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 EF 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 Tb goes down under pressure, indicating the suppression of cluster glass state under pressure.