PROJECT TITLE :

Magnetic and structural properties of Ba(Co1−xMnx)O3 using synchrotron x-ray spectroscopy

ABSTRACT:

We have a tendency to report on the connection between structural and magnetic properties, plus their Mn-substitution dependence for ceramics Ba(Co1−xMnx)O3 (x = 0.00–zero.30) following an analysis using synchrotron X-ray spectroscopy. The crystal structure of samples of Ba(Co1ͨa pair of;xMnx)O3 ceramics modified from 2H- to 10H- through 12H-sort phases depending on composition ratio x. The saturation magnetization increased within the presence of the 12H-sort phase, and decreased in the presence of the 10H-kind section; a most price of 2.forty nine μB/f.u. at 5 K is obtained with composition ratio x = zero.1. The correlation between structural and magnetic properties as well as their dependence on Mn substitution are explained by the preferential occupation of the cubic stacking sites by Mn ions. The 12H-sort part exhibited ferri-magnetic ordering attributed to the ferromagnetic super-exchange coupling of Co4+(d5)̵one;O2−̵one;Mn4+(d3) with a bonding angle of a hundred and eighty°; the 2H- and 10H-sort phases exhibited anti-ferromagnetic ordering attributed to the anti-ferromagnetic super-exchange couplings of Co4+(d5) ̵one;O2−̵one;Co4+(d5) and Co4+(d5) ̵one;O2ͨtwo;–Mn4+(d3), respectively, with a bonding angle of 90°. The saturation magnetization thus will increase with the presence of the ferromagnetic 12H-kind phase, whereas it decreases in the presence of the anti-ferromagnetic 10H-type phase.