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Charge ordering modulations in Bi0.4Ca0.6MnO3 film with a thickness of 110 nm |
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 |
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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Received: 21 March 2012
Revised: 25 April 2012
Accepted manuscript online:
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PACS:
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75.25.Dk
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(Orbital, charge, and other orders, including coupling of these orders)
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61.05.J-
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(Electron diffraction and scattering)
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68.37.Og
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(High-resolution transmission electron microscopy (HRTEM))
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81.15.Fg
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(Pulsed laser ablation deposition)
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Corresponding Authors:
Wang Yi-Qian
E-mail: yqwang@qdu.edu.cn
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Cite this article:
Ding Yan-Hua (丁艳华), Wang Yi-Qian (王乙潜), Cai Rong-Sheng (蔡鎔声), Chen Yun-Zhong (陈允忠), Sun Ji-Rong (孙继荣 ) Charge ordering modulations in Bi0.4Ca0.6MnO3 film with a thickness of 110 nm 2012 Chin. Phys. B 21 087502
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