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Local vibrations of oxygen in Ge crystals grown from a melt fully covered by B 2 O 3 were evaluated by Fourier-transform infrared spectroscopy. Ge single crystals containing oxygen were grown by the Czochralski method under various growth conditions. Oxygen concentrations in the crystals were determined to be in the range between 8.5×10 15 and 5.5×10 17 cm −3 ...
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