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No.2(pp.53-100)

Home > Issues > Volume 14 (2009) > No.2(pp.53-100)

Current-induced Spin Wave Excitations in Asymmetric Nanopillar Junctions

Journal of Magnetics, Volume 14, Number 2, 30 Jun 2009, Pages 90-92

Arie Fiandimas(Center for Spintronics Research, KIST), Kyung Jin Lee(Department of Materials Science and Engineering, Korea University), Kyung-Ho Shin*

(Center for Spintronics Research, KIST)

Abstract

This study examined the current-induced spin wave excitation in asymmetric nanopillar junctions with a stack sequence of 20 nm Pt/10 nm Cu/7 nm NiFe/300 nm Cu, and a circular lateral dimension of 240 nm. An analysis of the magnetic and magnetotransport characteristics of the junction showed a possible spin transfer effect at this sample dimension when the magnetization was switched from a vortex state to another state. This finding is expected to help improve the understanding of the spin transfer torque phenomenon in nanopillar junctions.

Keywords: nanopillar; magnetotransport; spin transfer torque; spin wave exitation

DOI: 10.4283/JMAG.2009.14.2.90

Full Text: PDF

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