Differential-thermal analysis around and below the critical temperature T-c of various low-T-c superconductors: A comparative study
We present specific-heat data on the type-II superconductors V3Si, LuNi2B2C and NbSe2 which were acquired with a low-temperature thermal analysis (DTA) technique. We compare our data with available literature data on these superconductors. In the first part we show that the DTA technique allows for fast measurements while providing a very high resolution on the temperature scale. Sharp features in the specific heat such as at the one at the transition to superconductivity are resolved virtually without instrumental broadening. In the second part we investigate the magnetic-field dependence of the specific heats of V3Si and LuNi2B2C at a fixed temperature T=7.5 K to demonstrate that DTA techniques also allow for sufficiently precise measurements of absolute values of c(p) even in the absence of a sharp phase transition. The corresponding data for V3Si and LuNi2B2C are briefly discussed. (C) 2008 Elsevier B.V. All rights reserved.
Keywords: Heat capacity ; Thermodynamic properties ; Superconductivity phase diagrams ; Metals, alloys and binary compounds (including A15, MgB2 etc.) ; Ternary, quaternary and multinary compounds (including Chevrel phases, borocarbides, etc.) ; Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) ; Upper Critical-Field ; Density-Of-States ; Transition-Metal Borocarbides ; Dependent Specific-Heat ; High Magnetic-Fields ; V3Si ; Fluctuations ; Anisotropy ; Luni2B2C ; Vortex
Record created on 2010-11-30, modified on 2016-08-09