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中文摘要：
应用偏靶射频磁控溅射方法在SrTiO3（001）单晶衬底上制备了三重价态（Mn3＋,Mn4＋,Mn5＋）锰氧化物薄膜La1-x-yCaxKyMnO3.这种薄膜具有钙钛矿结构,A位拥有La3＋,Ca2＋和K＋三种离子,对应的B位为Mn3＋,Mn4＋和Mn5＋三重价态离子共存.通过18kW高能X射线衍射仪和D8X射线面探衍射仪检测证实制备的薄膜为取向多晶薄膜.原子力扫描图像显示薄膜表面平整,且随薄膜厚度增加表面平整度起伏增大.表面光电压测试显示,该薄膜具有明显的光生电压信号.
英文摘要：
Thin films of the perovskite manganese oxides with three oxidation states of Mn3＋-Mn4＋-Mn5＋ were successfully prepared on the SrTiO3（001）substrates by off-axis radio frequency magnetron sputtering.The structure of the thin film is cubic with Pm3m space group,consisting of La3＋,Ca2＋ and K＋ three kinds of ions occupied in A sites and three oxidation states of manganese in B sites,respectively.The as-made La1-x-yCaxKyMnO3 thin films are oriented multi-crystal epitaxial forms,as tested by the high energy（18 kW）X-ray diffraction and D8 discover X-ray diffraction with General Area Detector Diffraction System（GADDS）.The AFM photographs show that the surface of the films is smoothy and the root-mean-square（RMS）increases along with the increase of the thickness.The results of the surface photovoltage（SPV）spectroscopy shows relatively strong signal,indicating the ability for the conversion of photoelectricity.
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