Magnetic and transport properties of Dy substituted layered perovskite La1.3Sr1.7Mn2O7

doi:10.1088/1674-1056/19/12/127501

中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127501-127501.doi: 10.1088/1674-1056/19/12/127501

Magnetic and transport properties of Dy substituted layered perovskite La_1.3Sr_1.7Mn₂O₇

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

(1)Department of Physics, Baotou Normal University, Baotou 014030, China; (2)State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2010-07-02 修回日期:2010-09-16 出版日期:2010-12-15 发布日期:2010-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 50862007) and the Inner Mongolia Natural Science Foundation of China (Grant No. 2009MS0101).

Magnetic and transport properties of Dy substituted layered perovskite La_1.3Sr_1.7Mn₂O₇

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)

^a Department of Physics, Baotou Normal University, Baotou 014030, China; ^b State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2010-07-02 Revised:2010-09-16 Online:2010-12-15 Published:2010-12-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 50862007) and the Inner Mongolia Natural Science Foundation of China (Grant No. 2009MS0101).

摘要/Abstract

摘要： The effect of Dy substitution for La site in layered manganese oxides La_1.3Sr_1.7Mn₂O₇ 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 La_1.3Sr_1.7Mn₂O₇, so there is only one insulator–metal transition in the ρ–T curve of the sample with x=0.05 and x=0.1.

Abstract: The effect of Dy substitution for La site in layered manganese oxides La_1.3-xDy_xSr_1.7Mn₂O₇ 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 La_1.3Sr_1.7Mn₂O₇, so there is only one insulator–metal transition in the $\rho$–T curve of the sample with x=0.05 and x=0.1.

Key words: magnetic property, electrical property, magnetoresistance, metal–insulator transition

中图分类号: (Impurities in crystals)

61.72.S-

72.80.Sk (Insulators) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)

郑琳, 鲁毅, 赵建军, 张向群, 邢茹, 吴鸿业, 金香, 周敏, 成昭华. Magnetic and transport properties of Dy substituted layered perovskite La_1.3Sr_1.7Mn₂O₇[J]. 中国物理B, 2010, 19(12): 127501-127501.

Zheng Lin(郑琳), Lu Yi(鲁毅), Zhao Jian-Jun(赵建军), Zhang Xiang-Qun(张向群), Xing Ru(邢茹), and Wu Hong-Ye(吴鸿业), Jin Xiang(金香), Zhou Min(周敏), and Cheng Zhao-Hua(成昭华). Magnetic and transport properties of Dy substituted layered perovskite La_1.3Sr_1.7Mn₂O₇[J]. Chin. Phys. B, 2010, 19(12): 127501-127501.

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Magnetic and transport properties of Dy substituted layered perovskite La_1.3Sr_1.7Mn₂O₇

Magnetic and transport properties of Dy substituted layered perovskite La_1.3Sr_1.7Mn₂O₇

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