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Citation: TIAN Shi-Zhe, ZHAO Jun-Chai, QIAO Cong-De, JI Xiang-Ling, JIANG Bing-Zheng. Effect of Microstructure on Electric and Magnetic Properties of La_0.67Sr_0.33MnO₃ Prepared by Sol-Gel Route[J]. Chinese Journal of Applied Chemistry, ;2007, 24(7): 752-756. shu

Effect of Microstructure on Electric and Magnetic Properties of La_0.67Sr_0.33MnO₃ Prepared by Sol-Gel Route

1.
State Key laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Corresponding author: TIAN Shi-Zhe,
Received Date: 11 August 2006
Available Online: 26 September 2006
Fund Project: 国家自然科学基金资助项目(90101001) (90101001)中国科学院方向性项目(KJCX2-SW-H07) (KJCX2-SW-H07)"九七三"项目(G1999064800) (G1999064800)吉林省杰出青年基金资助项目(20050104) (20050104)吉林省科技厅和长春市科技局国际合作项目(20050702-2,04-03GH268) (20050702-2,04-03GH268)

A series of La_0.67Sr_0.33MnO₃ perovskite oxides was prepared by the sol-gel method.The grain sizes increase abnormally and the grain boundary effects are very prominent for the samples sintered at above 1 573 K.The magnetic strength increases with the sintering temperature.However,the Curie temperatures of all the samples keep constant.The metal-semiconductor behavior can be observed for the samples sintered at 1 173 K and 1 573 K.At proper sintering temperature,both tunneling magnetoresistance (TMR) and colossal magnetoresistance (CMR) can be observed.It indicates the transport of spintronics is related not only to the particle size and the density of the sample,but also to the microstructure of grain boundary.
- perovskite,
- colossal magnetoresistance,
- grain boundary,
- sintering temperature,
- microstructure
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Effect of Microstructure on Electric and Magnetic Properties of La0.67Sr0.33MnO3 Prepared by Sol-Gel Route

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Effect of Microstructure on Electric and Magnetic Properties of La_0.67Sr_0.33MnO₃ Prepared by Sol-Gel Route