Diluted Magnetic Semiconductors

Abstract

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. (jg)

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Document Details

Document Type
Technical Report
Publication Date
Mar 26, 1990
Accession Number
ADA220444

Entities

People

  • James R. Anderson

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Avalanche Photodiodes
  • Crystal Growth
  • Crystals
  • Electric Fields
  • Energy Bands
  • Energy Gaps
  • Liquid Phase Epitaxy
  • Magnetic Fields
  • Magnetic Properties
  • Materials
  • Physical Properties
  • Resistance
  • Semiconductor Physics
  • Semiconductors
  • Solid State Physics
  • Spectroscopy
  • United States

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Semiconductor Device Technology
  • Superconducting Magnet Technology

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition
  • Microelectronics