Microstructure, morphology and magnetic property of (001)-textured MnAlGe Films on Si/SiO2 substrate

Rie Y. Umetsu, Satoshi Semboshi, Yoshifuru Mitsui, Hirokazu Katsui, Yoshito Nozaki, Isamu Yuitoo, Teruaki Takeuchi, Mikiko Saito, Hiroshi Kawarada

Research output: Contribution to journalArticlepeer-review

Abstract

Substrate heating effects on the microstructure and magnetic properties of MnAlGe films grown on Si/SiO2 substrate by sputtering system were investigated. The MnAlGe film fabricated by low-temperature substrate heating demonstrated amorphous phase and paramagnetic property. The film of c-axis orientation associated with the Cu2Sb-type structure was obtained by sputtering at a substrate heating temperature of 270°C and it exhibited perpendicular magnetic anisotropy. From the magnetization curves measured at room temperature, the uniaxial magnetic anisotropy energy, Ku, was evaluated to be in the order of 106 erg/cm3, which is consistent with the literature, although the heating processing and temperature are slightly different. Microstructural observation indicated that the c-axis oriented grains were isolated in the matrix of the amorphous phase. The film lost the c-axis orientation at elevated substrate heating temperature, resulting in loss of the anisotropic magnetic property.

Original languageEnglish
Pages (from-to)680-687
Number of pages8
JournalMaterials Transactions
Volume62
Issue number5
DOIs
Publication statusPublished - 2021

Keywords

  • C-axis orientation
  • Microstructure
  • Perpendicular magnetic anisotropy
  • Uniaxial magnetic anisotropy energy

ASJC Scopus subject areas

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

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