Persistent spin current in mesoscopic ferrimagnetic spin ring

Jing Nuo Wu, Ming Che Chang, Min Fong Yang

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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.

Original languageEnglish
Article number172405
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number17
DOIs
Publication statusPublished - 2005 Nov 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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