The paramagnetic susceptibility of YNi2B2C single crystal in a high magnetic field is found to be about 2 × 10-5 cm3/mol, which is one order of magnitude smaller than the previous reports. The paramagnetic behavior is caused by the sample impurity, not by the intrinsic magnetism of the YNi2B2C superconductor and shows simple Curie-Weiss behavior. In this case, an upper critical field of the YNi2B2C can be easily obtained by extracting the paramagnetic contribution. The upper critical field shows an anomalous behavior, the steep rising at the low temperature region.
Bibliographical noteFunding Information:
This work is supported by the Creative Initiative Research Program of the Ministry of Science and Technology of Korea and KOSEF (contract number 95-0702-03-01-3). W.C. Lee was supported in part by Ministry of Education (BSRI-97-2416) and Non Direct Research Fund, Korea Research Foundation 1997.
- Curie-Weiss behavior
- Paramagnetic susceptibility
- Upper critical field
- YNiBC superconductor