Magnetic, structural, and transport properties of the Heusler alloys Co2MnSi and NiMnSb

Article

关键词: GIANT MAGNETORESISTANCE;    ELECTRONIC-STRUCTURE;    SPIN POLARIZATION;    THIN-FILM;    PHOTOEMISSION;    FERROMAGNET;    SI;   

DOI  :  10.1103/PhysRevB.68.104430

来源: SCIE

【 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.

【 授权许可】

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