Site disorder in Co2 Fe (Al,Si) Heusler alloys and its influence on junction tunnel magnetoresistance

K. Inomata, M. Wojcik, E. Jedryka, N. Ikeda, Nobuki Tezuka

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

The local structures around Co atoms in Co2 FeSi1-x Alx (x=0, 0.5, and 1.0) Heusler alloys have been investigated using C 59 o NMR spin-echo method and their effect on the tunneling magnetoresistance for the junctions using Co2 FeSi0.5 Al0.5 electrodes has been discussed. The C 59 o NMR spectra of the Heusler alloys are extremely sensitive to the site disorder and clearly distinguish among the A2, B2, and L 21 structures providing quantitative information on the amount of disorder. The tunnel magnetoresistance for the junctions is demonstrated to be sensitive to the site disorder in Co2 FeSi0.5 Al0.5 electrodes.

Original languageEnglish
Article number214425
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number21
DOIs
Publication statusPublished - 2008 Jun 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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