Nonlinear interactions of spin waves with parametric pumping in permalloy metal films

Autor:	Yu. V. Koblyanskiy, Andrei Slavin, A. V. Talalaevskij, G. A. Melkov, R. A. Slipets
Rok vydání:	2009
Předmět:	Permalloy Dipole Materials science Spin polarization Condensed matter physics Scattering Spin wave Relaxation (NMR) Condensed Matter::Strongly Correlated Electrons Condensed Matter Physics Excitation Electronic Optical and Magnetic Materials Magnetic field
Zdroj:	Physical Review B. 79
ISSN:	1550-235X 1098-0121
DOI:	10.1103/physrevb.79.134411
Popis:	Nonlinear interactions of dipolar and dipole-exchange spin waves with microwave magnetic field of parametric electromagnetic pumping were studied experimentally in thin permalloy (Py) films. It was demonstrated that parametric pumping in Py films leads to efficient amplification of the ``trace'' of quasistanding spin waves created due to the two-magnon scattering by the input signal pulse of long-wavelength dipolar spin waves and, then, to suppression of the amplified signal due to the parametric excitation of short-wavelength exchange-dominated spin waves. It was, also, shown that nonlinear interactions of spin waves in Py films can be used for the development of microwave signal processing devices and for the measurement of relaxation characteristics of different spin-wave groups.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2cabb5d67e6ee35f355bbb97ba228c18 https://doi.org/10.1103/physrevb.79.134411 Zobrazit plný text záznamu