title: Specific heat studies of pure Nb(3)Sn 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-order or a second-order thermodynamic transition. Careful measurements of the two transition temperatures display an inverse correlation between them. At low temperature, specific heat measurements show the existence of a single superconducting energy gap feature.
authors.affiliation: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, México, DF 04510, Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Escudero
authors.forename: F
authors.initials: F
authors.lastname: Morales
authors.forename: S
authors.initials: S
authors.lastname: Bernès