Specific heat studies of pure Nb3Sn single crystals at low temperature

Details Specific heat studies of pure Nb3Sn single crystals at low temperature Specific heat studies of pure Nb3Sn single crystals at low temperature

2009-07-02

arxiv.org/abs/0907.0411v1

Physics

Condensed Matter

Superconductivity

Accepted in Journal of Physics: Condensed Matter

Scientific paper

Specific heat measurements performed on high purity vapor-grown Nb$_3$Sn crystals show clear features related to both the martensitic and superconducting transitions. Our measurements indicate that the martensitic anomaly does not display hysteresis, meaning that the martensitic transition could be a weak first or a second order thermodynamic transition. Careful measurements of the two transition temperatures display an inverse correlation between both temperatures. At low temperature specific heat measurements show the existence of a single superconducting energy gap feature.

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