One- and two-magnon and exciton Raman scattering in antiferromagnetic CoF2: Experiment and theory

Autor:	E. Meloche, Michael G. Cottam, David J. Lockwood
Rok vydání:	2013
Předmět:	Physics Condensed matter physics Magnon General Physics and Astronomy Polarization (waves) Light scattering symbols.namesake X-ray Raman scattering symbols Condensed Matter::Strongly Correlated Electrons Raman spectroscopy Anisotropy Néel temperature Raman scattering
Zdroj:	Journal of the Korean Physical Society. 63:817-820
ISSN:	1976-8524 0374-4884
DOI:	10.3938/jkps.63.817
Popis:	Experimental data are reported for the temperature and polarization dependence of the oneand two-magnon Raman light scattering in the rutile-structure antiferromagnet CoF2. The correspondingn Stokes and anti-Stokes Raman spectra are measured, emphasizing the temperature and polarization variations of the one-magnon frequency, line width, and integrated intensity. A Green's function method is employed to derive the excitation energies and their intensities over a broad range of temperatures (below the Néel temperature = 38 K) for a spin S = 3/2 anisotropic antiferromagnet with strong spin-orbit coupling. The exchange terms are analyzed using the random-phase approximation while single-ion anisotropy terms are treated exactly by generating a closed set of coupled Green's function equations. Good overall agreement between theory and experiment is obtained. © 2013 The Korean Physical Society.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31729f76c61832cc5cfbc3595c2cf6af https://doi.org/10.3938/jkps.63.817 Zobrazit plný text záznamu Full text from SpringerLink