Temperature dependence of the anomalous Nernst effect in
Ni 2 Mn Ga
shape memory alloy
Physical Review B(2021)
摘要
We report a detailed investigation of the ${\mathrm{Ni}}_{2}\mathrm{Mn}\mathrm{Ga}$ shape memory alloy through magnetic, electronic, and thermal measurements. Our measurements of the anomalous Nernst effect (ANE) reveal that this technique is very sensitive to the onset of the premartensitic transition in sharp contrast to other transport measurements. With the ANE being sensitive to changes at the Fermi surface, we infer on the link between the structural modulations and the modulation of the Fermi surface via its nesting features, with the magnetic field induced strain being the mediating mechanism.
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关键词
anomalous nernst effect,shape memory alloy,temperature dependence
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