment of inertia within the torque-torque correlation model

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