Tetragonal D022 Mn3+xGe epitaxial films grown on MgO(100) with a large perpendicular magnetic anisotropy

Shigemi Mizukami, Akimasa Sakuma, Atsushi Sugihara, Takahide Kubota, Yukio Kondo, Hiroki Tsuchiura, Terunobu Miyazaki

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

First-principles calculation of D022 Mn3Ge shows a fully spin-polarized Δ1 band at the Fermi level, low saturation magnetization MS = 180 emu/cm3, high uniaxial magnetic anisotropy Ku = 23 Merg/cm3, and low Gilbert damping α = 9 × 10-4. We also experimentally investigate D022 Mn3+xGe epitaxial films grown on MgO(100) substrates with different compositions x. The films exhibit a coercivity of about 20 kOe, MS of about 130 emu/cm3, and Ku of about 10 Merg/cm3 at x = 0.55 (78 at.% Mn). These indicate that D022 Mn3Ge is a good candidate for spintransfer-torque random access memory.

Original languageEnglish
Article number123002
JournalApplied Physics Express
Volume6
Issue number12
DOIs
Publication statusPublished - 2013 Dec

ASJC Scopus subject areas

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

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