Charge ordering modulations in a Bi<sub>0.4</sub>Ca<sub>0.6</sub>MnO<sub>3</sub> film with a thickness of 110 nm |
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| Authors: | Ding Yan-Hua ab Wang Yi-Qian a Cai Rong-Sheng ab Chen Yun-Zhong c and Sun Ji-Rong |
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| Institution: | The Cultivation Base for State Key Laboratory,Qingdao University;College of Chemistry,Chemical Engineering and Environmental Engineering, Qingdao University;State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences |
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| Abstract: | The low temperature sample stage in a transmission electron microscope is used to investigate the charge ordering behaviours in a Bi 0.4 Ca 0.6 MnO 3 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 Bi 0.4 Ca 0.6 MnO 3 /SrTiO 3 interface from those in the region a little further from the Bi 0.4 Ca 0.6 MnO 3 /SrTiO 3 interface,and the possible reasons for this 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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