Abstract
Solid solutions of bismuth layer structured Bi9−xTi3Mn5+xO27 (x = 0–3) system were prepared by the solid-state reaction technique using component oxides. X-ray powder diffraction, scanning electron microscopy, dielectric constant, variation of magnetization with magnetic field measurement techniques are used to characterize the compounds. The substitution of Mn3+ at Fe3+ site in Bi9−xTi3Mn5+xO27 was found to shift the Curie temperature towards the low-temperature region. The relationship between atomic displacement of B site ions (Ti4+, Fe3+, Mn3+) and the Curie temperature is discussed. Diffused type of phase transition was observed with a very high loss leading to the formation of soft ferroelectrics.
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