Crystal structures and spin injection signals of Si/Mg/MgO/Co2FeAl 0.5Si0.5 junctions

Takashi Onodera, Masahiro Yoshida, Nobuki Tezuka, Masashi Matsuura, Satoshi Sugimoto, Yoshiaki Saito

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We investigated the crystal structures and the spin injection signals of Si/Mg/MgO/Co2FeAl0.5Si0.5 (CFAS) junctions deposited by molecule beam epitaxy. The (001)-orientation and the structural ordering of CFAS thin films changed by heating deposition of CFAS and the insertion of Mg layer into Si/MgO interface. Spin injection signals observed at 10K for the junctions by 3 terminals Hanle measurements. The maximum voltage change, ΔVMAX, was increased by heating deposition of CFAS and the insertion of Mg layer. It is supposed that the enhancement of spin polarization by the improvement of structural ordering of CFAS or coherent tunneling by (001)-oriented MgO barrier caused the increment of ΔV MAX.

Original languageEnglish
Pages (from-to)1392-1395
Number of pages4
JournalMaterials Transactions
Volume54
Issue number8
DOIs
Publication statusPublished - 2013 Sep 3

Keywords

  • (001)-oriented MgO
  • Heusler alloy
  • Silicon
  • Spintronics

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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