Fe2Cr1-xVxSiホイスラー合金の磁性とスピン分極率

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We have investigated the structures, magnetic properties and spin polarization of bulk Fe2CrSi and Fe2Cr1-xVxSi 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 Fe2Cr1-xVxSi for x 0.5 decreased monotonically with increasing V content, while their Curie temperatures Tc 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.