Abstract
The compounds Bi5FeTi3O15 (BFTO) and Bi5Fe0.5Co0.5Ti3O15 (BFCT) were prepared by incorporating BiFeO3(BFO) and BiFe0.5Co0.5O3 (BFCO) into the host Bi4Ti3O12 using the solid state reaction technique. The X-ray diffraction and Raman shift data indicate that the as-prepared materials are of the four-layer Aurivillius phases. At room temperature, the half substitution of Fe-O layer by Co-O layer is found to result in the increase in the 2P r by about 35% and simultaneously the decrease in 2E c by about 41%, respectively. The magnetic moment at least tripled its value by substituting half Fe ions by Co ions. The remnant magnetization (2M r) and the coercive field (2H c) were about 7.8 memu/g and 410 Oe, respectively.
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