Abstract
ANOMALOUS behaviour of magnesium in gallium arsenide has been reported by Edmond1 and Weisberg et al. 2, who found that magnesium behaves as a donor impurity, differing in this respect from zinc, cadmium and mercury. Edmond incorporated 5.7 × 1019 atoms/cm.3 of magnesium in his specimens and found it to be a donor impurity; however, Weisberg found magnesium to be a donor when present at low concentration, but an acceptor at levels higher than 4.4 × 1018 atoms/cm.3. The experimental methods employed by Weisberg are not known to me; however, Edmond prepared his specimens by heating gallium arsenide and magnesium together in sealed silica tubes for 1 hr. at 1,551° K., a small quantity of arsenic being added to prevent decomposition.
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References
Edmond, J. T., Proc. Phys. Soc., 73, Pt. 4, 622 (1959).
Weisberg, L. R., Rosi, F. D., and Herkart, P. G., Properties of Elemental and Compound Semiconductors, 5, edit by Gatos, H. C., (Interscience Pub., New York, 1960).
Kubaschewski, O., and Evans, E. Ll., Metallurgical Thermochemistry (Pergamon Press, 1958).
Darken, L. S., and Gurry, B. W., Physical Chemistry of Metals, 341 (McGraw-Hill Book Co., New York, 1953).
Kolm, C., Kulin, S. A., and Averbach, B. L., Phys. Rev., 108, 965 (1957).
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KNIGHT, J. Behaviour of Magnesium Impurity in Gallium Arsenide. Nature 190, 999–1000 (1961). https://doi.org/10.1038/190999a0
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DOI: https://doi.org/10.1038/190999a0
