Synthesis of metastable B2-type Fe-Sn alloy epitaxial films and study of their magnetic properties

Yuki Goto, Masato Araki, Nozomi Takahashi, Takashi Yanase, Toshihiro Shimada, Masahito Tsujikawa, Masafumi Shirai, Akira Kamimaki, Satoshi Iihama, Shigemi Mizukami, Taro Nagahama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The metastable phases of Fe1- x Sn x alloys were stabilized by their epitaxial growth on MgO(100). The Fe1- x Sn x alloys with a body-centered-cubic-based structure were realized in the range of 0 ≤ x ≤ 0.4. For x = 0.25, the B2 structure was observed by transmission electron microscopy and X-ray diffraction analysis, although the hexagonal D019 structure was a thermodynamically stable phase. With respect to magnetic properties, all the compositions show similar hysteresis curves except for x = 0.25. According to ab initio calculations, D03-Fe3Sn and B2-Fe3Sn have band structures similar to that of Fe, which results in a large tunnel magnetoresistance by coherent tunneling.

Original languageEnglish
Article number120302
JournalJapanese journal of applied physics
Volume57
Issue number12
DOIs
Publication statusPublished - 2018 Dec

ASJC Scopus subject areas

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

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