Magnon spectrum and related finite-temperature magnetic properties: A first-principle approach

Autor:	Helmut Eschrig, A. Y. Perlov, S. V. Halilov, Peter M. Oppeneer
Rok vydání:	1997
Předmět:	Physics Condensed matter physics Condensed Matter::Other Magnon Ab initio General Physics and Astronomy Spectral line Condensed Matter::Materials Science Magnetization Spin wave Thermal Curie temperature First principle Condensed Matter::Strongly Correlated Electrons
Zdroj:	Europhysics Letters (EPL). 39:91-96
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i1997-00319-x
Popis:	It is shown that the magnon spectrum of magnetically ordered crystals can be calculated using a frozen magnon scheme and spin density functional theory in the local approximation. Ab initio calculated magnon spectra for Fe and Ni are presented. Kohn anomalies are predicted for the magnon spectrum of Fe. Considering the magnons as true low-lying thermal excitations and using mean-field semi-classical statistics at elevated temperatures, the finite-temperature magnetization and Curie temperature TC are calculated, which compare well with experiment for Fe, Co, and Ni.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b89aa8bbd4fa4e1b85f61da57d93eedf https://doi.org/10.1209/epl/i1997-00319-x Zobrazit plný text záznamu