Asymmetric nonlinear differential resistance of mesoscopic aufe spin-glass wires

J. Eom, G. Neuttiens, C. Strunk, C. Van Haesendonck, Y. Bruynseraede, V. Chandrasekhar

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We have measured the differential resistance R = dV/dI of mesoscopic AuFe wires as a function of temperature T and dc current bias I.R(T) shows a maximum at a temperature Tm ∼1−4K, consistent with the onset of spin-glass order in these films. At temperatures T < Tm, R(I) also shows a maximum; however, R(I) is asymmetric in I, the asymmetry increasing with decreasing temperature. The asymmetry is sample specific, sensitive to the four terminal measurement configuration, and is associated with the presence of magnetic impurities in the samples.

Original languageEnglish (US)
Pages (from-to)2276-2279
Number of pages4
JournalPhysical review letters
Volume77
Issue number11
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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