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Chin. Phys. B, 2012, Vol. 21(8): 087502    DOI: 10.1088/1674-1056/21/8/087502
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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

Ding Yan-Huaa b, Wang Yi-Qiana, Cai Rong-Shenga b, Chen Yun-Zhongc, Sun Ji-Rongc
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
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.
Keywords:  charge ordering      selected-area electron diffraction      high-resolution transmission electron microscopy      pulsed laser deposition     
Received:  21 March 2012      Published:  01 July 2012
PACS:  75.25.Dk (Orbital, charge, and other orders, including coupling of these orders)  
  61.05.J- (Electron diffraction and scattering)  
  68.37.Og (High-resolution transmission electron microscopy (HRTEM))  
  81.15.Fg (Pulsed laser ablation deposition)  
Corresponding Authors:  Wang Yi-Qian     E-mail:  yqwang@qdu.edu.cn

Cite this article: 

Ding Yan-Hua, Wang Yi-Qian, Cai Rong-Sheng, Chen Yun-Zhong, Sun Ji-Rong Charge ordering modulations in Bi0.4Ca0.6MnO3 film with a thickness of 110 nm 2012 Chin. Phys. B 21 087502

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