Light scattering by spin excitations in copper-oxide-based materials

✍ Scribed by M.J. Konstantinović; Z.V. Popović

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 191 KB
• Volume: 23
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1996.0587

✦ Synopsis

In this paper we present a study of spin dynamics in CuO, Bi 2 CuO 4 and CuGeO 3 single crystals using Raman spectroscopy. The measurements of polarized Raman scattering spectra are performed in the temperature region from 10 to 300 K in various frequency ranges. We found and assigned the lines in the spectra that belong to magnetically ordered phases. The origin of these excitations, based on the temperature dependence of their energies, linewidths and symmetry arguments, is given. Also, we present calculations of two-magnon intensities, based on the densities of states, and compare them with experimental data.