Ab-initio study for the correlation effect on the magneto-optical properties of Co-based full Heusler alloys

作者：Kim Miyoung^*; Lim Hanjo; Lee Jae Il

来源：Thin Solid Films, 2011, 519(23): 8419-8422.

DOI：10.1016/j.tsf.2011.03.096

• Heusler alloys
• Magneto-optical effect
• Ab-initio
• FLAPW

Magneto-optical (MO) properties of ferromagnetic Co(2)YGe full-Heusler alloys (Y=Fe and Mn) are investigated by the first principles electronic structure calculations using the highly accurate FLAPW method within GGA + U approach. The polar magneto-optical Kerr angles are calculated by solving Kubo's linear response formula using the FLAPW eigenstates and eigenfunctions to obtain the optical conductivity by interband transitions. The typical features of polar Kerr rotation of transition metals with two major peaks were obtained while the low energy spectra are enhanced largely at 1-2 eV region compared to GGA results. Detailed electronic structures analysis revealed that this enhancement is due to the decreased interband transitions by reduced diagonal optical conductivity. Results indicate that the MO spectra can be used to determine the appropriate correlation level for the present alloys.

• 出版日期2011-9-30