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

doi:10.1088/1674-1056/21/8/087502

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

Charge ordering modulations in Bi_0.4Ca_0.6MnO₃ film with a thickness of 110 nm

丁艳华^{a b}, 王乙潜^a, 蔡鎔声^{a b}, 陈允忠^c, 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

收稿日期:2012-03-21 修回日期:2012-04-25 出版日期:2012-07-01 发布日期:2012-07-01

Charge ordering modulations in Bi_0.4Ca_0.6MnO₃ 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

Received:2012-03-21 Revised:2012-04-25 Online:2012-07-01 Published:2012-07-01
Contact: Wang Yi-Qian E-mail:yqwang@qdu.edu.cn

摘要/Abstract

摘要： Low temperature sample stage in transmission electron microscope is used to investigate the charge ordering behaviours in Bi_0.4Ca_0.6MnO₃ 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 Bi_0.4Ca_0.6MnO₃/SrTiO₃ interface from those in the region a little far from the Bi_0.4Ca_0.6MnO₃/SrTiO₃ interface, and the possible reasons are discussed. Based on the experimental results, structural models are proposed for these localized modulated structures.

关键词: charge ordering, selected-area electron diffraction, high-resolution transmission electron microscopy, pulsed laser deposition

Abstract: Low temperature sample stage in transmission electron microscope is used to investigate the charge ordering behaviours in Bi_0.4Ca_0.6MnO₃ 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 Bi_0.4Ca_0.6MnO₃/SrTiO₃ interface from those in the region a little far from the Bi_0.4Ca_0.6MnO₃/SrTiO₃ interface, and the possible reasons are discussed. Based on the experimental results, structural models are proposed for these localized modulated structures.

Key words: charge ordering, selected-area electron diffraction, high-resolution transmission electron microscopy, pulsed laser deposition

中图分类号: (Orbital, charge, and other orders, including coupling of these orders)

75.25.Dk

61.05.J- (Electron diffraction and scattering) 68.37.Og (High-resolution transmission electron microscopy (HRTEM)) 81.15.Fg (Pulsed laser ablation deposition)

丁艳华, 王乙潜, 蔡鎔声, 陈允忠, 孙继荣 . Charge ordering modulations in Bi_0.4Ca_0.6MnO₃ film with a thickness of 110 nm[J]. 中国物理B, 2012, 21(8): 87502-087502.

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 Bi_0.4Ca_0.6MnO₃ film with a thickness of 110 nm[J]. Chin. Phys. B, 2012, 21(8): 87502-087502.

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Charge ordering modulations in Bi_0.4Ca_0.6MnO₃ film with a thickness of 110 nm

Charge ordering modulations in Bi_0.4Ca_0.6MnO₃ film with a thickness of 110 nm

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