Pure and Lanthanam(La3+) doped Non Linear Optical single crystals of Urea L-Malic acid(ULMA) were grown successfully by slow evaporation technique. Crystalline natures of the grown crystals were confirmed by Powder XRD analysis. Doping has not altered the monoclinic structure of crystals. UV-Vis-NIR spectroscopic studies showed that, doped crystals exhibit low absorption in the visible region of the spectrum than the pure crystals. FTIR analyses exhibit the presence of various functional groups in the grown crystal. Dielectric studies showed the low value of dielectric constant / dielectric loss at high frequency region. Second Harmonic Generating (SHG) efficiency of pure and doped crystals is found as 3.0 times and 3.96 times than KDP.
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