Phase transition in ferroelectric SrBi2Ta2O9 thin films with change of heat-treatment temperature

Tetsuya Osaka, Akira Sakakibara, Tomonori Seki, Sachiko Ono, Ichiro Koiwa, Akira Hashimoto

Research output: Contribution to journalArticle

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Abstract

Changes in the composition and the crystal structure of micro-grains have been studied using transmission electron microscopy (TEM) and energy dispersive X-ray microanalysis in order to clarify the phase formation of ferroelectric SrBi2Ta2O9 (SBT) with heat-treatment at 650-750°C. Micrograins crystallized at 650°C begin to change to bismuth-layer-structure-family (BLSF) grains at temperatures exceeding 700°C, and form pure-BLSF phase grains at 800°C. Hence, a micrograins phase exists in thin films at 650-750°C and we determined that the bismuth composition in these grains decreases. Using selected diffraction and high-resolution TEM, we found that a pyrochlore phase was formed in the bismuth-poor micrograins that were heat treated at 750°C. The formation of pyrochlore made pure-phase BLSF difficult to obtain.

Original languageEnglish
Pages (from-to)597-601
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume37
Issue number2
Publication statusPublished - 1998 Feb

Fingerprint

Ferroelectric thin films
Bismuth
bismuth
heat treatment
Phase transitions
Heat treatment
thin films
Temperature
temperature
transmission electron microscopy
Microanalysis
High resolution transmission electron microscopy
Chemical analysis
microanalysis
Ferroelectric materials
Diffraction
Crystal structure
electron energy
Transmission electron microscopy
X rays

Keywords

  • All-alkoxide precursor solution
  • Bismuth-layer-structure
  • Chemical liquid deposition
  • Ferroelectric thin film
  • Heat-treatment temperature
  • Phase transition
  • Pyrochlore
  • Srbitao

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering(all)

Cite this

Phase transition in ferroelectric SrBi2Ta2O9 thin films with change of heat-treatment temperature. / Osaka, Tetsuya; Sakakibara, Akira; Seki, Tomonori; Ono, Sachiko; Koiwa, Ichiro; Hashimoto, Akira.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 37, No. 2, 02.1998, p. 597-601.

Research output: Contribution to journalArticle

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AU - Osaka, Tetsuya

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AU - Seki, Tomonori

AU - Ono, Sachiko

AU - Koiwa, Ichiro

AU - Hashimoto, Akira

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