Characteristics of the temperature dependence of the EPR spectrum of a layered GaSe:Gd crystal View Full Text


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Article Info

DATE

1998-01

AUTHORS

S. S. Ishchenko, A. A. Klimov

ABSTRACT

The temperature dependence of the axial constants b20 characterizing the fine structure of the EPR spectra of Gd3+ in a layered GaSe crystal is investigated. The compound GaSe:Gd contains three types of centers, in which Gd3+ is associated with Li+ or Na+ ions situated in the interlayer space. The influence of these ions on the phonon spectrum of the crystal is studied. It is shown that the lithium atoms are too small to have any appreciable influence on low-frequency optical vibrations (the E″ mode), which govern the behavior of the temperature curve. Here b20(T) remains linear in the temperature range well below the Debye temperature ΘD; this is a characteristic feature of layered structures. Sodium, on the other hand, completely suppresses the E″ mode, so that, for centers associated with it, the temperature dependence of b20(T) exhibits the same behavior as for ordinary (nonlayered) crystals, where linearity is observed only for T>ΘD. More... »

PAGES

55-56

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/1.1130231

DOI

http://dx.doi.org/10.1134/1.1130231

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1034003999


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