本文对A位掺杂的超大磁阻材料(La0.55Gd0.15)Sr0.3MnO3的磁热效应进行了研究,通过不同温度下的等温磁化(M-H)曲线的测量和计算,发现伴随铁磁-顺磁相变出现大的磁热效应,额外的磁性交换作用将导致额外的磁熵变化.
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