Magnetic Properties and Spin Polarization of Fe₂Cr_1-xV_xSi Heusler Alloy

Abstract

  We have investigated the structures, magnetic properties and spin polarization of bulk Fe₂CrSi and Fe₂Cr_1-xV_xSi Heusler alloys. Single-phase structures were obtained for all samples by setting the composition 22% forY-atom of X₂YZ Heusler alloy. The saturation magnetization of Fe₂Cr_1-xV_xSi for x 0.5 decreased monotonically with increasing V content, while their Curie temperatures T_c and spin polarization P remained constant. For alloys with x > 0.5, saturation magnetization decreased rapidly with increasing V content. Experimental results of spin polarization P were discussed from the viewpoint of the Fe, Cr and V partial density of states determined by the band calculation.