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Magnetooptic rotation and thermal expansion of AgGaGeS4 crystals
1Adamenko D., 1Say A., 2Parasyuk O., 1Martynyuk-Lototska I. and 1Vlokh R.

1Vlokh Institute of Physical Optics, 23 Dragomanov Street, 79005 Lviv, Ukraine
2Department of Inorganic and Physical Chemistry, Eastern European National University, 13 Voli Ave., 43025 Lutsk, Ukraine

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Abstract. We have studied experimentally Faraday effect and thermal expansion for AgGaGeS4 crystals. The Verdet constant VF  and the effective Faraday coefficient F'11 are determined at the light wavelength l=632.8 nm under normal conditions. They are equal to VF  =(7.83±0.21)rad/(Tm) and F'33= 0.98F33+0.02F11=(1.40±0,04)10-13 m/A. The principal thermal expansion coefficients of AgGaGeS4 under normal conditions are equal to a11=(2.51±0.31)10-6K-1, a22=(3.98±0.26)10-6K-1 and a33=(5.63±0.36)10-6K-1. They are temperature-independent at 300–600 K.

Keywords: Faraday effect, AgGaGeS4 crystals, Verdet constant, thermal expansion

PACS: 33.55.Ad 
UDC: 537.632.4
Ukr. J. Phys. Opt. 17 105-111
doi: 10.3116/16091833/17/3/105/2016

Received: 22.06.2016

Анотація. У роботі експериментально досліджено термічне розширення і ефект Фарадея в кристалах AgGaGeS4. На довжині хвилі оптичного випромінювання l=632.8нм  за нормальних умов визначено сталу Верде VF  і ефективну компоненту тензора ефекту Фарадея F'33= 0.98F33+0.02F11  цих кристалів. Вони дорівнюють відповідно VF  =(7.83±0.21)рад/(Tлм) і (1.40±0,04)10-13 м/A. Головні коефіцієнти термічного розширення кристалів AgGaGeS4 за нормальних умов дорівнюють a11=(2.51±0.31)10-6K-1, a22=(3.98±0.26)10-6K-1 і a33=(5.63±0.36)10-6K-1. У діапазоні 300–600 K вони не залежать від температури.
 

 
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