Strain-promoted perpendicular magnetic anisotropy in Co-Rh alloys


Aksu P., Deger C. , Yavuz I. , Yildiz F.

APPLIED PHYSICS LETTERS, vol.116, no.21, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 116 Issue: 21
  • Publication Date: 2020
  • Doi Number: 10.1063/5.0010606
  • Title of Journal : APPLIED PHYSICS LETTERS

Abstract

We report on a comprehensive experimental, numerical, and computational investigation on the concentration dependence of the structural/magnetic properties of Co-Rh alloy films. A sizable perpendicular magnetic anisotropy is achieved by controlling the lattice strain via the Co content. Within the 30-40% range of Co concentrations, an experimental effective magnetic anisotropy on the order of 100kJ/m(3) and a computational uniaxial magnetic anisotropy energy of 567 mu eV/atom have been observed. First-principles calculations revealed that the lattice strain promotes a strong d-orbital degeneracy near the Fermi level for 40% of Co concentration, leading to an enhanced magnetic anisotropy energy.