Paraelectric in a Strong High-Frequency Field

Details Paraelectric in a Strong High-Frequency Field Paraelectric in a Strong High-Frequency Field

2009-01-16

arxiv.org/abs/0901.2421v1

Technical Physics Letters 34, No 5, 446-448, 2008

Physics

Condensed Matter

Materials Science

3 two-column pages

Scientific paper

10.1134/S106378500805026X

A change in the effective permittivity of a ferroelectric film in the paraelectric phase under the action of a strong high-frequency field (nonequilibrium soft mode heating) is considered. It is shown that this effect must be most clearly pronounced far from the resonance (\omega_0 << \omega_sm), rather than for the external field frequency \omega_0 close to the soft mode frequency \omega_sm. The effective permittivity as a function of the high-frequency field amplitude is calculated using the phenomenological approach and within the microscopic theory based on the simple model of a displacement-type ferroelectric.

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