Magnetic and transport properties in Sr1−xLaxFe1−xMnxO3
Magnetic and transport properties in Sr1−xLaxFe1−xMnxO3
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DOI：
10.1016/j.jmmm.2006.01.231
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发表时间：
2006-11
影响因子：
2.7
通讯作者：
Jiyu Fan;L. Pi;S. Liao;Yuheng Zhang
中科院分区：
文献类型：
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作者：
Jiyu Fan;L. Pi;S. Liao;Yuheng Zhang
研究了钙钛矿结构Sr_（1-x）La_xFe_（1-x）Mn_xO_3的磁性和输运性质。随着x的增加，系统铁磁性逐渐增强，在低温区出现团簇自旋玻璃态。在0.3≤ x≤ 0.7时，电子自旋共振测量结果表明，铁磁相与顺磁相分离。虽然所有样品都表现出半导体性质，但它们的输运性质受两种不同的机制支配，即x≤ 0.5样品的电子输运是通过热激活实现的，而x≥ 0.7样品的电子输运是通过变程跳跃实现的。从Mn/Fe离子的相互作用可以理解不同的输运机制
The magnetic and transport properties in the perovskite Sr1-x La x Fe1-x Mn x O3 have been explored. As x rises, the systemic ferromagnetism increases gradually and cluster-spin-glass state occurs in the low-temperature region. For 0.3≤ x≤ 0.7, the ferromagnetic phase separation from the paramagnetic phase was observed from the results of electron-spin-resonance measurement. Although all samples show a semiconducting behavior, their transport properties are dominated by two different mechanisms, namely, the electronic transport of x≤ 0.5 samples is realized by thermal activation but the variable-range hopping is applied in x≥ 0.7 ones. The different transport mechanism can be understood from the Mn/Fe ions interaction