Compositionally graded epitaxial barium strontium titanate thin films derived from pulsed laser deposition

S. G. Lu; X. H. Zhu; Chee Leung Mak; K. H. Wong; H. L W Chan; C. L. Choy

doi:10.1016/S0254-0584(02)00279-1

Compositionally graded epitaxial barium strontium titanate thin films derived from pulsed laser deposition

S. G. Lu, X. H. Zhu, Chee Leung Mak, K. H. Wong, H. L W Chan, C. L. Choy

Research output: Journal article publication › Journal article › Academic research › peer-review

16 Citations (Scopus)

Abstract

Epitaxial graded barium strontium titanate (BaxSr1-x)TiO3(x = 0.75, 0.8, 0.9, 1.0) thin films were prepared through pulsed laser deposition method on the (La0.7Sr0.3)MnO3(LSMO)/LaAlO3(LAO) substrate. XRD analysis indicated the graded film had a broadened 2θ peak at 45° for the (2 0 0) peak. The energy dispersive analysis of X-ray (EDAX) showed a gradient change of Ba/Sr composition. P-E loop measurement gave a remnant polarization about 2μC cm-2, and without big up offset observed. A big room temperature dielectric constant as high as 1600 was obtained and has an approximately linear relationship with temperature from room temperature to 130°C. All these results can be ascribed to the epitaxial and graded structure of BST thin films.

Original language	English
Pages (from-to)	164-168
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	79
Issue number	2-3
DOIs	https://doi.org/10.1016/S0254-0584(02)00279-1
Publication status	Published - 10 Apr 2003

Keywords

BST
Compositional gradient
Dielectric constant
PLD
Thin films

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

More information

10.1016/S0254-0584(02)00279-1

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title = "Compositionally graded epitaxial barium strontium titanate thin films derived from pulsed laser deposition",

abstract = "Epitaxial graded barium strontium titanate (BaxSr1-x)TiO3(x = 0.75, 0.8, 0.9, 1.0) thin films were prepared through pulsed laser deposition method on the (La0.7Sr0.3)MnO3(LSMO)/LaAlO3(LAO) substrate. XRD analysis indicated the graded film had a broadened 2θ peak at 45° for the (2 0 0) peak. The energy dispersive analysis of X-ray (EDAX) showed a gradient change of Ba/Sr composition. P-E loop measurement gave a remnant polarization about 2μC cm-2, and without big up offset observed. A big room temperature dielectric constant as high as 1600 was obtained and has an approximately linear relationship with temperature from room temperature to 130°C. All these results can be ascribed to the epitaxial and graded structure of BST thin films.",

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T1 - Compositionally graded epitaxial barium strontium titanate thin films derived from pulsed laser deposition

AU - Lu, S. G.

AU - Zhu, X. H.

AU - Mak, Chee Leung

AU - Wong, K. H.

AU - Chan, H. L W

AU - Choy, C. L.

PY - 2003/4/10

Y1 - 2003/4/10

N2 - Epitaxial graded barium strontium titanate (BaxSr1-x)TiO3(x = 0.75, 0.8, 0.9, 1.0) thin films were prepared through pulsed laser deposition method on the (La0.7Sr0.3)MnO3(LSMO)/LaAlO3(LAO) substrate. XRD analysis indicated the graded film had a broadened 2θ peak at 45° for the (2 0 0) peak. The energy dispersive analysis of X-ray (EDAX) showed a gradient change of Ba/Sr composition. P-E loop measurement gave a remnant polarization about 2μC cm-2, and without big up offset observed. A big room temperature dielectric constant as high as 1600 was obtained and has an approximately linear relationship with temperature from room temperature to 130°C. All these results can be ascribed to the epitaxial and graded structure of BST thin films.

AB - Epitaxial graded barium strontium titanate (BaxSr1-x)TiO3(x = 0.75, 0.8, 0.9, 1.0) thin films were prepared through pulsed laser deposition method on the (La0.7Sr0.3)MnO3(LSMO)/LaAlO3(LAO) substrate. XRD analysis indicated the graded film had a broadened 2θ peak at 45° for the (2 0 0) peak. The energy dispersive analysis of X-ray (EDAX) showed a gradient change of Ba/Sr composition. P-E loop measurement gave a remnant polarization about 2μC cm-2, and without big up offset observed. A big room temperature dielectric constant as high as 1600 was obtained and has an approximately linear relationship with temperature from room temperature to 130°C. All these results can be ascribed to the epitaxial and graded structure of BST thin films.

KW - BST

KW - Compositional gradient

KW - Dielectric constant

KW - PLD

KW - Thin films

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U2 - 10.1016/S0254-0584(02)00279-1

DO - 10.1016/S0254-0584(02)00279-1

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SN - 0254-0584

VL - 79

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EP - 168

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Compositionally graded epitaxial barium strontium titanate thin films derived from pulsed laser deposition

Abstract

Keywords

ASJC Scopus subject areas

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