Thermal properties of surface and bulk spin waves in metamagnets FeBr2 and FeCl2

Autor:	E. Meloche, M. G. Cottam
Rok vydání:	2003
Předmět:	Coupling Spins Condensed matter physics Chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Ferromagnetism Spin wave Dispersion relation Thermal Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Metamagnetism
Zdroj:	physica status solidi (a). 196:165-168
ISSN:	1521-396X 0031-8965
DOI:	10.1002/pssa.200306377
Popis:	Surface and bulk spin wave properties are studied in metamagnets, which consist of ferromagnetically ordered layers with the intralayer ferromagnetic exchange coupling being much stronger than the interlayer antiferromagnetic exchange. Using a Green's function method, dispersion relations are calculated for the S = 1 metamagnets FeBr 2 and FeCl 2 over a broad range of temperatures by considering layer dependent thermal averages for the spins. Results are also deduced for the temperature dependence of the integrated intensities of acoustic and optical spin waves close to the surface.
Databáze:	OpenAIRE
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