Title :
Thermal conductivity of RNi2B2C (R=Gd, Dy, Ho, Er, Tm and Lu) systems
Author :
Cao, Shixun ; Sakai, Shuji ; Nishimura, Katsuhiko ; Mori, Katsunori
Author_Institution :
Fac. of Eng., Toyama Univ., Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
We have systematically studied the thermal conductivity of the quaternary nickel borocarbide compounds RNi2B2C (R=Gd, Dy, Ho, Er, Tm and Lu). Thermal conductivity measurements have been conducted for RNi2B2C systems in the temperature range from 4.2 K to 25 K, under applied magnetic fields up to 30 kOe. The temperature dependence of thermal conductivity for the superconducting samples in zero magnetic field show a small and clear decrease at their superconducting transition temperatures. In zero or lower magnetic fields, the thermal conductivity for the samples with magnetic transition show a small peak at their magnetic transition temperatures (TN or Tm), which disappear under higher applied magnetic fields. The results suggest the existence of strong electron-phonon interplay in these compounds
Keywords :
dysprosium compounds; electron-phonon interactions; erbium compounds; gadolinium compounds; holmium compounds; lutetium compounds; magnetic transition temperature; nickel compounds; superconducting transition temperature; thermal conductivity; thulium compounds; 4.2 to 25 K; DyNi2B2C; ErNi2B2C; GdNi2B2C; HoNi2B2C; LuNi2B2C; TmNi2B2C; applied magnetic fields; electron-phonon interplay; magnetic transition temperatures; superconducting transition temperature; temperature dependence; thermal conductivity; Conductivity measurement; Erbium; Magnetic field measurement; Magnetic fields; Nickel; Superconducting magnets; Superconducting transition temperature; Temperature dependence; Temperature distribution; Thermal conductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
