中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127501-127501.doi: 10.1088/1674-1056/19/12/127501
郑琳1, 鲁毅1, 赵建军1, 邢茹1, 吴鸿业1, 金香1, 周敏1, 张向群2, 成昭华2
Zheng Lin(郑琳)a)†, Lu Yi(鲁毅)a), Zhao Jian-Jun(赵建军)a), Zhang Xiang-Qun(张向群)b), Xing Ru(邢茹) a), and Wu Hong-Ye(吴鸿业)a), Jin Xiang(金香)a), Zhou Min(周敏)a), and Cheng Zhao-Hua(成昭华)b)
摘要: The effect of Dy substitution for La site in layered manganese oxides La1.3Sr1.7Mn2O7 on the magnetic and electrical properties has been investigated. With the La3+ substituting by Dy3+, the long range three-dimensional ferromagnetism transition and the insulator–metal transition disappear. These effects are attributed to the lattice distortion due to the substitution of the smaller Dy3+. Addtionally, the small Dy3+ is inclined to occupy the R site which is in the rock-salt layer, then the distribution of La, Sr, Dy ions in Dy-doped sample should be more orderly than that in La1.3Sr1.7Mn2O7, so there is only one insulator–metal transition in the ρ–T curve of the sample with x=0.05 and x=0.1.
中图分类号: (Impurities in crystals)