1993•FerroelectricsRequires access

Dielectric and pyroelectric properties of (CH3NH3)3Bi2Br9crystals in the ferroelectric phase transition region

R. Jakubas, G. Bator, J. Μróz

Abstract

In order to elucidate the nature of the spontaneous polarization the temperature measurements down to 10 K in (CH3NH3)3Bi2Br9 have been performed. The low frequency dielectric relaxation along the a-axis in the vicinity of ferroelectric phase transition clearly indicates the complex nature of dielectric response below T c3. The measurements showed that both the migration of charges and ferroelectric domains contribute to the electric permittivity in the ferroelectric phase.

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Key concepts: Ferroelectricity, Materials science, Dielectric, Pyroelectricity, Phase transition, Condensed matter physics, Permittivity, Polarization (electrochemistry)