高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

薄膜三重价态锰氧化物的制备与性能

胡滨, 杨铭, 侯长民, 胡士奇, 袁宏明, 冯守华   

  1. 吉林大学无机合成与制备化学国家重点实验室, 化学学院, 长春 130012
  • 收稿日期:2008-10-09 修回日期:1900-01-01 出版日期:2008-12-10 发布日期:2008-12-10
  • 通讯作者: 冯守华

Thin Film Preparation and Property of the Perovskite Manganites with Three Oxidation States

HU Bin, YANG Ming, HOU Chang-Min, HU Shi-Qi, YUAN Hong-Ming, FENG Shou-Hua*   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2008-10-09 Revised:1900-01-01 Online:2008-12-10 Published:2008-12-10
  • Contact: FENG Shou-Hua

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被引次数

6

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18 kW高能X射线衍射仪和D8 X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.

关键词: 三重价态, 取向薄膜, 光生电压

Abstract: 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.

Key words: Three oxidation state, Epitaxial film, Photovoltage

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