Growth, optical and thermal studies of pure and thiourea doped ammonium pentaborate nonlinear optical single crystals. (August 2015)

• Record Type: Journal Article
• Authors: Mani, G.; Rajarajan, K.; Lydia Caroline, M.; Sagayaraj, P.; Mohan, R.
• Is Part Of: Materials research innovations. Volume 19:Number 5(2015)
• Page Start: 318
• Page End: 323
• Publication Date: 2015-08
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1433075X14Y.0000000266
• Languages: German
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Single crystals of pure and thiourea doped ammonium pentaborate have been successfully grown by slow solvent evaporation technique. The growth conditions and surface morphology of pure and thiourea doped single crystals of APBO are optimised and the grown crystals are confirmed by X-ray diffraction. The crystals are characterised by Fourier transform infrared spectroscopy and UV-vis-NIR spectral techniques. The grown crystals of pure and thiourea doped APBO are subjected to thermal studies. The thermogravimetry and derivative thermogravimetry studies confirm that the decomposition of pure and doped crystals takes place in three different stages making them suitable for device fabrication for frequency conversion applications. The second harmonic generation of the crystals are confirmed by Nd∶YAG pulsed laser employing Kurtz powder technique and the influence of thiourea is also discussed. The Vicker microhardness test was carried out on the grown crystals to study the mechanical strength therein the Vicker's hardness number (Hv) and Work hardening coefficient (<italic>n</italic>) were calculated.</p> </abstract>