Abstract: | Upper critical fields, Hc2(T), for superconducting LaMo6Se8, La0.8Eu0.2Mo6Se8, La0.8Ce0.2Mo6Se8 and PrMo6Se8 were measured. For the best material, LaMo6Se8, Tc = 11.3 K, (dHc2/dT)T=Tc=70 kG/K and and Hc2 (4.2 K) = 370 kG. These selenide compounds show promise as very high field superconductors. |