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Proceedings Paper

II-IV-V2 and I-III-VI2 nonlinear optical crystals for mid-IR range: Schottky defects concentration
Author(s): Valerii G. Voevodin; Olga Viktorovna Voevodina
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Paper Abstract

The work deals with ternary nonlinear optical crystals of I- III-VI2, and II-IV-V2-type. Theoretical thermodynamic method of quasi-chemical reactions was used. Entropy of vacancy was calculated as sum of configuration and vibration components. For the first one uncertainty in positions of new bonds formed by unpaired electrons arisen when one of consistent atoms is deleted and uncertainty in new positions of relaxing atoms were considered. Standard Boltzmann expression for configuration entropy (Delta) Sconf equals (Sigma) klnw and geometry considerations were used. It was assumed that the vibration component is caused by change in vibration frequency of atoms surrounding formed vacancy. Change in length of bonds and in bonding force took into account. Approximate expression for vibration entropy change (Delta) Svibr equals 3Nkln, geometry considerations and results of bonds lengths calculations were used.

Paper Details

Date Published: 4 November 1999
PDF: 7 pages
Proc. SPIE 3890, Fourth International Conference on Material Science and Material Properties for Infrared Optoelectronics, (4 November 1999); doi: 10.1117/12.368333
Show Author Affiliations
Valerii G. Voevodin, Siberian Physical-Technical Institute (Russia)
Olga Viktorovna Voevodina, Siberian Physical-Technical Institute (Russia)

Published in SPIE Proceedings Vol. 3890:
Fourth International Conference on Material Science and Material Properties for Infrared Optoelectronics
Fiodor F. Sizov, Editor(s)

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