Measurements have been performed of the upper critical field Hc2 anisotropy in the magnetic heavy-fermion superconductor URu2Si 2. The dHc2/dT value is constant within 5% when H is rotated in the basal plane, whereas ∥dHc2/dT∥ decreases by about 35% for H rotated by 20°-30°out of the basal plane. Contrary to CeCu2Si2 the Hc2 anisotropy in URu 2Si2 is enhanced as temperature decreases below T c. This disparity can be attributed to the different strengths of paramagnetic and spin-orbit effects responsible for the suppression of superconductivity by a magnetic field in CeCu2Si2 and URu2Si2.
|Number of pages||3|
|Journal||Journal of Applied Physics|
|Publication status||Published - 1 Dec 1988|