Abstract
Homogeneous MnIn2S4 single crystals ∼14 mm in diameter and ∼40 mm long were grown by directional solidification of melt. For these MnIn2S4 single crystals, the composition was determined by electron probe microanalysis, structure by X-ray diffraction, and melting temperature by differential thermal analysis. Transmission spectra were studied in these single crystals, in the region of the intrinsic absorption edge within 10–300 K. The transmission spectra were used to determine the bandgap width, and it was plotted as a function of temperature. The thermal expansion of MnIn2S4 single crystals was studied dilatometrically in the range 80–700 K, and the thermal expansion coefficient was determined.
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