Effect of boron, carbon stoichiometry on the superconducting properties of LuNiBxCy system

✍ Scribed by G.V.M. Kiruthika; P.L. Paulose; Sujata Patil; L.C. Gupta

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 140 KB
• Volume: 433
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2005.09.014

✦ Synopsis

Superconducting properties of LuNiB x C y (0.8 6 x, y 6 1.2) have been investigated. Specific heat anomaly at T c $ 2.6 K observed for the compound LuNiB 0.9 C, confirms the bulk superconductivity in the system. The N(E f ) value of 2.4 states/eV unit cell calculated from the specific heat measurements for the compound, is comparable with the theoretical value of 1.95 states/eV unit cell for the system. A highest T c of 3.2 K has been achieved in the compound LuNiB 0.8 C 1.2 . Our results indicate that the variation of B and C stoichiometry has appreciable influence on the 1 1 1 1-type (LuNiBC) phase formation and its superconducting properties revealing the complex band structure dependence of the system.