Charge ordering modulations in Bi0.4Ca0.6MnO3 film with a thickness of 110 nm |
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| Authors: | Ding Yan-Hua Wang Yi-Qian Cai Rong-Sheng Chen Yun-Zhong Sun Ji-Rong |
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| Institution: | a The Cultivation Base for State Key Laboratory, Qingdao University, Qingdao 266071, China;b College of Chemistry, Chemical Engineering and Environmental Engineering, Qingdao University, Qingdao 266071, China;c State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | 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. |
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| Keywords: | charge ordering selected-area electron diffraction high-resolution transmission electron microscopy pulsed laser deposition |
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