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

Ran Hee Shin; Ji Hye Lee; Gracia Kim; William Jo; Dae Hyun Kim; Hyun Jin Lee; Jeongsoo Kang

doi:10.1143/JJAP.49.091501

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

Ran Hee Shin, Ji Hye Lee, Gracia Kim, William Jo, Dae Hyun Kim, Hyun Jin Lee, Jeongsoo Kang

Department of Physics

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

In this study, the effects of oxygen vacancies on the local poling properties of Bi-layered ferroelectric thin films were examined. Bi _3.15Nd_0.85Ti₃O₁₂ (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 ₂O₂²⁺ 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.

Original language	English
Article number	091501
Journal	Japanese Journal of Applied Physics
Volume	49
Issue number	9 PART 1
DOIs	https://doi.org/10.1143/JJAP.49.091501
State	Published - Sep 2010

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title = "Nanoscale observation of poling behaviors in Nd-substituted Bi 4Ti3O12 ferroelectric thin films",

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 2O22+ 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.",

author = "Shin, {Ran Hee} and Lee, {Ji Hye} and Gracia Kim and William Jo and Kim, {Dae Hyun} and Lee, {Hyun Jin} and Jeongsoo Kang",

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T1 - Nanoscale observation of poling behaviors in Nd-substituted Bi 4Ti3O12 ferroelectric thin films

AU - Shin, Ran Hee

AU - Lee, Ji Hye

AU - Kim, Gracia

AU - Jo, William

AU - Kim, Dae Hyun

AU - Lee, Hyun Jin

AU - Kang, Jeongsoo

PY - 2010/9

Y1 - 2010/9

N2 - 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 2O22+ 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.

AB - 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 2O22+ 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.

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

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