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Effect of Cr doping in the bilayer manganite La1.4Sr1.6Mn2O7 |
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| Authors: | Gongqi Yu Bin XuJinming Xiong Xiangfei LiuLi Liu Songliu Yuan |
| Affiliation: | a The Second Artillery Command College, Wuhan 430012, People's Republic of China b Department of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450008, People's Republic of China c School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China |
| Abstract: | The effect of Cr doping on magnetic and electrical properties in the bilayer manganites La1.4Sr1.6(Mn1−yCry)2O7 (y=0-0.1) has been investigated. When y≤0.025, Cr doping enhances the three-dimensional magnetic transition temperature TC and the insulator-metal transition temperature TIM as well as decreases the peak resistivity at TIM, and the saturated magnetization decreases slightly. When y≥0.035, TIM decreases gradually accompanied by the increase of peak resistivity, but TC remains nearly constant, and the saturated magnetization decreases heavily. In the whole doping region, the two-dimensional magnetic transition temperature T? monotonously decreases with an increasing of Cr doping level. These results can be explained by considering different magnetic (including ferromagnetic and antiferromagnetic) interactions between Mn ions and Cr ions. |
| Keywords: | Bilayer manganite Double-exchange Magnetic interaction Phase separation |
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