6533b851fe1ef96bd12aa042

RESEARCH PRODUCT

Anisotropic transport properties ofUNi2Al3thin films

subject

description

Experimental results on the transport anisotropy in thin films of the heavy fermion superconductor $\mathrm{U}{\mathrm{Ni}}_{2}{\mathrm{Al}}_{3}$ are presented. They show that the eletronic transport in $\mathrm{U}{\mathrm{Ni}}_{2}{\mathrm{Al}}_{3}$ for different directions is strongly dominated by different sheets of the Fermi surface, and that the magnetic moments must be assigned to a cylindrical part around the $c$ axis. Founded on the findings about the Fermi surface, the dependence of the resistive superconducting transition temperature ${T}_{c}$ on the current direction in $\mathrm{U}{\mathrm{Ni}}_{2}{\mathrm{Al}}_{3}$ can be explained as the result of weakly coupled superconducting gaps on different sheets of the Fermi surface. Additional experiments allow the exclusion of some alternative origins for the directional dependence of ${T}_{c}$.