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- Title
The effect of magnesium chloride doping on structural, thermal, optical, nonlinear optical and electrical properties of Potassium Dihydrogen Phosphate single crystal.
- Authors
Manimekalai, K.; Jayaprakash, P.; Padmamalini, N.; Rama, S.
- Abstract
Employing the slow evaporation technique with millipore water as a solvent a single crystal of pure potassium dihydrogen phosphate crystal (KH2PO4) and KH2PO4 doped with magnesium chloride crystal (MCKH2PO4) were grown at room temperature. The powder X-ray diffraction studies show peaks of the MCKH2PO4 crystal coordinates well with the pure KH2PO4 with minute alterations to the strength of the diverged peaks. Investigations from single-crystal XRD show that KH2PO4 and MCKH2PO4 belong to tetragonal crystal system and I-42d space group, and their lattice parameters are also assessed. FTIR spectral analysis exhibits the functional group analysis of KH2PO4 and MCKH2PO4. The optical data such as transmittance and lower cutoff wavelength was investigated using UV–Vis-NIR spectral studies, and it is found to be 381 nm for pure KH2PO4 and 383 nm for MCKH2PO4. From Tau's plot, optical band gap is calculated to be 2.83 and 2.95 eV for KH2PO4 and MCKH2PO4, respectively. The SHG efficiency of KH2PO4 and MCKH2PO4 is measured using Kurtz-Perry powder technique. The calculated efficiency of MCKH2PO4 is found to be 1.02 times more than that of pure KH2PO4. At higher frequencies and temperatures, grown crystals have lower permittivity and dielectric loss tangent. The mechanical behavior of KH2PO4 and MCKH2PO4 is estimated using Vickers microhardness studies. Thermal analysis and decomposition temperature are determined by TGA and DTA studies. Third-order susceptibility is determined by the Z-scan technique.
- Subjects
POTASSIUM dihydrogen phosphate; TETRAGONAL crystal system; SINGLE crystals; MAGNESIUM chloride; DIELECTRIC loss; BAND gaps
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 3, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-09594-8