Pressure-induced electrical and magnetic property changes in CaCuMn6O12

CaCuMn6O12 was prepared by using a traditional solid-state reaction method. It is a highly correlated electron system with a small gap appearing at E F and cluster glass state at low temperature, whereas temperature dependence of resistivity suggests that it is related to thermally activated nearest-neighbor hopping in paramagnetism state in higher temperature range. The resistivity decreases with increasing pressure until 11 kbar, and then increases with further increasing pressure. The blocking temperature T b goes down under pressure, indicating the suppression of cluster glass state under pressure