Flexible (Ba0.7Sr0.3)TiO3 thick films with mechanically stable dielectric tunability

Jung Ehy Hong; Ying Chieh Hu; Young Joon Ko; Jong Hoon Jung; Do Hyeon Woo; Chang Young Koo

doi:10.1007/s40042-022-00591-y

Flexible (Ba_0.7Sr_0.3)TiO₃ thick films with mechanically stable dielectric tunability

Jung Ehy Hong, Ying Chieh Hu, Young Joon Ko, Jong Hoon Jung, Do Hyeon Woo, Chang Young Koo

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

1 Scopus citations

Abstract

We report the fabrication and electrical properties of flexible (Ba_0.7Sr_0.3)TiO₃ (BST) thick films. Fluorophlogopite mica substrates enable the growth of high-quality BST films because of their high melting temperature and flexible functionality for both concave and convex curvatures. The BST films are flat with quite small roughness of 4.2 nm, and dense without any pores or cracks. The BST films show a small remanent polarization of 3.8 μC/cm², a high dielectric constant of 1390 at 10 kHz, a small leakage current density of 2.2 × 10^–3 A/cm² at 200 kV/cm, and a dielectric tunability of 45%. The dielectric tunability is slightly higher for concave bending and is robust with respect to successive mechanical bending up to 10,000 cycles.

Original language	English
Pages (from-to)	664-668
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	81
Issue number	7
DOIs	https://doi.org/10.1007/s40042-022-00591-y
State	Published - Oct 2022

Bibliographical note

Publisher Copyright:
© 2022, The Korean Physical Society.

Keywords

(Ba,Sr)TiO
Dielectric tunability
Flexible film
Mechanical stability

Access to Document

10.1007/s40042-022-00591-y

Cite this

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title = "Flexible (Ba0.7Sr0.3)TiO3 thick films with mechanically stable dielectric tunability",

abstract = "We report the fabrication and electrical properties of flexible (Ba0.7Sr0.3)TiO3 (BST) thick films. Fluorophlogopite mica substrates enable the growth of high-quality BST films because of their high melting temperature and flexible functionality for both concave and convex curvatures. The BST films are flat with quite small roughness of 4.2 nm, and dense without any pores or cracks. The BST films show a small remanent polarization of 3.8 μC/cm2, a high dielectric constant of 1390 at 10 kHz, a small leakage current density of 2.2 × 10–3 A/cm2 at 200 kV/cm, and a dielectric tunability of 45\%. The dielectric tunability is slightly higher for concave bending and is robust with respect to successive mechanical bending up to 10,000 cycles.",

keywords = "(Ba,Sr)TiO, Dielectric tunability, Flexible film, Mechanical stability",

author = "Hong, \{Jung Ehy\} and Hu, \{Ying Chieh\} and Ko, \{Young Joon\} and Jung, \{Jong Hoon\} and Woo, \{Do Hyeon\} and Koo, \{Chang Young\}",

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T1 - Flexible (Ba0.7Sr0.3)TiO3 thick films with mechanically stable dielectric tunability

AU - Hong, Jung Ehy

AU - Hu, Ying Chieh

AU - Ko, Young Joon

AU - Jung, Jong Hoon

AU - Woo, Do Hyeon

AU - Koo, Chang Young

PY - 2022/10

Y1 - 2022/10

N2 - We report the fabrication and electrical properties of flexible (Ba0.7Sr0.3)TiO3 (BST) thick films. Fluorophlogopite mica substrates enable the growth of high-quality BST films because of their high melting temperature and flexible functionality for both concave and convex curvatures. The BST films are flat with quite small roughness of 4.2 nm, and dense without any pores or cracks. The BST films show a small remanent polarization of 3.8 μC/cm2, a high dielectric constant of 1390 at 10 kHz, a small leakage current density of 2.2 × 10–3 A/cm2 at 200 kV/cm, and a dielectric tunability of 45%. The dielectric tunability is slightly higher for concave bending and is robust with respect to successive mechanical bending up to 10,000 cycles.

AB - We report the fabrication and electrical properties of flexible (Ba0.7Sr0.3)TiO3 (BST) thick films. Fluorophlogopite mica substrates enable the growth of high-quality BST films because of their high melting temperature and flexible functionality for both concave and convex curvatures. The BST films are flat with quite small roughness of 4.2 nm, and dense without any pores or cracks. The BST films show a small remanent polarization of 3.8 μC/cm2, a high dielectric constant of 1390 at 10 kHz, a small leakage current density of 2.2 × 10–3 A/cm2 at 200 kV/cm, and a dielectric tunability of 45%. The dielectric tunability is slightly higher for concave bending and is robust with respect to successive mechanical bending up to 10,000 cycles.

KW - (Ba,Sr)TiO

KW - Dielectric tunability

KW - Flexible film

KW - Mechanical stability

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