我们研究了超大磁阻材料La2/3Ca1/3MnO3的磁电特性,发现由电阻测量得到的绝缘体-金属相变与由磁化曲线得到的顺磁-铁磁相变温区完全一致,均随磁场的增强推向高温区.结果证明绝缘体-金属相变起因于磁序的变化,并伴随着超大磁电阻效应CMR的发生.
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