The magnetic anisotropy energy of 13-atom Fe-Pt, Co-Pt and Ni-Pt clusters

Abstract

The spin-orbital coupling (SOC) effect and magnetic anisotropy energy (MAE) of 13-atom Fe-Pt, Co-Pt and Ni-Pt clusters were investigated by density functional theory. The result shows that the Fe-Pt system has a higher MAE than Co-Pt and Ni-Pt. In the Fe8Pt5 cluster, the main contribution of MAE comes from SOC interaction between d orbitals around the Fermi level in Pt atoms. The giant positive MAE is mainly due to the SOC interaction between the majority spin states of (Formula presented.) and (Formula presented.) orbitals.