采用固相反应法制备了样品La0.3Ca0.7MnO3. 通过测量样品的M-T曲线、 M-H曲线和ESR曲线, 研究了La0.3Ca0.7MnO3的磁性质. 结果表明: 在262 K时形成电荷有序相(CO相). 当T>262 K时, 表现为顺磁;当T<190 K时, 表现为长程反铁磁(在AFM本底中存在少量FM成分);从262~190 K(TCO), 随温度降低在电荷有序态下从顺磁向反铁磁转变.
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