Tunnel magnetoresistance effect and magnetic damping in half-metallic Heusler alloys

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19 Citations (Scopus)

Abstract

Some full-Heusler alloys, such as Co2MnSi and Co 2MnGe, are expected to be half-metallic ferromagnetic material, which has complete spin polarization. They are the most promising materials for realizing half-metallicity at room temperature owing to their high Curie temperature. We demonstrate a huge tunnel magnetoresistance effect in a magnetic tunnel junction using a Co2MnSi Heusler alloy electrode. This result proves high spin polarization of the Heusler alloy. We also demonstrate a small magnetic damping constant in Co2FeAl epitaxial film. The very high spin polarization and small magnetic constant of Heusler alloys will be a great advantage for future spintronic device applications.

Original languageEnglish
Pages (from-to)3037-3053
Number of pages17
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume369
Issue number1948
DOIs
Publication statusPublished - 2011 Aug 13

Keywords

  • Half-metal
  • Heusler alloy
  • Magnetic damping
  • Tunnel magnetoresistance

ASJC Scopus subject areas

  • Mathematics(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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