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Title: Energy-loss magnetic chiral dichroism study of epitaxial MnAs film on GaAs(001)

The room-temperature ferromagnetic behavior of MnAs/GaAs(001) thin film has been locally explored by Transmission Electron Microscope (TEM). We first differentiated hexagonal α-MnAs and quasi-hexagonal β-MnAs which are very similar in atomic structure by electron diffraction. Local magnetic moment information of the identified α-MnAs was extracted from manganese-L{sub 2,3} edges using Energy-loss Magnetic Circular Dichroism technique and the ratio of orbital to spin magnetic moment was measured. In this experiment, atomic structure identification, chemical analysis, and magnetic moment measurement were simultaneously achieved at high spatial resolution in TEM, thus providing a potential method for in-situ study of local properties of multiphase magnetic materials.
Authors:
; ; ;  [1] ; ;  [2] ;  [3] ;  [2] ;  [3] ;  [3]
  1. CEMES-CNRS UPR 8011, Univ. Toulouse, F-31055 Toulouse (France)
  2. Sorbonne Universités, UPMC Univ. Paris 6, UMR 7588, INSP, 4 Place Jussieu, F-75005 Paris (France)
  3. (France)
Publication Date:
OSTI Identifier:
22489088
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 6; Other Information: (c) 2015 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; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHEMICAL ANALYSIS; CHIRALITY; ELECTRON DIFFRACTION; ENERGY LOSSES; EPITAXY; GALLIUM ARSENIDES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MATERIALS; MAGNETIC MOMENTS; MANGANESE; MANGANESE ARSENIDES; SPATIAL RESOLUTION; SPIN; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY