Superconductivity in the intermetallic compound YRhAl
摘要
The intermetallic compound, YRhAl, has been prepared and is found to be isomorphic with RRhAl (R=Pr, Nd, Gd, Ho and Tm) compounds crystallizing in the orthorhombic TiNiSi-type structure (Space group Pnma). Heat capacity and electrical resistivity measurements in the He-3 temperature range reveal that this compound is superconducting with a transition temperature, Tc, of 0.9 K. The electronic specific heat coefficient, gamma, and the Debye temperature are found to be 6.1 mJ/mole K and 197 K, respectively. The specific heat jump at the superconducting transition temperature is found to be consistent with the BCS weak-coupling limit. This combined with the earlier observation of superconductivity in LaRhAl (Tc = 2.4 K) having a different structure than that of YRhAl, suggests that the underlying structure is not very crucial for the occurrence of superconductivity in RRhAl series of compounds.
引用
@article{arxiv.cond-mat/0406109,
title = {Superconductivity in the intermetallic compound YRhAl},
author = {Darshan C. Kundaliya and S. K. Malik},
journal= {arXiv preprint arXiv:cond-mat/0406109},
year = {2009}
}
备注
12 pages of text and fiugures