The low temperature specific heat of R5Rh6Sn 18 (R = Y, Lu) was measured under various magnetic fields (H) up to 8 T. In a zero field, electronic specific heat of Y5Rh 6Sn18 shows a T3 dependence, indicating an anisotropic superconducting gap, although that of Lu5Rh 6Sn18 shows an exponential dependence. In addition, the coefficient of the T-linear term γ(H) of Y5Rh 6Sn18 in specific heat in the mixed state is found to obey a square root dependence. This is another evidence that Y5Rh 6Sn18 has the anisotropic superconducting gap. On the other hand, the γ(H) of Lu5Rh6Sn18 shows linear dependence, which means the isotropic superconducting gap.
- Anisotropic superconducting gap
- Specific heat
- Y RhSn
ASJC Scopus subject areas
- Physics and Astronomy(all)