| La0.7Pb0.3MnO3薄膜的溶胶凝胶法制备及电特性研究 |
| |
| 引用本文： | 朱金山,韩建设,朱敏.La0.7Pb0.3MnO3薄膜的溶胶凝胶法制备及电特性研究[J].渭南师范学院学报,2010,25(5):38-40. |
| |
| 作者姓名： | 朱金山 韩建设 朱敏 |
| |
| 作者单位： | 西安科技大学,理学院,西安,710054 |
| |
| 基金项目： | 陕西省自然科学基金资助项目 |
| |
| 摘 要： | 利用溶胶凝胶法在单晶LaAlO3（100）衬底上成功的制备了La0.7Pb0.3MnO3外延膜.用X射线衍射仪、直流四探针法对其结构及电特性进行了研究.结果表明,薄膜为赝立方钙钛矿结构,晶胞参数为a=3.907nm.电阻率随着温度的增加,从金属导电行为向半导体行为转变,转变温度为TP=336K,利用双交换理论对此现象作了合理的解释.其电阻率在低温区时满足ρ=ρ0＋ρ1T2＋ρ2T4.5,其导电机制主要是电子与电子的散射,在T〉TMI时主要是小极化子输运.
|
| 关 键 词： | 薄膜 La0.7Pb0.3MnO3 溶胶凝胶法 电输运特性 |
Fabrication and Electric Properties of La0.7Pb0.3MnO3 Thin Film by Sol-gel Method |
| |
| ZHU Jin-shan,HAN Jian-she,ZHU Min.Fabrication and Electric Properties of La0.7Pb0.3MnO3 Thin Film by Sol-gel Method[J].Journal of Weinan Teachers College,2010,25(5):38-40. |
| |
| Authors: | ZHU Jin-shan HAN Jian-she ZHU Min |
| |
| Institution: | (College of Science,Xi＇an University of Science and Technology,Xi＇an 710054,China) |
| |
| Abstract: | Using sol-gel method,La0.7Pb0.3MnO3 thin films have been epitaxially grown on（100） LaAlO3 substrates.The thin film was characterized by X ray diffraction,direct current four-probe method.The results show that the thin film has a pseudo-cubic perovskite structure with the cell parameter a=3.907nm.There is a transition from the metal to insulator with the increment of the temperature;a reasonable explanation is given by double interaction theory.The transition temperature is 336K.The transport results show that the data is satisfied with ρ=ρ0 ＋ρ1T2＋ρ2T4.5 in the rang of TTP,the metal conductivity mechanism is electron versus electron scatting,and the insulator conductivity mechanism is small polaron. |
| |
| Keywords: | La0 7Pb0 3MnO3 |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
