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Optical activity and the critical exponent of order parameter in lead germanate crystals. 
2. Electrogyration and dielectric properties of Pb5Ge3O11:Cu2+
1Adamenko D.I., 1Klymiv I.M., 1Vasylkiv Yu., 2Duda V.M., 2Ermakov A.S., 1Vlokh R.O.

1Institute of Physical Optics, 23 Dragomanov St., 79005 Lviv, Ukraine
2Oles’ Honchar Dnipropetrovsk National University, 13 Naukova St., 49050 Dnipropetrovsk, Ukraine

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The work is devoted to studies of electrogyration effect and temperature behaviour of dielectric permittivity in Pb5Ge3O11:Cu2+ crystals in the course of diffused phase transition. The concentrationtemperature phase diagram for the lead germanate doped with different concentrations of Cu ions is obtained.

Keywords: electrogyration, lead germanate, dielectric permittivity

PACS: 33.55.Ad, 77.80.Bh, 64.60.Fr, 77.84Bw, 78.20Wc, 61.72.Ww
UDC: 535.56
Ukr. J. Phys. Opt. 10 194-200 
doi: 10.3116/16091833/10/4/194/2009

Received: 03.11.2009

Анотація. Дана стаття присвячена вивченню температурної поведінки електрогіраційного ефекту та діелектричної проникливості в кристалах Pb5Ge3O11:Cu2+ при розмитому фазовому переході. Отримано концентраційно-температурну фазову діаграму для кристалів германату свинцю з різною концентрацією іонів Cu.
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