Nanoscale Observation of Poling Behaviors in Nd-Substituted Bi4Ti3O12 Ferroelectric Thin Films
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概要
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In this study, the effects of oxygen vacancies on the local poling properties of Bi-layered ferroelectric thin films were examined. Bi3.15Nd0.85Ti3O12 (BNT) thin films were coated on Pt(111)/Ti/SiO2/Si substrates using a sol–gel method. An oxygen vacancy of $2.4\pm 0.5$% was observed mainly at the Bi2O22+ layers in the film that annealed in an oxygen-deficient atmosphere. The film containing oxygen vacancies showed a shift in the polarization–electric field hysteresis loop. Contact-mode electrostatic force microscopy revealed a domain pinning behavior in the BNT film with oxygen vacancies. The unpolarized domains were explained by the built-in field formed by the oxygen vacancies in the Bi2O22+ layers.
- 2010-09-25
著者
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Jo William
Department Of Physics Ewha Womans University
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Kim Dae
Department Of Anatomy And Center For Advanced Medical Education By Bk21 Project Inha University Coll
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Lee Ji
Department Of Advanced Materials Science And Engineering Sungkyunkwan University
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Kang Jeongsoo
Department Of Physics The Catholic University Of Korea
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Lee Hyun
Department Of Anesthesia And Pain Medicine School Of Medicine Pusan National University
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Shin Ran
Department of Physics, Ewha Womans University, Seoul 120-750, Korea
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Kim Gracia
Department of Physics, Ewha Womans University, Seoul 120-750, Korea
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Lee Hyun
Department of Physics, The Catholic University of Korea (CUK), Bucheon 420-743, Korea
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