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Proceedings Paper

Raman scattering by phonons and magnons in NicMg1-cO solid solutions
Author(s): E. Gazzanelli; A. Kuzmin; G. Mariotto; N. Mironova-Ulmane
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Paper Abstract

The Raman scattering by phonons and magnons was studied at room temperature in polycrystalline solid solutions NicMg1-cO and pure NiO. The experimental Raman spectrum of NiO consists of six well resolved bands, whose origin is due to the disorder-induced one-phonon scattering (bands at 400 and 500 cm-1), two-phonon scattering (bands at 750, 900 and 1100 cm-1) and two-magnon scattering (band at 1500 cm-1). In NicMg1-cO solid solutions, a relative increase of one-phonon scattering is observed upon a dilution of nickel oxide by magnesium ions: at room temperature, the two-magnon band becomes invisible for c < 0.7, whereas the two-phonon contribution disappears at c < 0.5. Such behavior is explained by disorder-induced effect, caused by chemical substitution and off-center displacement of nickel ions.

Paper Details

Date Published: 8 August 2003
PDF: 6 pages
Proc. SPIE 5122, Advanced Organic and Inorganic Optical Materials, (8 August 2003); doi: 10.1117/12.515707
Show Author Affiliations
E. Gazzanelli, INFM, Univ. della Calabria (Italy)
A. Kuzmin, Univ. of Latvia (Latvia)
G. Mariotto, INFM, Univ. degli Studi di Trento (Italy)
N. Mironova-Ulmane, Univ. of Latvia (Latvia)

Published in SPIE Proceedings Vol. 5122:
Advanced Organic and Inorganic Optical Materials
Andris Krumins; Donats Millers; Inta Muzikante; Andris Sternbergs; Vismants Zauls, Editor(s)

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