Phase T–x diagram of Sm1−xSrxMnO3 single crystals (0⩽x⩽0.8)

Abstract Magnetic and electrical properties of the Sm1−xSrxMnO3 (0⩽x⩽0.8) single crystals have been studied and T–x phase diagram has been revised. The compensation points of spontaneous magnetization were observed for the pure and low doped compositions. For 0.4⩽x⩽0.475 a ferromagnetic (F) ordering occurs as a first-order phase transition accompanied by magnetization and electrical resistivity jumps; magnetic field increases the temperature of this transition and spreads it resulting in an appearance of the critical point. Two different regions of the diagram have been distinguished for x⩾0.5. For the first region (0.5⩽x⩽0.575) a pure antiferromagnetic (AF) state without a spontaneous magnetization was observed below Neel temperature, while for the second one (0.6⩽x⩽0.675) an additional low temperature transition to a new phase possessing non-zero weak ferromagnetic moment was revealed.