Vol.11, No.5 The effe ct of phosphate mix i ng on struc tura l 477
4. CONCLUSION
Single crystals of pure ZTS and 10 and 25 mol % of phosphate mixed ZTS have been grown by
slow evaporation method. Single crystal XRD studies reveal that no structural change in
phosphate mixed ZTS crystals. The presence of f unctional groups in grown cr ystals is identified
by FTIR spectral analysis. UV-Vis-NIR spectra shows broad transparency of pure ZTS and
phosphate mixed ZTS crystals lies between 300nm and 1100nm. Vicker hardness test show
increase in the hardness value of phosphate mixed ZTS crystals due to addition of phosphate in
ZTS lattice. SHG test reveals that 10 mol % of phosphate mixed ZTS crystal has greater SHG
efficiency than pure ZTS. Hence, it is concluded that due to its wide transparency range, high
hardness and greater SHG conversion efficiency 10 mol % of phosphate mixed ZTS crystal can
be a good engineering material for fabrication of nonlinear optical devices.
ACKNOWLEDGEMENTS
The authors are very grateful to Dr. P.K. Das, Indian Institute of Science, Bangalore (India) for
measurement of SHG efficiency and IIT, Chennai for FTIR spectrum. The authors thank
Madurai Kamaraj University, Madurai for single crystal XRD and St. Joseph’s College,
Tiruchirappalli for microhardness studies.
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