Magnetic and transport properties of Dy substituted layered perovskite La1.3Sr1.7Mn2O7 |
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| Authors: | Zheng Lin Lu Yi Zhao Jian-Jun Zhang Xiang-Qun Xing Ru Wu Hong-Ye Jin Xiang Zhou Min and Cheng Zhao-Hua |
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| Institution: | Department of Physics, Baotou Normal University, Baotou 014030, China;Department of Physics, Baotou Normal University, Baotou 014030, China;Department of Physics, Baotou Normal University, Baotou 014030, China;State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Department of Physics, Baotou Normal University, Baotou 014030, China;Department of Physics, Baotou Normal University, Baotou 014030, China;Department of Physics, Baotou Normal University, Baotou 014030, China;Department of Physics, Baotou Normal University, Baotou 014030, China;State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | 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. |
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| Keywords: | magnetic property electrical property magnetoresistance metal–insulator transition |
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