Quenching of Magnetoresistance by Hot Electrons in Magnetic Tunnel Junctions

S. Zhang, P. M. Levy, A. C. Marley, S. S.P. Parkin

Research output: Contribution to journalArticle

446 Scopus citations

Abstract

A zero bias anomaly is observed at low temperatures in the current-voltage characteristics of ferromagnetic tunnel junctions; the drop in the junction resistance with increasing bias voltage is greater for antiparallel alignment of the magnetic moments of the magnetic electrodes than for parallel alignment. The resulting decrease in the magnetoresistance of the junction is accounted for by spin excitations localized at the interfaces between the magnetic electrodes and the tunnel barrier.

Original languageEnglish (US)
Pages (from-to)3744-3747
Number of pages4
JournalPhysical review letters
Volume79
Issue number19
DOIs
StatePublished - Nov 10 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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