2004年
Time-domain terahertz spectroscopy of strontium bismuth tantalate thin films
FERROELECTRIC THIN FILMS XII
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- 巻
- 784
- 号
- 開始ページ
- 339
- 終了ページ
- 344
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- 出版者・発行元
- MATERIALS RESEARCH SOCIETY
We have measured the dielectric and optical properties of pulsed laser deposited SrBi2Ta2O9 and Sr0.8Bi2.2Ta2O9 thin films on MgO substrate in THz frequency region by THz time-domain spectroscopy. The imaginary parts of the dielectric constant of both the samples show broad peaks in the frequency range 0.5-1.0 THz, which may be due to the soft mode in SBT in this frequency spectrum. The difference in the real part of the dielectric constant of Sr0.8Bi2.2Ta2O9 thin films is small for MHz and THz frequencies. On the other hand, the value of real part of dielectric constant of SrBi2Ta2O9 thin films in THz frequency range is much smaller than that in MHz frequency region, indicating that SrBi2Ta2O9 is not simply displacive ferroelectric material.
- リンク情報
- ID情報
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- ISSN : 0272-9172
- Web of Science ID : WOS:000222178100053