Enhanced magnetoresistance induced by spin transfer torque in granular films with a magnetic field

Tingyong Chen, S. X. Huang, C. L. Chien, M. D. Stiles

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Spin-transfer torques (STT) provide a mechanism to alter the magnetic configurations of magnetic heterostructures, a result previously only achieved by an external magnetic field. In granular solids, we demonstrate a new form of STT effect that can be exploited to induce a large spin disorder when combined with a large magnetic field. We have obtained a very large magnetoresistance effect in excess of 400% at 4.2 K in a large magnetic field, the largest ever reported in any metallic systems. The STT characteristics of granular solids differ significantly from those of multilayers, showing no STT effect at low magnetic fields but prominent STT effects at high fields.

Original languageEnglish (US)
Article number207203
JournalPhysical Review Letters
Volume96
Issue number20
DOIs
StatePublished - 2006
Externally publishedYes

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torque
magnetic fields
disorders
configurations

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Enhanced magnetoresistance induced by spin transfer torque in granular films with a magnetic field. / Chen, Tingyong; Huang, S. X.; Chien, C. L.; Stiles, M. D.

In: Physical Review Letters, Vol. 96, No. 20, 207203, 2006.

Research output: Contribution to journalArticle

Chen, Tingyong ; Huang, S. X. ; Chien, C. L. ; Stiles, M. D. / Enhanced magnetoresistance induced by spin transfer torque in granular films with a magnetic field. In: Physical Review Letters. 2006 ; Vol. 96, No. 20.
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