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Spectral features of absorption were studied for novel AgGaGe3Se7.6Te0.4 solid-state alloys at different temperatures. The synthesized crystals structure parameters are obtained by the X-ray Rietveld refinement method. During increasing temperature from 100 up to 300 K, the energy gap of AgGaGe3Se7.6Te0.4 decreases linearly from 2.05 up to 1.94 eV at a rate 5.7 × 10−4 еV/K. The magnitudes of piezoelectric...
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