Crystal field splittings in dilute amorphous rare earth alloys

Inelastic neutron scattering has been used in an attempt to characterize the crystal field of isolated rare earth ions in an amorphous matrix. Amorphous yttrium copper alloys in which 5% of the yttrium was replaced by Ce, Pr, and Er were studied using neutron time-of-flight spectroscopy. Both the Ce...

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Bibliographic Details
Published in:Journal of applied physics 1982-01, Vol.53 (11), p.7725-7727
Main Authors: Rainford, B. D., Samadian, V., Begum, R. J., Lee, E. W., Burke, S. K.
Format: Article
Language:English
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Summary:Inelastic neutron scattering has been used in an attempt to characterize the crystal field of isolated rare earth ions in an amorphous matrix. Amorphous yttrium copper alloys in which 5% of the yttrium was replaced by Ce, Pr, and Er were studied using neutron time-of-flight spectroscopy. Both the Ce and Pr alloys showed quasielastic paramagnetic scattering at all temperatures between 15 and 300 K. The Er alloy however displayed a well defined inelastic peak centered at 2 meV at low temperatures which was identified with a crystal field transition. To our knowledge this is the first observation of a well-defined spectroscopic transition for rare earths in an amorphous environment.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.330150