Abstract
La0.7Sr0.3Mn1−xCuxO3 perovskite manganite materials with a composition of x = 0.05, 0.10 and 0.15 were obtained using solid state reaction technique. The measurement of ultrasonic velocity over a wide range of temperature reveals the short range ferromagnetic to the antiferromagnetic transition temperature (TC) at 358, 341 and 328 K for the perovskites with the composition x = 0.05, 0.10 and 0.15 respectively. Turning of TC was achieved from 370 (x = 0) to 328 (x = 0.15) K which helps to obtain the new cathode materials for solid-oxide fuel cell.
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