High temperature studies on Nd_(0.95)MnO_(3±δ)

摘要

Nd_(0.95)MnO_(3±δ), synthesized by solid state route crystallizes into (O'-type) orthorhombic phase. The O'-type orthorhombic structure shows distortion of MnO_6 octahedra due to orbital characteristic of Jahn-Teller effect of Mn~(3+) cations. Above ～ 1012 K these MnO_6 octahedra become nearly regular. There is no change in symmetry however structural phase transition from O'-type to O-type orthorhombic structure is observed. Electrical conductivity studies further elucidate the observed structural phase transition.