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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Magnetic and electrical properties of Bi_(0.8)Ca_(0.2)Fe_(1-x)Mn_xO_3 (0 = x = 0.5)
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Magnetic and electrical properties of Bi_(0.8)Ca_(0.2)Fe_(1-x)Mn_xO_3 (0 = x = 0.5)

机译：Bi_（0.8）Ca_（0.2）Fe_（1-x）Mn_xO_3的磁和电性能（0 <= x <= 0.5）

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摘要

Mn-substituted Bi_(0.8)Ca_(0.2)FeO_3 ceramics Bi_(0.8)Ca_(0.2)Fe_(1-x)Mn_xO_3 (0 < = x < = 0.5) were synthesized by a solid-state reaction method. Powder X-ray diffraction investigations performed at room temperature show that the crystal structure is rhombohedral for x < = 0.1 and orthorhombic for 0.2 < = x < = 0.5. Compared to the undoped Bi_(0.8)Ca_(0.2)FeO_3 compound, enhanced magnetization and electric polarization were observed in the samples with x < = 0.1. A further increase in the magnetization with increasing x took place in the samples with 0.2 < = x < = 0.5. All the Mn-substituted samples studied are basically antiferromagnetic accompanied by the appearance of weak ferromagnetism, which is similar to the BiFeO_3 compound. The conductivity of the samples with x > = 0.3, measured between 140 and 380 K, is of the semiconducting type.
机译：通过固相反应法合成了Mn取代的Bi_（0.8）Ca_（0.2）FeO_3陶瓷Bi_（0.8）Ca_（0.2）Fe_（1-x）Mn_xO_3（0≤x≤0.5）。在室温下进行的粉末X射线衍射研究表明，对于x <= 0.1，晶体结构是菱面体，对于0.2 <= x <= 0.5，晶体结构为斜方晶。与未掺杂的Bi_（0.8）Ca_（0.2）FeO_3化合物相比，在x <= 0.1的样品中观察到增强的磁化和极化作用。在x <= x <= 0.5的样品中，随着x的增加，磁化强度进一步增加。所研究的所有Mn取代样品基本上都是反铁磁性的，并伴有弱铁磁性的出现，这类似于BiFeO_3化合物。在140至380 K之间测得的x> = 0.3的样品的电导率属于半导体类型。

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