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

Journal Article · Mon Oct 21 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4826705· OSTI ID:22217895

De Vries, B.; Vantomme, A. ^[1]; Wahl, U. ^[2]; Ruffenach, S.; Briot, O. ^[3]

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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)

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.

• OSTI ID: 22217895
• Journal Information: Applied Physics Letters, Vol. 103, Issue 17; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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