Microwave dielectric properties of disubstituted diacetylene DNP single crystals

Martin Dressel & Hans Wilhelm Helberg
The dielectric properties of dlsubstltuted diacetylene DNP single crystals were measured by microwaves In order to study the ferroelectric phase transition as a function of solid state polymerization. The high frequency properties of the permittivity were studied In DNP monomer and also in DNP crystals that were partially polymerized at a temperature of 130°C for different periods of time. At Tc = 46.5 K the dielectric constant of the monomer shows a sharp peak. No...
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