Transport and structural study of pressure-induced magnetic states in Nd0.55Sr0.45MnO3 and Nd0.5Sr0.5MnO3

Pressure effects on the electron transport and structure of Nd 1 - x Sr x MnO 3 (x=0.45, 0.5) were investigated in the range from ambient to ∼6 GPa. In Nd 0 . 5 5 Sr 0 . 4 5 MnO 3 , the low-temperature ferromagnetic metallic state is suppressed and a low-temperature insulating state is induced by pressure. In Nd 0 . 5 Sr 0 . 5 MnO 3 , the CE-type antiferromagnetic charge-ordering state is suppressed by pressure. Under pressure, both samples have a similar electron-transport behavior although their ambient ground states are much different. It is surmised that pressure induces an A-type antiferromagnetic state at low temperature in both compounds.