Magnetic phase transitions of Pr0.65Ca0.21Sr0.14MnO3 and Pr0.65Ba0.35MnO3 single crystals

Abstract The magnetic phase transitions in single crystals Pr 0.65 Ca 0.21 Sr 0.14 MnO 3 and Pr 0.65 Ba 0.35 MnO 3 were studied using the magnetic moment measurement. The magnetization curves and temperature dependences of the magnetization at T > T C were compared with those following from the phenomenological theory taking into account the phase separation below T C . This procedure verified that the ferromagnetic phase in both crystals undergoes the first-order transition to the paramagnetic state, which is in agreement with the NMR results. Information on the temperature interval of the phase separation was also obtained.