Ferroelectric properties of sol-gel prepared La- and Nd-substituted, and Nb-co-substituted bismuth titanate using polymeric additives

Jinheung Kim; Jong Kuk Kim; Soonyoung Heo; Ho Sueb Lee

doi:10.1016/j.tsf.2005.11.050

Ferroelectric properties of sol-gel prepared La- and Nd-substituted, and Nb-co-substituted bismuth titanate using polymeric additives

Jinheung Kim, Jong Kuk Kim, Soonyoung Heo, Ho Sueb Lee

Department of Chemistry & Nanoscience

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

17 Scopus citations

Abstract

La- or Nd-substituted bismuth titanate (BLT or BNT) and Nb-cosubstituted bismuth titanate (Nb-BLT or Nb-BNT) thin films were prepared in the presence of nonionic surfactants, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (EO_xPO_yEO_x) triblock copolymers, added as additives to the sol solution. For Nb-BLT films prepared with EO₁₀₆PO₇₀EO₁₀₆, the (200) orientation relative to (117) was dominant as compared with Nb-BLT films produced without surfactant or with EO₂₀PO₇₀EO ₂₀, and the remanent polarization (P_r) of the Nb-BLT film was 22 μC/cm², which was superior to 10 and 15 μC/cm ² of Nb-BLT films prepared without surfactant or with EO ₂₀PO₇₀EO₂₀. The additional Nb cosubstitution in BLT and BNT affected particle orientation in the films and resulted in higher ferroelectricity than those of the BLT and BNT films. The Nb-BNT/EO ₁₀₆PO₇₀EO₁₀₆ film showed the best ferroelectric properties; its remanent polarization was 30 μC/cm² and the polarization (P*-P∧) shows no significant change up to 8 × 10⁸ switching cycles.

Original language	English
Pages (from-to)	60-63
Number of pages	4
Journal	Thin Solid Films
Volume	503
Issue number	1-2
DOIs	https://doi.org/10.1016/j.tsf.2005.11.050
State	Published - 1 May 2006

Bibliographical note

Funding Information:
This work was supported by Korea Industrial Technology Foundation and Ministry of Commerce, Industry and Energy, by a grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology.

Keywords

Ferroelectric properties
Non ionic surfactant
Sol-gel
Substituted bismuth titanate

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10.1016/j.tsf.2005.11.050

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title = "Ferroelectric properties of sol-gel prepared La- and Nd-substituted, and Nb-co-substituted bismuth titanate using polymeric additives",

abstract = "La- or Nd-substituted bismuth titanate (BLT or BNT) and Nb-cosubstituted bismuth titanate (Nb-BLT or Nb-BNT) thin films were prepared in the presence of nonionic surfactants, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (EOxPOyEOx) triblock copolymers, added as additives to the sol solution. For Nb-BLT films prepared with EO106PO70EO106, the (200) orientation relative to (117) was dominant as compared with Nb-BLT films produced without surfactant or with EO20PO70EO 20, and the remanent polarization (Pr) of the Nb-BLT film was 22 μC/cm2, which was superior to 10 and 15 μC/cm 2 of Nb-BLT films prepared without surfactant or with EO 20PO70EO20. The additional Nb cosubstitution in BLT and BNT affected particle orientation in the films and resulted in higher ferroelectricity than those of the BLT and BNT films. The Nb-BNT/EO 106PO70EO106 film showed the best ferroelectric properties; its remanent polarization was 30 μC/cm2 and the polarization (P*-P∧) shows no significant change up to 8 × 108 switching cycles.",

keywords = "Ferroelectric properties, Non ionic surfactant, Sol-gel, Substituted bismuth titanate",

author = "Jinheung Kim and Kim, {Jong Kuk} and Soonyoung Heo and Lee, {Ho Sueb}",

note = "Funding Information: This work was supported by Korea Industrial Technology Foundation and Ministry of Commerce, Industry and Energy, by a grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology.",

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AU - Kim, Jinheung

AU - Kim, Jong Kuk

AU - Heo, Soonyoung

AU - Lee, Ho Sueb

N1 - Funding Information: This work was supported by Korea Industrial Technology Foundation and Ministry of Commerce, Industry and Energy, by a grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology.

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N2 - La- or Nd-substituted bismuth titanate (BLT or BNT) and Nb-cosubstituted bismuth titanate (Nb-BLT or Nb-BNT) thin films were prepared in the presence of nonionic surfactants, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (EOxPOyEOx) triblock copolymers, added as additives to the sol solution. For Nb-BLT films prepared with EO106PO70EO106, the (200) orientation relative to (117) was dominant as compared with Nb-BLT films produced without surfactant or with EO20PO70EO 20, and the remanent polarization (Pr) of the Nb-BLT film was 22 μC/cm2, which was superior to 10 and 15 μC/cm 2 of Nb-BLT films prepared without surfactant or with EO 20PO70EO20. The additional Nb cosubstitution in BLT and BNT affected particle orientation in the films and resulted in higher ferroelectricity than those of the BLT and BNT films. The Nb-BNT/EO 106PO70EO106 film showed the best ferroelectric properties; its remanent polarization was 30 μC/cm2 and the polarization (P*-P∧) shows no significant change up to 8 × 108 switching cycles.

AB - La- or Nd-substituted bismuth titanate (BLT or BNT) and Nb-cosubstituted bismuth titanate (Nb-BLT or Nb-BNT) thin films were prepared in the presence of nonionic surfactants, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (EOxPOyEOx) triblock copolymers, added as additives to the sol solution. For Nb-BLT films prepared with EO106PO70EO106, the (200) orientation relative to (117) was dominant as compared with Nb-BLT films produced without surfactant or with EO20PO70EO 20, and the remanent polarization (Pr) of the Nb-BLT film was 22 μC/cm2, which was superior to 10 and 15 μC/cm 2 of Nb-BLT films prepared without surfactant or with EO 20PO70EO20. The additional Nb cosubstitution in BLT and BNT affected particle orientation in the films and resulted in higher ferroelectricity than those of the BLT and BNT films. The Nb-BNT/EO 106PO70EO106 film showed the best ferroelectric properties; its remanent polarization was 30 μC/cm2 and the polarization (P*-P∧) shows no significant change up to 8 × 108 switching cycles.

KW - Ferroelectric properties

KW - Non ionic surfactant

KW - Sol-gel

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Ferroelectric properties of sol-gel prepared La- and Nd-substituted, and Nb-co-substituted bismuth titanate using polymeric additives

Abstract

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Keywords

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