Growth, vibrational, optical, dielectric, thermal and third order NLO single crystal of manganese(II) hydrogen maleate tetrahydrate

Abstract

ABSTRACTA nonlinear optical crystal of manganese(II) hydrogen maleate tetrahydrate (MHMT) is grown by slow evaporation technique at room temperature. The unit cell parameters of MHMT are confirmed by single crystal X-ray diffraction. A comprehensive FTIR and Raman spectral data of MHMT single crystal is presented. The UV-Vis-NIR spectrum is recorded from which the energy gap is evaluated confirms the possibility of charge transfer within the molecule. The gradual decomposition of the grown crystal by applying heat and hence the thermal stability is studied by means of TGA. The variation of dielectric constant (εr) and dielectric loss (tanδ) with frequency for temperatures 40–120 °C are studied. The electrical conductivity of MHMT crystal indicates the presence of mobile charge carriers in the crystal. Third-order nonlinear response is obtained using Z-scan technique with a He–Ne laser (632.8 nm). NLO parameters such as nonlinear absorption coefficient and third-order susceptibility are determined, which confirm that the crystal is a prospective candidate for applications in non-linear optics.