Diluted Magnetic Semiconductors

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Abstract:

Growth and physical properties of diluted magnetic semiconductors DMS were investigated. Growth included Bridgman, solid state recrystallization, and liquid phase epitaxy of Mercury1-xManganesexTelluride and Mercury1-x-yManganesexCadmiumyTelluride. 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 Hg1-x-yMnxCdyTe has considerable promise for avalanche photodiodes between 1.2 and 1.8 micrometers. jg

Author(s):
Anderson, James R.
Author Organization(s):
MARYLAND UNIV COLLEGE PARK DEPT OF PHYSICS AND ASTRONOMY
Descriptive Note:
Final rept. 1 Apr 1985-31 Dec 1989,
Pagination:
0007

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-22916.15-EL-A
Contract/Grant Number(s):
DAAG29-85-K-0052
Monitor Series:
22916.15-EL-A, ARO
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*MAGNETIC MATERIALS, *SEMICONDUCTORS, *DILUTION, SPECTROSCOPY, INTERACTIONS, PHYSICAL PROPERTIES, MATERIALS, EPITAXIAL GROWTH, CRYSTALS, QUALITY, LIQUID PHASES, RESPONSE, CADMIUM, WIDTH, MODULATION, MAGNETIZATION, EXCHANGE, SOLID STATE PHYSICS, RECRYSTALLIZATION, INORGANIC CHEMISTRY, MAGNETORESISTANCE, LINES(GEOMETRY), OPTICAL PROPERTIES, AVALANCHE DIODES, ELECTRONICS, IONS
Field(s)/Group(s):
Electrical and Electronic Equipment
Report Date:
1990 Mar 26