TITLE

Large negative magnetoresistance in quaternary Heusler alloy Ni50Mn8Fe17Ga25 melt-spun ribbons

AUTHOR(S)
Liu, Z. H.; Liu, H.; Zhang, X. X.; Zhang, X. K.; Xiao, John Q.; Zhu, Z. Y.; Dai, X. F.; Liu, G. D.; Chen, J. L.; Wu, G. H.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/2/2005, Vol. 86 Issue 18, p182507
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
17164678

 

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