Magnetic and magnetoresistive properties of La0.65-xEuxSr0.35MnO3

作者：Feng Ming; Li Hai bo^*; Liu Mei; Li Na; Zheng Wei tao

来源：Ceramics International, 2009, 35(1): 345-347.

DOI：10.1016/j.ceramint.2007.11.004

• Sol-gel processes
• X-ray methods
• Electrical properties
• Magnetic properties
• Perovskites

Eu-doped perovskites La0.65-xEuxSr0.35MnO3 (0.05 <= x <= 0.30) were synthesized by sol-gel method using citric acid and characterized by X-ray diffraction, magnetization, resistivity and magnetoresistance (MR) experiments. All samples had a single hexagonal perovskite structure. As x increased from 0.05 to 0.30, the Curie temperature TC for the samples decreased from 352 to 242 K. It was found that two transition points appeared when the resistivity changed with increasing temperature, and upon an application of a magnetic field of 20 kOe the maximum magnetoresistivity of 18% for the La0.65-xEuxSr0.35MnO3 with x = 0.20 was obtained at room temperature 300 K. The mechanism of the transitions for the samples was explored.

• 出版日期2009-1
• 单位吉林师范大学; 吉林大学