Optimization of the electrical transport properties of La0.7Ca0.3MnO3 films by sintering temperature adjustment

被引：8
|
作者：
Jiang, Jiabin [1 ]
Guan, Xiaoli [1 ]
Gu, Xin [1 ]
Han, Jiamei [1 ]
Wu, Kaikai [1 ]
Zhao, Limin [1 ]
Yan, Yixin [1 ]
Zhu, Xiaokun [1 ]
Liu, Xiang [1 ]
机构：
[1] Kunming Univ Sci & Technol, Sch Mat Sci & Engn, Kunming 650093, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2023年 / 49卷 / 23期
基金：
中国国家自然科学基金;
关键词：
La; 0.7; Ca; 0.3; MnO; 3; films; Temperature coefficient of resistivity ( TCR); Sol -gel spin coating; Sintering temperatures ( T s ); POLYCRYSTALLINE CERAMICS; GIANT MAGNETORESISTANCE; THIN-FILMS; TCR; COEFFICIENT; RESISTIVITY; RESISTANCE; GROWTH;
D O I：
10.1016/j.ceramint.2023.09.148
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
With the development of the radiation thermometers, perovskite manganites have been fallen into the focus of highly sensitive infrared bolometers due to its metal-insulator transition properties. In this study, La0.7Ca0.3MnO3 (LCMO) films were prepared on (l00) LaAlO3 substrates using sol-gel spin-coating technology by adjusting different sintering temperatures (Ts, 1000 degrees C <= Ts <= 1400 degrees C). The analysis of the microstructure, surface morphology, ion valence state, and electrical transport properties revealed that the crystalline quality enhanced and the concentration of Mn4+ increased with the increasing of sintering temperature, promoting the DE effect and improving the electrical properties of the LCMO films. At Ts = 1200 degrees C, the temperature coefficient of re-sistivity (TCR) value of the LCMO film reached the maximum value (22.95% K-1) and corresponding peak TCR temperature of 246.85 K indicating that the LCMO film has great potential in infrared bolometers.
引用
收藏
页码：38174 / 38182
页数：9
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