Stabilization of the tetragonal distortion of Fe chi Co1-chi alloys by C impurities: A potential new permanent magnet

作者:Delczeg Czirjak E K; Edstrom A; Werwinski M; Rusz J*; Skorodumova N V; Vitos L; Eriksson O
来源:Physical Review B, 2014, 89(14): 144403.
DOI:10.1103/PhysRevB.89.144403

摘要

We have analyzed by density functional theory calculations the structural and magnetic properties of Fe-Co alloys doped by carbon. In analogy with the formation of martensite in steels we predict that such a structure also forms for Fe-Co alloys in a wide range of concentrations. These alloys are predicted to have a stable tetragonal distortion, which in turn leads to an enhanced magnetocrystalline anisotropy energy of up to 0.75 MJ/m(3) and a saturated magnetization field of 1.9 T.

  • 出版日期2014-4-2