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Title: (Ga,Fe)Sb: A p-type ferromagnetic semiconductor

A p-type ferromagnetic semiconductor (Ga{sub 1−x},Fe{sub x})Sb (x = 3.9%–13.7%) has been grown by low-temperature molecular beam epitaxy (MBE) on GaAs(001) substrates. Reflection high energy electron diffraction patterns during the MBE growth and X-ray diffraction spectra indicate that (Ga,Fe)Sb layers have the zinc-blende crystal structure without any other crystallographic phase of precipitates. Magnetic circular dichroism (MCD) spectroscopy characterizations indicate that (Ga,Fe)Sb has the zinc-blende band structure with spin-splitting induced by s,p-d exchange interactions. The magnetic field dependence of the MCD intensity and anomalous Hall resistance of (Ga,Fe)Sb show clear hysteresis, demonstrating the presence of ferromagnetic order. The Curie temperature (T{sub C}) increases with increasing x and reaches 140 K at x = 13.7%. The crystal structure analyses, magneto-transport, and magneto-optical properties indicate that (Ga,Fe)Sb is an intrinsic ferromagnetic semiconductor.
Authors:
; ;  [1] ;  [1] ;  [2]
  1. Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
22350802
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL STRUCTURE; CURIE POINT; ELECTRON DIFFRACTION; EXCHANGE INTERACTIONS; FERROMAGNETIC MATERIALS; GALLIUM ANTIMONIDES; GALLIUM ARSENIDES; HYSTERESIS; IRON COMPOUNDS; LAYERS; MAGNETIC CIRCULAR DICHROISM; MAGNETIC FIELDS; MAGNETIC SEMICONDUCTORS; MAGNETO-OPTICAL EFFECTS; MAGNETORESISTANCE; MOLECULAR BEAM EPITAXY; OPTICAL PROPERTIES; REFLECTION; SPECTRA; X-RAY DIFFRACTION