上海大学学报(自然科学版)

• 材料科学与工程 • 上一篇    下一篇

溶胶-凝胶方法制备铁酸铋薄膜及膜厚的影响

俞圣雯,蔡金玉,严云飞,程晋荣   

  1. 上海大学 材料科学与工程学院,上海 200072
  • 收稿日期:2008-05-04 修回日期:1900-01-01 出版日期:2008-10-23 发布日期:2008-10-23
  • 通讯作者: 俞圣雯

BiFeO3 Thin Films Fabricated by Sol-gel Method and Its Thickness Dependence

YU Sheng-wen,CAI Jin-yu,YAN Yun-fei,CHENG Jin-rong
  

  1. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
  • Received:2008-05-04 Revised:1900-01-01 Online:2008-10-23 Published:2008-10-23
  • Contact: YU Sheng-wen

摘要: 以溶胶-凝胶方法制备不同厚度的铁酸铋(BiFeO3, BFO)薄膜,XRD分析表明,BFO薄膜呈钙钛矿相结构,且随着厚度的增加,薄膜的结晶性变好.而薄膜厚度为4层(200 nm)至8层(400nm)之间,其微观结构可能发生由赝立方相向三方相的转变.同时,随着膜厚的增加,BFO薄膜的介电性能得到改善,绝缘性能得到提高,铁电性能也相应地好转.

关键词: 薄膜, 厚度
,
溶胶凝胶, 铁酸铋

Abstract:

BiFeO3 thin films with different layers/thicknesses were fabricated on Pt(111)/Si(100) substrates by sol-gel method. XRD results indicate that a phase transition from pseudocubic to rhombohedral might happen between the films with thicknesses of 4 layers/200 nm and 8 layers/400 nm. With increasing thickness, the films exhibit better crystallinity and dielectric properties. Meanwhile, insulation and ferroelectricy are improved as well.

Key words: film, sol-gel, thickness, BiFeO3

中图分类号: