Landau theory of ferroelectric thin films and its relevance to RF filter design

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/66619

Title: Landau theory of ferroelectric thin films and its relevance to RF filter design
Author(s): Webb, Jeffrey F.
Abstract: Landau-Devonshire theory [1] is a phenomenological theory of ferroelectric materials which are characterized by having a spontaneous polarization below the Curie temperature C T . Various properties such as the dielectric constant can be modelled with this theory. Here we pay particular attention to how the polarization profile can be calculated and then show how, via the Landau-Khalatinkov equations, the response to an incident electromagnetic field can be calculated. Obviously, this is just the sort of information relevant to filters design in the sense that it is essentially the response to an electromagnetic field that is important, especially the wave nature apparent at high enough frequencies.
Publication type: Conference paper
Research centre: Swinburne University of Technology. Sarawak Campus. School of Engineering and Science
Source: Proceedings of the 2008 Asia Pacific Microwave Conference (APMC 2008), Hong Kong, 16-20 December 2008
Publication year: 2008
Keyword(s): Design; Electromagnetic radiation; Ferroelectric thin films; Filters
Publisher: IEEE
ISBN: 9781424426423
Publisher URL: http://dx.doi.org/10.1109/APMC.2008.4958699
Peer reviewed