The frequency switchable multi-layered BST/BaTiO3 epitaxial film resonator

Takahiro Shimidzu; Takahiko Yanagitani; Kiyotaka Wasa

doi:10.1109/ULTSYM.2017.8091518

The frequency switchable multi-layered BST/BaTiO₃ epitaxial film resonator

Takahiro Shimidzu, Takahiko Yanagitani, Kiyotaka Wasa

School of Advanced Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

The frequency switchable filters are suitable for selecting the vacant frequency bands. Usual polarity unidirectional single-layered resonators excite 1^st mode whereas polarity inverted two-layered resonators excite 2^nd mode. We previous reported the frequency switchable two-layered PZT/PbTiO₃ epitaxial film resonators[1]. However, PbTiO₃ films grown on PZT/PbTiO₃ films are difficult to obtain since Curie temperature and deposition temperature in PbTiO₃ are higher than those of PZT. (Ba_x, Sr_1-x)TiO₃ (BST) films exhibit electrostrictive effect in paraelectric phase. In ferroelectric BaTiO₃, on the other hand, polarity inversion is impossible to be obtained without the application of higher than coercive electric field to films. Therefore, in this study, we considered that polarity inverted structure is easily obtained by application of less than coercive electric field of BaTiO₃ to two-layered BaTiO₃/BST epitaxial films. [1]T. Mori, et al., Proc. IUS 2016.

Original language	English
Title of host publication	2017 IEEE International Ultrasonics Symposium, IUS 2017
Publisher	IEEE Computer Society
ISBN (Electronic)	9781538633830
DOIs	https://doi.org/10.1109/ULTSYM.2017.8091518
Publication status	Published - 2017 Oct 31
Event	2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States Duration: 2017 Sept 6 → 2017 Sept 9

Publication series

Name	IEEE International Ultrasonics Symposium, IUS
ISSN (Print)	1948-5719
ISSN (Electronic)	1948-5727

Other

Other	2017 IEEE International Ultrasonics Symposium, IUS 2017
Country/Territory	United States
City	Washington
Period	17/9/6 → 17/9/9

ASJC Scopus subject areas

Acoustics and Ultrasonics

Access to Document

10.1109/ULTSYM.2017.8091518

Cite this

Shimidzu, T, Yanagitani, T & Wasa, K 2017, The frequency switchable multi-layered BST/BaTiO₃ epitaxial film resonator. in 2017 IEEE International Ultrasonics Symposium, IUS 2017., 8091518, IEEE International Ultrasonics Symposium, IUS, IEEE Computer Society, 2017 IEEE International Ultrasonics Symposium, IUS 2017, Washington, United States, 17/9/6. https://doi.org/10.1109/ULTSYM.2017.8091518

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title = "The frequency switchable multi-layered BST/BaTiO3 epitaxial film resonator",

abstract = "The frequency switchable filters are suitable for selecting the vacant frequency bands. Usual polarity unidirectional single-layered resonators excite 1st mode whereas polarity inverted two-layered resonators excite 2nd mode. We previous reported the frequency switchable two-layered PZT/PbTiO3 epitaxial film resonators[1]. However, PbTiO3 films grown on PZT/PbTiO3 films are difficult to obtain since Curie temperature and deposition temperature in PbTiO3 are higher than those of PZT. (Bax, Sr1-x)TiO3 (BST) films exhibit electrostrictive effect in paraelectric phase. In ferroelectric BaTiO3, on the other hand, polarity inversion is impossible to be obtained without the application of higher than coercive electric field to films. Therefore, in this study, we considered that polarity inverted structure is easily obtained by application of less than coercive electric field of BaTiO3 to two-layered BaTiO3/BST epitaxial films. [1]T. Mori, et al., Proc. IUS 2016.",

author = "Takahiro Shimidzu and Takahiko Yanagitani and Kiyotaka Wasa",

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N2 - The frequency switchable filters are suitable for selecting the vacant frequency bands. Usual polarity unidirectional single-layered resonators excite 1st mode whereas polarity inverted two-layered resonators excite 2nd mode. We previous reported the frequency switchable two-layered PZT/PbTiO3 epitaxial film resonators[1]. However, PbTiO3 films grown on PZT/PbTiO3 films are difficult to obtain since Curie temperature and deposition temperature in PbTiO3 are higher than those of PZT. (Bax, Sr1-x)TiO3 (BST) films exhibit electrostrictive effect in paraelectric phase. In ferroelectric BaTiO3, on the other hand, polarity inversion is impossible to be obtained without the application of higher than coercive electric field to films. Therefore, in this study, we considered that polarity inverted structure is easily obtained by application of less than coercive electric field of BaTiO3 to two-layered BaTiO3/BST epitaxial films. [1]T. Mori, et al., Proc. IUS 2016.

AB - The frequency switchable filters are suitable for selecting the vacant frequency bands. Usual polarity unidirectional single-layered resonators excite 1st mode whereas polarity inverted two-layered resonators excite 2nd mode. We previous reported the frequency switchable two-layered PZT/PbTiO3 epitaxial film resonators[1]. However, PbTiO3 films grown on PZT/PbTiO3 films are difficult to obtain since Curie temperature and deposition temperature in PbTiO3 are higher than those of PZT. (Bax, Sr1-x)TiO3 (BST) films exhibit electrostrictive effect in paraelectric phase. In ferroelectric BaTiO3, on the other hand, polarity inversion is impossible to be obtained without the application of higher than coercive electric field to films. Therefore, in this study, we considered that polarity inverted structure is easily obtained by application of less than coercive electric field of BaTiO3 to two-layered BaTiO3/BST epitaxial films. [1]T. Mori, et al., Proc. IUS 2016.

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