We present the synthesis and experimental characterization of the electronic properties of the cubic Laves phase superconductor CaRh2. Its crystal structure was confirmed by powder X-ray diffraction and its ambient temperature lattice parameter (a = 7.5326(6) Å) is in good agreement with the literature. Magnetization, resistivity and heat-capacity measurements indicate that CaRh2 is a moderate-coupling type-II superconductor (λe-p = 0.89) with a transition temperature Tc = 5.13 K. A sharp discontinuity at Tc in the heat capacity shows that the normalized specific-heat jump is ΔC/γTc = 1.78, which exceeds the value predicted by weak-coupling BCS theory (1.43).
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
- Experimental characterization
- Laves phase