Large negative magnetoresistance in quaternary Heusler alloy Ni50Mn8Fe17Ga25 melt-spun ribbons -: art. no. 182507
Large negative magnetoresistance in quaternary Heusler alloy Ni50Mn8Fe17Ga25 melt-spun ribbons -: art. no. 182507
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DOI：
10.1063/1.1925783
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发表时间：
2005-05-02
影响因子：
4
通讯作者：
Wu, GH
中科院分区：
文献类型：
--
作者：
Liu, ZH;Liu, H;Wu, GH
采用快淬法制备了四元Heusler合金Ni 50 Mn 8 Fe 17 Ga 25薄带。在很宽的温度范围内，特别是在马氏体相变过程中，薄带表现出很大的负磁阻（MR）{=[R（H）-R（0）]/R（0）}。退火后，MR显著降低。大磁电阻是各向同性的，主要归因于局部磁无序、磁团簇和非均匀性。马氏体相变时的最大磁电阻可能是由于电子的重新分布和相界散射的增加。这一特性为已经很有趣的Heusler合金增加了一个有用的功能。2005年美国物理学会。
Quaternary Heusler alloy Ni50Mn8Fe17Ga25 ribbons have been prepared by the melt-spun method. The ribbons exhibit large negative magnetoresistance (MR){=[R(H)-R(0)]/R(0)} over a wide temperature region, particularly in the region during the martensitic phase transformation. The MR decreases significantly after annealing. The large MR is isotropic and is mainly attributed to the local magnetic disorders, magnetic clusters, and heterogeneity. The maximum MR at martensitic transformation may be due to the redistribution of electrons and the increase of phase boundary scattering. This feature adds a useful functionality to the already interesting Heusler alloys. 2005 American Institute of Physics.