Study of temperature and field dependence of ferroelectric thin films at microwave frequencies

Qingduan Meng*, Xueqiang Zhang, Fei Li, Jiandong Huang, Xiaohong Zhu, Dongning Zheng, Yusheng He, Qiang Luo, Changzhi Gu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Ferroelectric thin films (e.g. Ba0.5Sr0.5TiO 3) require systematic studies of their dielectric properties at microwave frequencies. We propose a new method employing comparisons between the measured and the simulated microwave responses of a coplanar waveguide (CPW) bandstop filter, which is made of the thin film to be studied. The temperature and field dependence of the dielectric constant and loss tangent of the ferroelectric thin film are then deduced from the systematic comparison studies. Attention is also paid to the effect of the temperature dependent conductivity of the conducting layer of the filter, which has a noticeable effect on both the resonant frequency and the Q value of the filter. For an accurate determination of the dielectric constant and loss tangent of the ferroelectric thin film, such effect should be carefully analyzed and eliminated.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages1669-1670
Number of pages2
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 10 Aug 200617 Oct 2006

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/TerritoryUnited States
CityOrlando, FL
Period10/08/0617/10/06

Keywords

  • BST
  • CPW
  • Dielectric properties

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