Magnetic, structural, and transport properties of the Heusler alloys Co2MnSi and NiMnSb -: art. no. 104430

被引：220

作者：

Ritchie, L ^{[1
]}

Xiao, G

Ji, Y

Chen, TY

Chien, CL

Zhang, M

Chen, JL

Liu, ZH

Wu, GH

Zhang, XX

机构：

[1] Brown Univ, Dept Phys, Providence, RI 02912 USA

[2] Johns Hopkins Univ, Dept Phys, Baltimore, MD 21218 USA

[3] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China

[4] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.68.104430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on structural, magnetic, transport, and spin-polarization measurements of the Heusler alloys Co2MnSi and NiMnSb. Laue diffraction patterns confirm the single-crystal nature of Co2MnSi. Room-temperature transport measurements show a negative magnetoresistance in NiMnSb. Point-contact Andreev reflection measurements of the spin polarization yield polarization values for Co2MnSi and NiMnSb of 56% and 45%, respectively. Temperature dependence of resistivity for Co2MnSi reveals a relatively large residual resistivity ratio (rho(293 K)/rho(5 K)) typical of single-crystal Heusler alloys. In NiMnSb, resistivity and magnetization as a function of temperature show evidence of a magnetic phase transition near 90 K.

引用

页数：6

共 26 条

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