Anomalous Temperature Dependence of the Upper Critical Field in Crystal of YNi2B2C
Mun-Seog Kim；Sung-Ik Lee；W. C. Lee
Chinese Journal of Physics
|Volume or Term/Year and Month of Publication||
34卷2S期（1996 / 04 / 01）
414 - 418
We have obtained the temperature dependence of the upper critical field Hc2(T) for a single crystalline of intermetallic YNi2B2c from magnetization measurements for the field parallel to the c-axis. A positive second derivative of Hc2(T) with respect to the temperature was observed at the low temperature region. This behavior is in sharp contrast to the conventional WHH theory for the weak-coupled superconductor.