Specific heat measurements of antiferromagnet TbB2C2 with TN=21.7 K were carried out under magnetic fields up to 8 T applied along the [1 0 0] and [1 1 0] directions. The application of magnetic fields in TbB2C2 leads to increase of the transition temperature in both directions. In case for H \parallel [1 1 0], the transition temperature reaches 31.8 K under 8 T which indicates that magnetic fields anomalously stabilize the antiferromagnetic ordered state. The obtained field dependence of the transition temperature is quite anisotropic between the [{1 0 0}] and [{1 1 0}] directions, which is similar to the antiferroquadrupolar compounds DyB2C2 and HoB2C2.
PACS numbers: 75.30.Kz, 75.90.+w, 75.40.Cx
| Table of Contents | Back to Number 22 contents |