Magnetization and spin polarization of Co2-xFexMnSi Heusler alloys

被引：2

作者：

Shigeta, Iduru ^{[1
]}

Urakawa, Shinpei ^{[1
]}

Ito, Masakazu ^{[1
]}

Hiroi, Masahiko ^{[1
]}

机构：

[1] Kagoshima Univ, Dept Phys & Astron, Kagoshima 8900065, Japan

来源：

26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 | 2012年 / 400卷

关键词：

D O I：

10.1088/1742-6596/400/3/032082

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report magnetization and spin polarization of Co2-xFexMnSi Heusler alloys. Co2-xFexMnSi Heusler alloys are theoretically predicted to be half-metals (HM's) and generally possess high Curie temperature. The fact that the saturation magnetization of Co2-xFexMnSi for 0 <= x <= 1.5 obeys the Slater-Pauling rule reveals that those compounds are experimentally expected to be HM's. Therefore, the spin polarization of Co2-xFexMnSi Heusler alloys was determined by the Andreev reflection technique using Co2-xFexMnSi/Pb planar-type junctions. The obtained differential conductance was able to be fitted very well by the modified Blonder-Tinkham-Klapwijk theory. From analysis of spin polarization measurements, we have found the spin polarization of P = 0.50 for x = 0.5 and P = 0.52 for x = 1.25, respectively. Consequently, the spin polarization was less dependent of different concentrations of x.

引用

页数：5

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