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- W2021034850 abstract "Chromium doping is commonly employed to obtain high resistivity semi-insulating gallium arsenide. Four gallium arsenide crystals of 1 kg weight and one of approximately 3 kg weight have been grown by the LEC technique using 51 Cr as a radiotracer element. The effective segregation coefficient at the seed varies from 7.5 × 10 -4 for a melt concentration of 3 × 10 19 atoms cm -3 to 1.1 × 10 -3 for a melt containing 6.3 × 10 17 atoms cm -3 , in good agreement with published values. However, the effective segregation coefficients vary along the lengths of the crystals. Cr diffusion up the seed crystal has been detected to a distance of 1 cm from the melt/solid interface. Radial variations in chromium content are less than ± 15% over at least 80% of the pulled crystal. There is no marked pattern in the chromium distribution other than a tendency for the chromium concentration to be higher towards the outsides of the wafers." @default.
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- W2021034850 date "1982-11-01" @default.
- W2021034850 modified "2023-09-24" @default.
- W2021034850 title "Radiotracer determination of the distribution of chromium in lec gallium arsenide" @default.
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- W2021034850 doi "https://doi.org/10.1016/0022-0248(82)90178-6" @default.
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