中文摘要：

基于 Perovskite 的材料能广泛地在太空和交通地被使用。Perovskite 锰氧化物 La0.7Sr0.3MnO3 (LSMO ) 薄电影在 LaAlO3 (100 ) 和 Si (100 ) 单身者上被种由帮助聚合物的化学答案免职(PACSD ) 的水晶底层方法。不同底层上的 LSMO 薄电影的电子运输行为，微观结构，和磁致电阻(先生) 被调查。在 LaAlO3 底层上制作的 LSMO 电影的抵抗在 Si 底层上是比那小的。LSMO 的磁场还原剂抵抗在 Si 上拍摄两个并且在宽温度区域老挝人，当绝缘体金属转变温度变到更高的温度时。在在 1 T 的低温度范围的 Si 上的 LSMO 电影的低地的磁致电阻比 LSMO 电影在上的大老挝人。然而，在房间温度的老挝人的电影上的 LSMO 电影的 MR 是大约 5.17 % 。薄电影与一致 nanocrystal 尺寸谷物光滑、稠密。这些结果证明 PACSD 是为生产高质量的 LSMO 电影的一种有效技术，它是重要的改进磁性和汽车的传感器的申请。

英文摘要：

Perovskite-based materials can be widely used in the aerospace and transportation field. Perovskite man-ganese oxides La0.7Sr0.3MnO3 （LSMO） thin films were grown on LaAlO3 （100） and Si （100） single crystal sub-strates by the polymer-assisted chemical solution deposi-tion （PACSD） method. Electronic transport behavior, microstructure, and magnetoresistance （MR） of LSMO thin films on different substrates were investigated. The resis-tance of LSMO films fabricated on LaAlO3 substrates is smaller than that on the Si substrates. The magnetic field reduces resistance of LSMO films both on Si and LAO in the wide temperature region, when the insulator-metal transition temperature shifts to higher temperature. The low-field magnetoresistance of LSMO films on Si in low temperature range at 1 T is larger than that of LSMO films on LAO. However, the MR of LSMO film on LAO films at room-temperature is about 5.17%. The thin films are smooth and dense with uniform nanocrystal size grain. These results demonstrate that PACSD is an effective technique for producing high quality LSMO films, which is significant to improve the magnetic properties and the application of automotive sensor.