电子元件与材料2011，Vol.30Issue(1)：17-20,24,5.
La0.7Ca0.3MnO3多晶薄膜的sol-gel法制备及表征
Preparation and characterization of Lao.7Ca0.3MnO3 polycrystal thin films prepared by sol-gel method
摘要
Abstract
Using glacial acetic acid as solvent and acetylacetone (AcAc) as chelating agent, polycrystal La0. 7Ca0.3MnO3 thin films on silicon (110) substrates were fabricated by sol-gel method with inorganic salts (La, Ca, Mn) instead of corresponding alkoxide. Obtained thin films were characterized by means of FTIR, XRD, SEM, EDS and TEM. The transport properties and CMR effect of the sample were studied through R-T curves at different magnetic field. The results show that the films have typical cubic perovskite crystal structure, their average grain size is about 30 nm and increases with the increase of annealing temperature; there are double peaks on the R-T curves, the high-temperature peak corresponds to the I-M phase transition accompanied by the PM-FM phase transition; and the low-temperature peak is attributed to grain boundary effect and tunneling effect; their magnetoresistance MR is about -38.0％ at 110 K.关键词
sol-gel法/La0.7Ca0.3MnO3薄膜/钙钛矿相/结构分析Key words
sol-gel method/ La0.7Ca0.3MnO3 thin films/ perovskite phase/ structural analysis分类
化学引用本文复制引用
杨亮亮,殷明志,常亮亮..La0.7Ca0.3MnO3多晶薄膜的sol-gel法制备及表征[J].电子元件与材料,2011,30(1):17-20,24,5.基金项目
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