节点文献
La0.7-xDyxSr0.3MnO3 (0.00≤x≤0.70)的TCR研究
Investigation on TCR in La0.7-xDyxSr0.3MnO3 (0.00≤x≤0.70)
【摘要】 研究了La位Dy掺杂对La0.7-xDyxSr0.3MnO3(0 00 x 0 70)电阻温度系数(TCR)的影响。实验结果表明:Dy掺杂将引起电阻率曲线的急剧变化,导致出现大的TCR;随Dy掺杂的增加,TCR在x=0.30出现峰值,然后随掺杂量的增加逐步降低。体系出现大的TCR,来源于Dy掺杂引起的晶格畸变和额外磁性耦合。
【Abstract】 The effect of Dy doping in La0.7-xDyxSr0.3MnO (000x070) on the temperature coefficient of resistance (TCR) was investigated. Experimental results show that the Dy doping causes a steep change of resistance, resulting in large TCR. With the increase of Dy content, a TCR peak appears at x=030, and then the TCR decreases gradually with further increasing doping level. This large TCR should result from lattice distortions and extra magnetic coupling induced by Dy3+ ions.
【关键词】 凝聚态物理;
电阻温度系数;
额外磁性耦合;
超大电阻变化;
稀土;
【Key words】 coherence physics; temperature coefficient of resistance (TCR); extra magnetic coupling; colossal resistance change; rare earths;
【Key words】 coherence physics; temperature coefficient of resistance (TCR); extra magnetic coupling; colossal resistance change; rare earths;
【基金】 国家自然科学基金重点项目(10334090);国家重点基础研究发展规划项目(001CB610604)
- 【文献出处】 中国稀土学报 ,Journal of The Chinese Rare Earth Society , 编辑部邮箱 ,2004年06期
- 【分类号】TM273
- 【被引频次】4
- 【下载频次】68