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Nanoscale observation of poling behaviors in Nd-substituted Bi 4Ti3O12 ferroelectric thin films

Title
Nanoscale observation of poling behaviors in Nd-substituted Bi 4Ti3O12 ferroelectric thin films
Authors
Shin R.H.Lee J.H.Kim G.Jo W.Kim D.H.Lee H.J.Kang J.
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2010
Journal Title
Japanese Journal of Applied Physics
ISSN
0021-4922JCR Link
Citation
vol. 49, no. 9 PART 1
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
In this study, the effects of oxygen vacancies on the local poling properties of Bi-layered ferroelectric thin films were examined. Bi 3.15Nd0.85Ti3O12 (BNT) thin films were coated on Pt(111)/Ti/SiO2/Si substrates using a sol-gel method. An oxygen vacancy of 2.4 ± 0.5% was observed mainly at the Bi 2O2 2+ 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 Bi2O2 2+ layers. © 2010 The Japan Society of Applied Physics.
DOI
10.1143/JJAP.49.091501
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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