Dielectric Response of Soft Modes in Ferroelectric Thin Films
Abstract
The concept of effective soft mode in thin films and its role in the effective dielectric response of high-permittivity thin films is introduced. Compared to bulk soft mode response, it may be strongly influenced by stresses from the substrate and dielectric inhomogeneities like interface layers, grain boundaries and porosity. The available techniques for the determination of the effective soft-mode response (far-infrared and time-domain THz spectroscopies) are discussed. The experiments on various ferroelectric (PbTiO 3, PZT, BaTiO 3, SrBi 2 Ta 2 O 9 ), incipient ferroelectric (SrTiO 3 ), doped incipient ferroelectric (SrTiO 3 :Ba), and relaxor ferroelectric (PLZT) films are briefly reviewed and compared with the results in bulk materials.
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Accurate knowledge of the substrate refractive index ns and thickness ds is crucial for the determination of THz dielectric spectra of the film.
“It is known [14] that the accurate knowledge of the substrate refractive index ns and thickness ds is crucial for the determination of THz dielectric spectra of the film.”
From Gouy shift correction for highly accurate refractive index retrieval in time-domain terahertz spectroscopy (2010) · cites this paper as [14]
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Phase-sensitive time-domain terahertz reflection spectroscopy
Pashkin, A., Kempa, M., Němec, H., Kadlec, F., & Kužel, P. (2003) · Review of Scientific Instruments · doi:10.1063/1.1614878 · Cited by 114 · see citing works
Self-citationKužel, P., Němec, H., Kadlec, F., & Kadlec, C. (2010) · Optics Express · doi:10.1364/oe.18.015338 · Cited by 111 · see citing works
Self-citation
- Authors
- Petzelt, J., Kužel, P., Rychetský, I., Pashkin, A., & Ostapchuk, T.
- Affiliations
- Czech Academy of Sciences (CZ)
- Venue
- Ferroelectrics
- Publisher
- Informa UK Limited
- Published
- 2003-01
- Volume
- 288
- Issue
- 1
- Pages
- 169-185
- ISSN
- 0015-0193 (ISSN-L)
- 1563-5112
- OpenAlex
- W2164191049
- Cited by
- 38
- References
- 0
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2014: 2 · 2013: 2 · 2012: 1
- FWCI
- 1.91
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Ferroelectrics (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Ferroelectric and Piezoelectric Materials
- Physical Sciences › Materials Science › Materials Chemistry › Solid-state spectroscopy and crystallography
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Multiferroics and related materials
- Keywords
- soft mode, ferroelectric thin films, dielectric response, high dielectric constant, substrate stress, dielectric inhomogeneity, interfacial layer, grain boundaries, porosity, far-infrared spectroscopy, lead titanate, lead zirconate titanate, barium titanate, SrBi2Ta2O9, SrTiO3, lead lanthanum zirconate titanate, relaxor ferroelectrics, incipient ferroelectrics
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