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La_0.67-xDy_xSr_0.33MnO₃（0.00≤x≤0.30）中的晶格效应

Lattice Effects in La_0.67-xDy_xSr_0.33MnO₃（0.00≤x≤0.30）

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【Author】 Guo Huanyin1, Liu Ning 1,2*, Xu Sujun2, Tong Wei2, Zhang Yuheng2 (1. Department of Physics, Suzhou Advanced Normal College, Suzhou 234000, China; 2. Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China)

【机构】宿州学院物理系；中国科学技术大学结构分析重点实验室；中国科学技术大学结构分析重点实验室安徽宿州234000；安徽宿州234000 中国科学技术大学结构分析重点实验室；安徽合肥230026；安徽合肥230026；

【摘要】用固相反应法在La0 .6 7Sr0 .33MnO3中进行了Dy掺杂研究。结果发现 ,随着Dy掺入量的增加 ,样品的金属绝缘体相变温度逐渐降低 ,对应的峰值电阻渐渐增大 ,居里温度下降 ,样品的磁电阻效应迅速增加 ,对Dy掺杂的作用可以用晶格效应来解释。更多还原

【Abstract】 The doping effects of Dy in La 0.7Sr 0.33MnO₃ oxide were studied by method of solide-state reaction. The results show that with increasing the doping amount of Dy the phase transition temperature of metal-isolator for the materials decreases monotonously, the corresponding peak resistance increases rapidly, the Curie temperature decreases monotonously, and the magnetoresistance increases quickly. The effects of doping Dy can be explained in terms of the lattice effect.更多还原