The Tb Doping Effect on the Room Temperature Magnetoresistance in (La1-xTbx)0.67Sr0.33MnO3 (x≤ 0.4)

材料科学技术（英文）, 2004, 20(3): 350-352.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Department of Physics, Shandong University, Jinan 250100,China

2.Department of Physics, Shandong University, Jinan 250100,China;State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100,China

3.Department of Physics, Shandong University, Jinan 250100,China

4.Department of Physics, Shandong University, Jinan 250100,China

5.Department of Physics, Shandong University, Jinan 250100,China

6.State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100,China

基金项目: This work was supported by the National Natural Science Foundation of China No(59772040) Trans-Century Foundation of Educational Ministry of China Key Teacher Foundation

The Tb Doping Effect on the Room Temperature Magnetoresistance in (La1-xTbx)0.67Sr0.33MnO3 (x≤ 0.4)

Keywords： Magnetoresistance

With substitution of La by Tb in (La1-xTbx)0.67Sr0.33MnO3, the room temperature magnetoresistance AR/R0 drops at first, then undergoes an increase near x≈0.1, and finally drops again. The value of room temperature magnetoresistance at a field H=12 kOe for (La0.9Tb0.1)0.67Sr0.33MnO3 is -3.56%. The enhancement of the room temperature magnetoresistance induced by an appropriate Tb substitution in (La1-xTbx)0.67Sr0.33MnO3 is correlated with the shifts of the Curie temperature and metal-insulator temperature to near room temperature. The drop of the room temperature magnetoresistance at large Tb doping-contents may be due to its lower TC and TMI far from the room temperature.

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The Tb Doping Effect on the Room Temperature Magnetoresistance in (La1-xTbx)0.67Sr0.33MnO3 (x≤ 0.4)

参考文献