Persistent spin current in mesoscopic ferrimagnetic spin ring

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Title:	Persistent spin current in mesoscopic ferrimagnetic spin ring
Authors:	Wu, J.-N.a, Chang, M.-C.a, Yang, M.-F.b
Contributors:	Department of Physics, Tunghai University
Date:	2005
Issue Date:	2013-05-14T09:05:32Z (UTC)
Abstract:	Using a semiclassical approach, we study the persistent magnetization current of a mesoscopic ferrimagnetic ring in a nonuniform magnetic field. At zero temperature, there exists persistent spin current because of the quantum fluctuation of magnons, similar to the case of an antiferromagnetic spin ring. At a low temperature, the current shows activation behavior because of the field-induced gap. At a higher temperature, the magnitude of the spin current is proportional to temperature T, similar to the reported result of a ferromagnetic spin ring. ? 2005 The American Physical Society.
Relation:	Physical Review B - Condensed Matter and Materials Physics Volume 72, Issue 17, 1 November 2005, Article number172405
Appears in Collections:	[Department of Applied Physics] Periodical Articles

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