Diluted magnetic semiconductors

Details Diluted magnetic semiconductors Diluted magnetic semiconductors

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990umd..reptq....a&link_type=abstract

Final Report, 1 Apr. 1985 - 31 Dec. 1989 Maryland Univ., College Park. Dept. of Physics.

Physics

Avalanche Diodes, Inorganic Chemistry, Liquid Phase Epitaxy, Magnetic Materials, Magnetoresistivity, Semiconductors (Materials), Cadmium, Crystals, Magnetization, Optical Properties, Recrystallization, Spectroscopy

Scientific paper

Growth and physical properties of diluted magnetic semiconductors (DMS) were investigated. Growth included Bridgman, solid state recrystallization, and liquid phase epitaxy of Mercury(1-x)Manganese(x)Telluride and Mercury(1-x-y)Manganese(x)Cadmium(y)Telluride. Very uniform crystals were produced by solid state recrystallization. Physical properties studied included magnetization, optical response, and magnetotransport. From magnetization, the exchange interactions among magnetic ions have been deduced. Modulated spectroscopy gave details of the electronic structure of DMS and the quality of the material was indicated by the line widths. Magnetotransport, carried out in some cases to 30 T, showed a large negative magnetoresistance and subsequent increase. The Hg(1-x-y)Mn(x)Cd(y)Te has considerable promise for avalanche photodiodes between 1.2 and 1.8 micrometers.

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