引用本文:
田世哲, 赵军钗, 乔从德, 姬相玲, 姜炳政. 微观结构对溶胶-凝胶法合成的La0.67Sr0.33MnO3电磁性能影响[J]. 应用化学,
2007, 24(7): 752-756.
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 La0.67Sr0.33MnO3 Prepared by Sol-Gel Route[J]. Chinese Journal of Applied Chemistry, 2007, 24(7): 752-756.
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 La0.67Sr0.33MnO3 Prepared by Sol-Gel Route[J]. Chinese Journal of Applied Chemistry, 2007, 24(7): 752-756.
微观结构对溶胶-凝胶法合成的La0.67Sr0.33MnO3电磁性能影响
English
Effect of Microstructure on Electric and Magnetic Properties of La0.67Sr0.33MnO3 Prepared by Sol-Gel Route
Abstract:
A series of La0.67Sr0.33MnO3 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.
-
Key words:
- perovskite
- / colossal magnetoresistance
- / grain boundary
- / sintering temperature
- / microstructure
-
-
扫一扫看文章
计量
- PDF下载量: 0
- 文章访问数: 0
- HTML全文浏览量: 0
下载:
