Nonlinear Dynamics in Spin Vortex Pairs With Strong Core–Core Coupling

Autor:	Boris A. Ivanov, Vladislav Korenivski, B. C. Koop
Rok vydání:	2014
Předmět:	Physics Dipole Nonlinear system Amplitude Condensed matter physics Microwave spectra Resonance Electrical and Electronic Engineering Antiparallel (electronics) Excitation Electronic Optical and Magnetic Materials Vortex
Zdroj:	IEEE Transactions on Magnetics. 50:1-4
ISSN:	1941-0069 0018-9464
DOI:	10.1109/tmag.2014.2327157
Popis:	We investigate the dynamics of spin vortex pairs in magnetic multilayer particles, with the vortices closely spaced vertically and therefore with strong core-core coupling. We focus on the spin-dynamic behavior of the system beyond the linear small-signal regime, and on the state with antiparallel vortex chiralities and parallel cores, in which the vortex cores are strongly dipole coupled. The data show a clear transition from the dominant single rotational resonance at 2-3 GHz for small excitation field amplitudes to a dominant gyrational resonance at high excitation fields. The concomitant changes in the microwave spectra, seen as satellite resonances near the rotational peak as well as a pronounced low-frequency resonance, are interpreted as arising from the nonlinearities of the main rotational mode, which also mediate microwave power transfer from the high- to the low-frequency mode.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f4f39533a5fbbe0133e3bcbe9b2a47a https://doi.org/10.1109/tmag.2014.2327157 Zobrazit plný text záznamu