Structural and pyroelectric properties of sol-gel derived multiferroic BFO thin films

Seo Hyeon Jo; Sung Gap Lee; Seung Hwan Lee

doi:10.1016/j.materresbull.2011.11.009

Structural and pyroelectric properties of sol-gel derived multiferroic BFO thin films

Seo Hyeon Jo, Sung Gap Lee, Seung Hwan Lee

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

40 Scopus citations

Abstract

Multiferroic BFO/PZT multilayer films were fabricated by spin-coating method on the (1 1 1)Pt/Ti/SiO ₂/Si substrate alternately using PZT(30/70), PZT(70/30) and BFO alkoxide solutions. The structural and ferroelectric properties were investigated for uncooled infrared detector applications. The coating and heating procedure was repeated six times to form BFO/PZT multilayer films. All films showed the typical XRD patterns of the perovskite polycrystalline structure without presence of the second phase such as Bi ₂Fe ₄O ₃. The thickness of BFO/PZT multilayer film was about 200-220 nm. The ferroelectric properties such as dielectric constant, remnant polarization and pyroelectric coefficient were superior to those of single composition BFO film, and those values for BFO/PZT(70/30) multilayer film were 288, 15.7 μC/cm ² and 9.1 × 10 ^-9 C/cm ² K at room temperature, respectively. Leakage current density of the BFO/PZT(30/70) multilayer film was 3.3 × 10 ^-9 A/cm ² at 150 kV/cm. The figures of merit, F _V for the voltage responsivity and F _D for the specific detectivity, of the BFO/PZT(70/30) multilayer film were 6.17 × 10 ^-11 Ccm/J and 6.45 × 10 ^-9 Ccm/J, respectively.

Original language	English
Pages (from-to)	409-412
Number of pages	4
Journal	Materials Research Bulletin
Volume	47
Issue number	2
DOIs	https://doi.org/10.1016/j.materresbull.2011.11.009
State	Published - Feb 2012
Externally published	Yes

Funding

This work was supported by the Korea Research Foundation (KRF) grant funded by the Korea government (MEST) (No. 2009-0077690 ).

Keywords

A. Ceramics
A. Multilayer
A. Thin films
D. Ferroelectricity

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10.1016/j.materresbull.2011.11.009

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title = "Structural and pyroelectric properties of sol-gel derived multiferroic BFO thin films",

abstract = "Multiferroic BFO/PZT multilayer films were fabricated by spin-coating method on the (1 1 1)Pt/Ti/SiO 2/Si substrate alternately using PZT(30/70), PZT(70/30) and BFO alkoxide solutions. The structural and ferroelectric properties were investigated for uncooled infrared detector applications. The coating and heating procedure was repeated six times to form BFO/PZT multilayer films. All films showed the typical XRD patterns of the perovskite polycrystalline structure without presence of the second phase such as Bi 2Fe 4O 3. The thickness of BFO/PZT multilayer film was about 200-220 nm. The ferroelectric properties such as dielectric constant, remnant polarization and pyroelectric coefficient were superior to those of single composition BFO film, and those values for BFO/PZT(70/30) multilayer film were 288, 15.7 μC/cm 2 and 9.1 × 10 -9 C/cm 2 K at room temperature, respectively. Leakage current density of the BFO/PZT(30/70) multilayer film was 3.3 × 10 -9 A/cm 2 at 150 kV/cm. The figures of merit, F V for the voltage responsivity and F D for the specific detectivity, of the BFO/PZT(70/30) multilayer film were 6.17 × 10 -11 Ccm/J and 6.45 × 10 -9 Ccm/J, respectively.",

keywords = "A. Ceramics, A. Multilayer, A. Thin films, D. Ferroelectricity",

author = "Jo, \{Seo Hyeon\} and Lee, \{Sung Gap\} and Lee, \{Seung Hwan\}",

year = "2012",

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doi = "10.1016/j.materresbull.2011.11.009",

language = "English",

volume = "47",

pages = "409--412",

journal = "Materials Research Bulletin",

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T1 - Structural and pyroelectric properties of sol-gel derived multiferroic BFO thin films

AU - Jo, Seo Hyeon

AU - Lee, Sung Gap

AU - Lee, Seung Hwan

PY - 2012/2

Y1 - 2012/2

N2 - Multiferroic BFO/PZT multilayer films were fabricated by spin-coating method on the (1 1 1)Pt/Ti/SiO 2/Si substrate alternately using PZT(30/70), PZT(70/30) and BFO alkoxide solutions. The structural and ferroelectric properties were investigated for uncooled infrared detector applications. The coating and heating procedure was repeated six times to form BFO/PZT multilayer films. All films showed the typical XRD patterns of the perovskite polycrystalline structure without presence of the second phase such as Bi 2Fe 4O 3. The thickness of BFO/PZT multilayer film was about 200-220 nm. The ferroelectric properties such as dielectric constant, remnant polarization and pyroelectric coefficient were superior to those of single composition BFO film, and those values for BFO/PZT(70/30) multilayer film were 288, 15.7 μC/cm 2 and 9.1 × 10 -9 C/cm 2 K at room temperature, respectively. Leakage current density of the BFO/PZT(30/70) multilayer film was 3.3 × 10 -9 A/cm 2 at 150 kV/cm. The figures of merit, F V for the voltage responsivity and F D for the specific detectivity, of the BFO/PZT(70/30) multilayer film were 6.17 × 10 -11 Ccm/J and 6.45 × 10 -9 Ccm/J, respectively.

AB - Multiferroic BFO/PZT multilayer films were fabricated by spin-coating method on the (1 1 1)Pt/Ti/SiO 2/Si substrate alternately using PZT(30/70), PZT(70/30) and BFO alkoxide solutions. The structural and ferroelectric properties were investigated for uncooled infrared detector applications. The coating and heating procedure was repeated six times to form BFO/PZT multilayer films. All films showed the typical XRD patterns of the perovskite polycrystalline structure without presence of the second phase such as Bi 2Fe 4O 3. The thickness of BFO/PZT multilayer film was about 200-220 nm. The ferroelectric properties such as dielectric constant, remnant polarization and pyroelectric coefficient were superior to those of single composition BFO film, and those values for BFO/PZT(70/30) multilayer film were 288, 15.7 μC/cm 2 and 9.1 × 10 -9 C/cm 2 K at room temperature, respectively. Leakage current density of the BFO/PZT(30/70) multilayer film was 3.3 × 10 -9 A/cm 2 at 150 kV/cm. The figures of merit, F V for the voltage responsivity and F D for the specific detectivity, of the BFO/PZT(70/30) multilayer film were 6.17 × 10 -11 Ccm/J and 6.45 × 10 -9 Ccm/J, respectively.

KW - A. Ceramics

KW - A. Multilayer

KW - A. Thin films

KW - D. Ferroelectricity

UR - https://www.scopus.com/pages/publications/84855682383

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DO - 10.1016/j.materresbull.2011.11.009

M3 - Article

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VL - 47

SP - 409

EP - 412

JO - Materials Research Bulletin

JF - Materials Research Bulletin

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ER -

Structural and pyroelectric properties of sol-gel derived multiferroic BFO thin films

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