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Spin-dependent phonon Raman scattering in CdCr2Se4

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
23
Issue
12
Identifiers
DOI: 10.1016/0038-1098(77)90727-x
Disciplines
  • Physics

Abstract

Abstract Influences of ferromagnetic ordering on the phonon Raman scattering are studied for CdCr 2Se 4 through the intensity measurements of Raman spectra between 25 and 300 K with various wavelengths of excitation light (488.0–676.4 nm). Spin-dependent enhancements of Raman cross section are observed for optical phonon lines D(168 cm −1) and F(238 cm −1) with excitation wavelengths of about 630 and 550 nm, respectively. This kind of phenomenon in spinel-type chalcogen chromites seems to originate in spin-dependent intermediate interactions in the excited states of specific electronic transitions with which the incident or scattered light is resonant.

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