Charge ordering modulations in a Bi0.4Ca0.6MnO3 film with a thickness of 110 nm

• 来源期刊: 中国物理B（英文版）
• 关键词: charge ordering selected-area electron diffraction high-resolution transmission electronmicroscopy pulsed laser deposition
• 年，卷（期）: 2012,（8）
• 页码范围: 482-486
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/21/8/087502

摘要

The low temperature sample stage in a transmission electron microscope is used to investigate the charge ordering behaviours in a Bi0.4Ca0.6MnO3 film with a thickness of 110 nm at 103 K.Six different types of superlattice structures are observed using the selected-area electron diffraction (SAED) technique,while three of them match well with the modulation stripes in high-resolution transmission electron microscopy (HRTEM) images.It is found that the modulation periodicity and direction are completely different in the region close to the Bi0.4Ca0.6MnO3/SrTiO3 interface from those in the region a little further from the Bi0.4Ca0.6MnO3/SrTiO3 interface,and the possible reasons for this are discussed.Based on the experimental results,structural models are proposed for these localized modulated structures.