2003/04/30 by M. Angst, Manuel Angst, D. Di Castro +11 · 1 citation
Materials Science · Physics and Astronomy · #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #Thermal Expansion and Ionic Conductivity #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physc.2004.02.045
published as Physica C 408-410, 88 (2004) · 2 p.,2 Fig., submitted to Physica C (M2S-Rio proceedings); v2: 1 ref added
arxiv created 2003/05/05 · openalex publication_date 2004/04/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Anisotropic properties of superconducting MgB2 obtained by torque magnetometry are compared to theoretical predictions, concentrating on two issues. Firstly, the angular dependence of Hc2 is shown to deviate close to Tc from the dependence assumed by anisotropic Ginzburg-Landau theory. Secondly, from the evaluation of torque vs angle curves it is concluded that the anisotropy of the penetration depth gammalambda has to be substantially higher at low temperature than theoretical estimates, at least in fields higher than 0.2 T.