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Effect of thermal annealing on the dielectric properties of KTiOPO4 single crystals

Satyanarayan, MN and Bhat, HL and Srinivasan, MR (1996) Effect of thermal annealing on the dielectric properties of KTiOPO4 single crystals. In: Journal of Applied Physics, 79 (6). pp. 3241-3245.

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Abstract

Dielectric properties of potassium titanyl phosphate have been investigated as a function of thickness and frequency, as well as annealing treatment under various atmospheres. The low frequency dielectric constant of KTP crystals is shown to depend upon the sample thickness, and this feature is attributed to the existence of surface layers. The frequency-dependent dielectric response of KTP exhibits a non-Debye type relaxation, with a distribution of relaxation times. The dielectric behavior of KTP samples annealed in various atmospheres shows that the low frequency dielectric constant is influenced by the contribution from the space charge layers. Prolonged annealing of the samples leads to a surface degradation, resulting in the formation of a surface layer of lower dielectric constant. This surface degradation is least when annealed in the presence of dry oxygen. From the analysis of the dielectric data using complex electric modulus, alpha(m) has been evaluated for the virgin and annealed samples. (C) 1996 American Institute of Physics.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American institute of physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 28 Apr 2011 06:05
Last Modified: 28 Apr 2011 06:05
URI: http://eprints.iisc.ernet.in/id/eprint/37134

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