An effective way to suppress the pyrochlore phase formation in SBT thin films

Se Yeon Jung; Woo Chul Kwak; Seung Joon Hwang; Yun Mo Sung

doi:10.1557/proc-784-c11.33

An effective way to suppress the pyrochlore phase formation in SBT thin films

Se Yeon Jung, Woo Chul Kwak, Seung Joon Hwang, Yun Mo Sung

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

Abstract

Sr_0.7Bi_2.4Ta₂O₉ (SBT) thin films were deposited on Pt/Ti/SiO₂/Si substrates with and without a seed layer of ∼40 nm thickness using sol-gel and spin coating methods. The influence of seed layer on the phase formation characteristics of SBT thin films was investigated using x-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. Formation of pyrochlore as well as Aurivillius phase was observed in both the unseeded and seeded SBT films heated at 740°C. However, it was revealed that Aurivillius phase formation was enhanced in seeded SBT thin films and pyrochlore phase formation was highly suppressed. In this study, two possible mechanisms for the suppression of pyrochlore phase formation were proposed from the perspectives of activation energy difference for Aurivillius and pyrochlore phase formation and Bi-ion diffusion to pyrochlore phase.

Original language	English
Pages (from-to)	243-248
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	784
DOIs	https://doi.org/10.1557/proc-784-c11.33
Publication status	Published - 2003
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/proc-784-c11.33

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title = "An effective way to suppress the pyrochlore phase formation in SBT thin films",

abstract = "Sr0.7Bi2.4Ta2O9 (SBT) thin films were deposited on Pt/Ti/SiO2/Si substrates with and without a seed layer of ∼40 nm thickness using sol-gel and spin coating methods. The influence of seed layer on the phase formation characteristics of SBT thin films was investigated using x-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. Formation of pyrochlore as well as Aurivillius phase was observed in both the unseeded and seeded SBT films heated at 740°C. However, it was revealed that Aurivillius phase formation was enhanced in seeded SBT thin films and pyrochlore phase formation was highly suppressed. In this study, two possible mechanisms for the suppression of pyrochlore phase formation were proposed from the perspectives of activation energy difference for Aurivillius and pyrochlore phase formation and Bi-ion diffusion to pyrochlore phase.",

author = "Jung, {Se Yeon} and Kwak, {Woo Chul} and Hwang, {Seung Joon} and Sung, {Yun Mo}",

year = "2003",

doi = "10.1557/proc-784-c11.33",

language = "English",

volume = "784",

pages = "243--248",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

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T1 - An effective way to suppress the pyrochlore phase formation in SBT thin films

AU - Jung, Se Yeon

AU - Kwak, Woo Chul

AU - Hwang, Seung Joon

AU - Sung, Yun Mo

PY - 2003

Y1 - 2003

N2 - Sr0.7Bi2.4Ta2O9 (SBT) thin films were deposited on Pt/Ti/SiO2/Si substrates with and without a seed layer of ∼40 nm thickness using sol-gel and spin coating methods. The influence of seed layer on the phase formation characteristics of SBT thin films was investigated using x-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. Formation of pyrochlore as well as Aurivillius phase was observed in both the unseeded and seeded SBT films heated at 740°C. However, it was revealed that Aurivillius phase formation was enhanced in seeded SBT thin films and pyrochlore phase formation was highly suppressed. In this study, two possible mechanisms for the suppression of pyrochlore phase formation were proposed from the perspectives of activation energy difference for Aurivillius and pyrochlore phase formation and Bi-ion diffusion to pyrochlore phase.

AB - Sr0.7Bi2.4Ta2O9 (SBT) thin films were deposited on Pt/Ti/SiO2/Si substrates with and without a seed layer of ∼40 nm thickness using sol-gel and spin coating methods. The influence of seed layer on the phase formation characteristics of SBT thin films was investigated using x-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. Formation of pyrochlore as well as Aurivillius phase was observed in both the unseeded and seeded SBT films heated at 740°C. However, it was revealed that Aurivillius phase formation was enhanced in seeded SBT thin films and pyrochlore phase formation was highly suppressed. In this study, two possible mechanisms for the suppression of pyrochlore phase formation were proposed from the perspectives of activation energy difference for Aurivillius and pyrochlore phase formation and Bi-ion diffusion to pyrochlore phase.

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EP - 248

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

ER -

An effective way to suppress the pyrochlore phase formation in SBT thin films

Abstract

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