Deterministic approach to skyrmionic dynamics at nonzero temperatures : pinning sites and racetracks
Castell-Queralt, Josep (Universitat Autònoma de Barcelona. Departament de Física)
González-Gómez, Leonardo (Universitat Autònoma de Barcelona. Departament de Física)
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física)
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física)

Date:	2020
Abstract:	The discovery of room-temperature skyrmions in some magnetic materials has boosted the investigation of their dynamics in view of future applications. We study the dynamics of skyrmions in the presence of defects or borders using a deterministic (finding and solving a deterministic Fokker-Planck differential equation) while probabilistic (the solution is the probability density for the presence of a skyrmion) approach. The probability that a skyrmion becomes trapped in a pinning center or the probability of the survival of a skyrmion along a racetrack are obtained as a function of temperature. The present work can be relevant in the design of skyrmionic devices where the probability of finding skyrmions at a given position and time is crucial for their feasibility.
Grants:	Ministerio de Economía y Competitividad MAT2016-79426-P Ministerio de Ciencia, Innovación y Universidades FPU17/01970 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-105
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Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Differential equations ; Magnetic materials ; Statistics
Published in:	Physical review B, Vol. 101, issue 14 (April 2020) , art. 140404, ISSN 2469-9969

DOI: 10.1103/PhysRevB.101.140404

5 p, 743.5 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Research articles
Articles > Published articles