arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1005.0436cond-mat.str-elcond-mat.mtrl-sci
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Fe离子掺杂对La0 1- xFexO3 x = 0.0 ~ 1.0的电磁性能的影响

Fe ion doping effect on electrical and magnetic properties of La0.7Ca0.3Mn1-xFexO3 x = 0.0 to 1.0

Neeraj Kumar, H. Kishan, V. P. S. Awana

摘要:

本文报道了用传统固相反应法制备的Fe掺杂的La_(0.7)Ca_(0.3)Mn_(1-x)Fe_xO_3(x = 0.0 ~ 1.0)的结构、电学和磁学性质。XRD的模拟数据显示,随着Fe离子浓度的增加,体积增加。XPS支持Fe ~(3+)离子直接取代Mn ~(3+)离子的观点。向较低波数和对称IR能带结构移动证实了Fe离子的体积增加和均匀分布。铁离子由于其稳定的半满3d轨道,对双交换(DE)导电机制没有贡献。Fe ~(3+)离子的存在促进了超交换作用产生的反铁磁性(AFM),抑制了绝缘体-金属转变温度(TIM)。磁性测量结果表明,磁极化子的存在支持的单位晶胞体积的增加和偏离居里-外斯定律。

英文摘要:

Here we report the structural, electrical and magnetic properties of Fe doped La0.7Ca0.3Mn1-xFexO3 with x = 0.0 to 1.0 prepared by conventional solid state reaction method. Simulated data on XRD shows an increase in volume with an increase in Fe ion concentration. XPS supports that Fe3+ ions directly substitute Mn3+ ions. Shifting towards lower wave-number and symmetric IR band structure confirms increase in volume and homogeneous distribution of Fe ions. Fe ion doesn't contribute in double-exchange (DE) conduction mechanism due to its stable half filled 3d orbital. The presence of Fe3+ ions encourages anti-ferromagnetism (AFM) generated by super-exchange interaction and suppress insulator-metal transition temperature (TIM). Magnetic measurements show the existence of magnetic polarons supported by increase in volume of unit cell and deviation from Curie-Weiss law.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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