Abstract
The magnetoresistance (MR) of Ni2Mn1+xSn1−x (0.40≤x≤0.52) is studied as functions of temperature and magnetic field in austenitic and martensitic phases. The maximum MR obtained is −36% (x=0.4) at 170 K with 7 T magnetic field during martensitic transition. The MR in the martensitic phase (maximum −2.2%) is less than that in austenitic phase (maximum −4.6%). The origin of less MR below and above martensitic transition is understood through the experimental data fitting with magnetic field dependence (Hn) of MR.
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