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Title: Influence of crystal mosaicity on axial channeling effects and lattice site determination of impurities

Using the electron emission channeling and Rutherford backscattering/channeling techniques, the influence of the mosaicity of a thin film on the axial channeling of charged particles was investigated. It is found that crystal mosaicity leads to a broadening and a degradation of the experimental channeling effects. This phenomenon, which is shown to be of major importance when assessing the lattice site of impurities in a single crystal, can be modeled quantitatively by using the mosaic tilt and twist components derived from X-ray rocking curve scans. As a case study, we illustrate that our approach allows to accurately determine the lattice site of Er in AlN, despite the significant influence of mosaicity on the channeling measurements.
Authors:
;  [1] ;  [2] ; ;  [3]
  1. Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven (Belgium)
  2. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 2686-953 Sacavém (Portugal)
  3. GES, Université de Montpellier II, 34095 Montpellier (France)
Publication Date:
OSTI Identifier:
22217895
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 17; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM NITRIDES; CHANNELING; CHARGED PARTICLES; ELECTRON EMISSION; IMPURITIES; MONOCRYSTALS; RUTHERFORD BACKSCATTERING SPECTROSCOPY; THIN FILMS; X-RAY DIFFRACTION