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Gray track formation in KTiOPO4 by swift ion irradiation

Deepthy, A and Rao, KSRK and Bhat, HL and Kumar, Ravi and Asokan, K (2001) Gray track formation in KTiOPO4 by swift ion irradiation. In: Journal of Applied Physics, 89 (11). pp. 6560-6562.

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Potassium titanyl phosphate single crystals were irradiated with 48 MeV lithium ions at fluences varying from 5×1012 to 1016 ions/cm2. The defects created in the crystal have been characterized using x-ray rocking curve measurements, optical transmittance, and photoluminescence spectroscopy. From x-ray rocking curve studies, the full width at half maximum for the irradiated samples was observed to increase, indicating lattice strain caused by the energetic ions. Optical transparency of these samples was found to decrease upon irradiation. The irradiated samples exhibited a broadband luminescence in the 700–900 nm region, for fluences above 5×1013 ions/cm2. The results indicate that ion-beam-induced optical effects in KTiOPO4 single crystals are very similar to the ones obtained for crystals with “gray tracks,” which are attributed to the electronic transitions in the Ti3+ levels.

Item Type: Journal Article
Publication: Journal of Applied Physics
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 26 Dec 2011 06:51
Last Modified: 26 Dec 2011 06:51
URI: http://eprints.iisc.ac.in/id/eprint/42892

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