应力对La_(0.8)Ca_(0.2)MnO_3薄膜电输运性能的调控研究  

The Effect of Strain on Electrical Transport Properties in La_(0.8)Ca_(0.2)MnO_3 Films

作　　者：胡小飞[1,2] 姚洋[1,2] 华正和[2] 

机构地区：[1]宁夏大学物理与电气信息学院,宁夏银川750021 [2]淮阴师范学院物理与电子电气工程学院,江苏淮安223300

出　　处：《淮阴师范学院学报（自然科学版）》2014年第2期117-120,共4页Journal of Huaiyin Teachers College;Natural Science Edition

基　　金：江苏省高校大学生实践创新训练计划项目(2012JSSPITP2486)

摘　　要：采用脉冲激光沉积技术,在LaAlO3和0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3两种单晶基片上外延生长了La0.8Ca0.2MnO3薄膜.X射线衍射分析表明两种薄膜皆为单取向生长,且面内分别受到压应力和张应力作用.晶格失配造成的应力对薄膜的电阻和金属-绝缘相转变温度Tp影响很大.对LCMO/PMN-PT施加外电场,从而调节薄膜所受应力也可以调制其电阻和Tp.La0.8 Ca0.2 MnO3 thin films were epitaxially grown on LaAlO3 and 0.67Pb （Mg1/3 Nb2/3） O3-0.33 PbTiO3 crystal substrates by pulsed laser deposition technique .X ray diffraction analysis showed that the two kinds of films were single orientation grown , and the two films were under compressive and tensile stress respectively .Stress induced by lattice mismatch played great role on the resistance and metal-insulator phase transition temperature Tp of the films.Applying external electric field on LCMO/PMN-PT, thereby regulating the film stress, can also modulate the resistance and Tp .

关 键 词：LA0 8 CA0 2 MNO3 薄膜 应力 电运输性质 

分 类 号：O484.3[理学—固体物理]