Specific heat studies of pure Nb3Sn single crystals at low temperature

Abstract

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.

Accepted in Journal of Physics: Condensed Matter

References in corpus (1)

• Specific heat of Nb_3Sn: The case for a second energy gap

Cited by in corpus (3)

• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Point Contact Spectroscopy of Nb3Sn Crystals: Evidence of a CDW Gap Related to the Martensitic Transition
• Structural phase transitions in Pr${}_{1-x}$La${}_x$AlO${}_3$: Heat capacity and x-ray scattering studies