Anomalous superconducting properties of SnxEu1.2xMo6S8 at high pressure and high magnetic field

Abstract
The critical field Hc2 of pressure-induced superconductors, SnxEu1.2xMo6S8 (x=0, 0.12) has been measured as a function of temperature under pressures up to 18 kbar and in magnetic fields up to 17 T. We see an anomalous dependence of Hc2 on pressure from 13 to 18 kbar. A strong pressure-dependent exchange interaction producing a compensation field at the Mo site is thought to be responsible for this behavior.