Composition and temperature dependence of the thermoelectric power of Ni$_{2+x}$Mn$_{1-x}$Ga alloys

The thermoelectric power (TEP) measurements have been carried out to investigate the changes in the electronic structure associated with the intermartensitic and martensitic transitions in Ni $_{2 + x}$ Mn $_{1 - x}$ Ga (0 $\leq$ x $\leq$ 0.19). The samples have been characterized by a.c. magnetic susceptibility measurements. The correlation between the TEP and the microstructural changes sensitive to the increasing Ni content in Ni $_{2 + x}$ Mn $_{1 - x}$ Ga has been investigated. The changes in the density of states as reflected in the temperature variation of the TEP are consistent with the conclusions drawn from the Jahn-Teller mechanism of lattice distortion.

Composition and temperature dependence of the thermoelectric power of Ni $_{2 + x}$ Mn $_{1 - x}$ Ga alloys

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Composition and temperature dependence of the thermoelectric power of Ni $_{2 + x}$ Mn $_{1 - x}$ Ga alloys

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Composition and temperature dependence of the thermoelectric power of Ni2+x2+x​Mn1−x1−x​Ga alloys

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Composition and temperature dependence of the thermoelectric power of Ni2+x2+x​Mn1−x1−x​Ga alloys

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Composition and temperature dependence of the thermoelectric power of Ni $_{2 + x}$ Mn $_{1 - x}$ Ga alloys

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Composition and temperature dependence of the thermoelectric power of Ni $_{2 + x}$ Mn $_{1 - x}$ Ga alloys

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