Preparation and Characterization of Superconducting B1-Type Mo1-xNbxN Thin Films |
| |
Authors: | Gao-Chao Lai Masao Takahashi Kohji Nobugai Fumikazu Kanamaru |
| |
Affiliation: | The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka Ibaraki, Osaka 567, Japan |
| |
Abstract: | Solid-solution thin films, Mo1?xNbxN, with B1 (NaCl) structure have been deposited on substrates at 450°C by reactive sputtering of composite targets with Mo and Nb metals in an equimolar Ar and N2 gas mixture. The lattice parameter of the solid solution increased linearly with an increase of Nb content, x . The superconducting transition temperature, T c, of the Mo-rich films ( x ≦ 0.12) was around 6 K, which was lower than that expected from theoretical prediction. The residual resistivity ratio, r =ρ(300 K)/ρ(20 K), of the films varied with x , and a minimum value of r was observed in the vicinity of x = 0.5. |
| |
Keywords: | superconductivity molybdenum films nitrides niobium |
|
|