Synthesis, Structural and Magnetic Properties of La0.5Ba0.5CoO2.75+x

Hole doping to the Co3+ ion in cobaltite perovskites can significantly modify the electromagnetic properties. The hole-doped cobaltite perovskites La0.5Ba0.5CoO2.75+x (x = 0.08 and x = 0.16) has been prepared by standard solid-state reaction. Neutron powder diffraction and dc-magnetization experiments were performed to investigate the crystal structure and magnetic properties. It is found that both samples have the cubic crystal structure with space group Pm (3) over barm in all the measured temperatures. Ferromagnetic transition occurs at 160 K in x = 0.16 sample. For x = 0.08, found that the short-range ordered ferromagnetic state and a long-range ordered antiferromagnetic state coexist in low temperature. (C) 2018 Atom Indonesia. All rights reserved