Localized magnetic excitations of coupled impurities in a transverse Ising ferromagnet

A Green's function formalism is used to calculate the spectrum of excitations of two neighboring impurities implanted in a semi-infinite ferromagnetic. The equations of motion for the Green's functions are determined in the framework of the Ising model in a transverse field and results are...

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Veröffentlicht in:	Journal of magnetism and magnetic materials 2005-08, Vol.295 (1), p.57-64
Hauptverfasser:	Leite, R.V., Milton Pereira, J., Costa Filho, R.N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology General theory and models of magnetic ordering Green's function Heisenberg ferromagnet Impurities modes Ising model transverse Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Physics Spin wave Spin waves
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Beschreibung
Zusammenfassung:	A Green's function formalism is used to calculate the spectrum of excitations of two neighboring impurities implanted in a semi-infinite ferromagnetic. The equations of motion for the Green's functions are determined in the framework of the Ising model in a transverse field and results are given for the effect of the exchange coupling, position and orientation of the impurities on the spectra of localized spin wave modes.
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2004.12.039