Growth structural thermal electrical and nonlinear optical properties of Yb3 doped KTiOPO4

Publication date: 1 July 2016
Source:Journal of Crystal Growth, Volume 445
Author(s): S. Sadhasivam, Rajesh Narayana Perumal, P. Ramasamy
The KTiOPO4:Yb (KTP:Yb) crystal has been grown by flux growth at high temperature (~1243−1223K ). KTP:Yb crystallizes in the orthorhombic crystal system with Pna21 space group. Ytterbium presence was analyzed in the grown crystal by EDAX analysis. The existence of Ti³⁺ color center has been evaluated using electron paramagnetic spin resonance spectrum. The Raman spectroscopic techniques were used to study the effect of Yb³⁺ in KTP crystal. Thermal diffusivity, thermal conductivity and specific heat capacity of grown crystal were studied. At low frequency, the dielectric constant decreases sharply in the frequency region of 10⁴Hz. The electrical conductivity along the [001] is low (9.0435×10⁻⁷S/cm) for 60kHz at 300K. The temperature dependent variation of electric conductivity was found for [010] and [001] of KTP:Yb. The effect of Yb³⁺ doping in second harmonic generation of KTP was studied.



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