Magnetization of Quaternary Heusler Alloy CoFeCrAl

Soichiro Tsujikawa, Iduru Shigeta, Jun Gouchi, Takeshi Kanomata, Rie Y. Umetsu, Yoshiya Uwatoko, Masahiko Hiroi

Research output: Contribution to journalArticlepeer-review

Abstract

We report the magnetovolume effect of quaternary Heusler alloy CoFeCrAl as a potential candidate of spin gapless semiconductor. The crystal structure of CoFeCrAl was confirmed as the single phase of the ordered LiMgPdSn-type structure. From magnetization measurements at ambient pressure, the Curie temperature TC and the spontaneous magnetization Ms were determined to be 575.2 K and 2.01 μ B/f.u., respectively. The TC is higher enough than room temperature and the Ms follows the Slater-Pauling rule. High-pressure magnetization measurements showed that the Ms is almost independent of applying pressures not only at 10 K but also up to 300 K, exhibiting that the electronic state of CoFeCrAl is fully spin polarized and it is preserved even at 300 K. The experimental results reveal that the quaternary Heusler alloy CoFeCrAl is an attractive material for functional electrode ferromagnets in spintronics devices.

Original languageEnglish
JournalIEEE Transactions on Magnetics
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • half metal
  • Magnetic moments
  • Magnetic semiconductors
  • Magnetization
  • magnetovolume effect
  • Metals
  • quaternary Heusler alloy
  • spin gapless semiconductor
  • Spintronics
  • Temperature distribution
  • Temperature measurement

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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