Magnetoresistance and its relation to magnetization in Ni50Mn35Sn15 shape-memory epitaxial films

Magnetoresistance and its relation to magnetization in Ni50Mn35Sn15 shape-memory epitaxial films

The magnetoresistance (MR) of Heusler alloy Ni50Mn35Sn15 epitaxial films on MgO substrates is studied as a function of temperature T and magnetic field H. The large negative MR extends over martensitic transformation with maximum of −22% at 110 K. In martensitic and austenitic phase, the MR is −3% a...

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Bibliographic Details
Published in:Applied physics letters Vol. 100; no. 16
Main Authors: Dubowik, J., Załȩski, K., Gościańska, I., Głowiński, H., Ehresmann, A.
Format: Journal Article
Language:English
Published: 16-04-2012
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Summary:The magnetoresistance (MR) of Heusler alloy Ni50Mn35Sn15 epitaxial films on MgO substrates is studied as a function of temperature T and magnetic field H. The large negative MR extends over martensitic transformation with maximum of −22% at 110 K. In martensitic and austenitic phase, the MR is −3% and −5%, respectively. We show that the MR is governed mainly by magnetization paraprocess at high magnetic fields and scales as the square of magnetization Δm(H,T)2.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4704562