Magnetization and Spin Polarization of Heusler Alloys Co2TiSn and Co2 TiGa0.5Sn0.5

Ryutaro Ooka, Iduru Shigeta, Yoshimi Sukino, Yutaro Fujimoto, Rie Y. Umetsu, Yoshio Miura, Akiko Nomura, Kunio Yubuta, Touru Yamauchi, Takeshi Kanomata, Masahiko Hiroi

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4 Citations (Scopus)

Abstract

The substitution effect on half-metallicity for Co-based Heusler alloys Co2TiGa1-x Snx was investigated by experimental measurements and first-principles band calculations. The synthesized alloys crystalized in the ordered L21 crystal structure. The spontaneous magnetization obeyed the Slater-Pauling rule, indicating the possibility that Co2TiSn and Co2TiGa0.5Sn0.5 are half-metals. The first-principles band calculations revealed that Co2TiSn is half-metal and Co2TiGa0.5Sn0.5 is nearly half-metal. The spin polarization P was determined by the Andreev reflection technique. The intrinsic P values were 58.9% for Co2TiSn and 58.2% for Co2TiGa0.5 Sn0.5, respectively. The P values of Co2TiGa1-xSnx were relatively higher than other Co-based Heusler alloys. Thus, Co-based Heusler alloys Co2TiGa1-xSnx are possible candidates for half-metallic electrode materials in spintronic devices.

Original languageEnglish
Article number7726041
JournalIEEE Magnetics Letters
Volume8
DOIs
Publication statusPublished - 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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