La_(0.825)Sr_(0.175)MnO_3薄膜自旋输运特性研究  

SPIN TRANSPORT PROPERTY IN La_(0.825)Sr_(0.175)MnO_3 FILM

作　　者：金克新[1] 陈长乐[1] 王跃龙[1] 赵省贵[1] 王永仓[1] 汪世林[1] 袁孝[2] 宋宙模[1] 

机构地区：[1]西北工业大学应用物理系,西安710072 [2]华中科技大学激光技术国家重点实验室,武汉430074

出　　处：《低温物理学报》2004年第2期155-159,共5页Low Temperature Physical Letters

基　　金：国家自然基金 (项目编号 :6 0 1710 34);陕西省自然基金 (项目编号 :2 0 0 1C2 1);西北工业大学博士创新基金 (项目编号 :CX2 0 0 32 3)资助项目~~

摘　　要：本文通过固相反应方法制备了具有钙钛矿结构的稀土掺杂锰氧化物La0 .875Sr0 .12 5MnO3(LSMO)块材 ,并用磁控溅射方法在LaAlO3衬底上生长了厚度为 5 0nm的单晶薄膜 .X射线衍射仪分别对LSMO块材和薄膜材料进行分析 ,表明薄膜和衬底具有相同的钙钛矿结构 ;通过研究该薄膜光诱导效应和磁场下输运行为 ,发现其输运性质明显改变 ,表明外场改变体系的电子自旋输运特性 ,引起双交换作用减弱和增强 。Doped manganese oxide, La-{0.825}Sr-{0.175}MnO-3(LSMO), with perovskite structure was prepared by traditional solid reaction method. The thin film with thickness of 50nm was deposited using a RF magnetron sputtering method on LaAlO-3 Substrate. The X-ray diffraction of the film and the block indicated that LSMO film and LaAlO-3 substrate had the same perovskite structure. The transport property of the film was obviously changed by optical and magnetic fields. And it was thought to be the external fields which had influenced on the system of spin system.

关 键 词：掺杂锰氧化物 光诱导效应 自旋输运特性 双交换作用 钙钛矿结构 磁控溅射法 锰酸锶镧薄膜 

分 类 号：O484[理学—固体物理]