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Electrically and
magnetically induced optical rotation in Pb5Ge3O11:Cr crystals at the phase
transition.
2. Faraday effect in pure and Cr-doped lead
germanate in the presence of electric field and spontaneous polarization
Adamenko D., Klymiv I., Duda V.M., Vlokh R.
and Vlokh O.
Institute of Physical Optics, 23 Dragomanov St., 79005
Lviv, Ukraine
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This work presents the results for the Faraday rotation in pure and
Cr-doped lead germanate crystals studied in the course of proper ferroelectric
phase transition. We show that the increment of the Faraday rotation appearing
at the phase transition is caused by a combined magneto-electrooptic effect
induced by spontaneous polarization. It is proportional to the square of
spontaneous polarization. The phenomenon revealed by us corresponds to
combined effects of crystal optics, which appear due to common action of
different fields.
Keywords: Faraday effect, ferroelectric phase
transition, optical activity, lead germanate
PACS: 78.20.Ls, 78.20.Ek, 77.80.–e
Ukr. J. Phys. Opt.
8 98-105
doi: 10.3116/16091833/8/2/98/2007
Received: 19.04.2007
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