Room temperature charge and orbital ordering and phase coexistence in Bi0.5Sr0.5MnO3
Frontera, C Garcia-Munoz, JL Llobet, A Aranda, MAG Ritter, C Respaud, M Vanacken, Johan #
Iop publishing ltd
Journal of physics-condensed matter vol:13 issue:5 pages:1071-1078
We present high-resolution neutron and synchrotron powder diffraction, magnetotransport, and magnetization measurements on Bi0.5Sr0.5MnO3 We report that, for the whole range of temperature 1.5 K less than or equal to T less than or equal to 300 K, the sample studied exhibits coexistence of two phases. The majority phase presents charge and orbital order at least below 350 K. The existence and stability of charge order up to this high temperature agrees with the fact that magnetic fields higher than 45 T are not sufficient to melt the charge-ordered state at 4 K, This is in great contrast with the behaviour of non-Bi-based Ln(1/2)Sr(1/2)MnO(3) isostructural oxides.