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Irradiated rare‐earth‐doped powellite single crystal probed by confocal Raman mapping and transmission electron microscopy
Author(s) -
Wang X.,
Panczer G.,
Ligny D.,
MottoRos V.,
Yu J.,
Dussossoy J. L.,
Peuget S.,
JóźwikBiala I.,
Bérerd N.,
Jagielski J.
Publication year - 2014
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4472
Subject(s) - raman spectroscopy , transmission electron microscopy , irradiation , materials science , single crystal , doping , scanning electron microscope , crystal (programming language) , analytical chemistry (journal) , crystallography , chemistry , optics , nanotechnology , optoelectronics , physics , chromatography , nuclear physics , composite material , programming language , computer science
The irradiation‐induced damages and structure modifications of rare earths doped powellite single crystal have been precisely studied using optical and electron microscopy techniques, including optical interferometry, confocal micro‐Raman spectroscopy and transmission electron microscopy. The surface of powellite crystal pops out anisotropically after exposing under Ar ion beam, with a saturation swelling value of 2.0% along a ‐axis and 1.3% along the c ‐axis of powellite at high dose. Raman mapping on focused ion‐beam sections (5 × 3 µm 2 ) perpendicular to the irradiated surface reveals that irradiation damage induces orientation‐dependent compressive stresses in powellite. However, no significant anisotropic effect has been found on the irradiation‐induced structural disorder in powellite. At low dose (0.012 dpa), the main irradiation‐induced defects created in powellite crystal are small defect clusters. By comparison, the dominant kinds of defects in high‐dose (5.0 dpa) sample are dislocations loops and networks. Copyright © 2014 John Wiley & Sons, Ltd.