中国物理B ›› 2012, Vol. 21 ›› Issue (8): 87502-087502.doi: 10.1088/1674-1056/21/8/087502
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
丁艳华a b, 王乙潜a, 蔡鎔声a b, 陈允忠c, 孙继荣c
Ding Yan-Hua (丁艳华)a b, Wang Yi-Qian (王乙潜)a, Cai Rong-Sheng (蔡鎔声)a b, Chen Yun-Zhong (陈允忠)c, Sun Ji-Rong (孙继荣 )c
摘要: Low temperature sample stage in transmission electron microscope is used to investigate the charge ordering behaviours in Bi0.4Ca0.6MnO3 film with a thickness of 110 nm at 103 K. Six different types of superlattice structures are observed using 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 far from the Bi0.4Ca0.6MnO3/SrTiO3 interface, and the possible reasons are discussed. Based on the experimental results, structural models are proposed for these localized modulated structures.
中图分类号: (Orbital, charge, and other orders, including coupling of these orders)