Two-dimensional magnons and domain wall dynamics in yttrium iron garnet

Author

Gornakov, Vladimir S. ; Nikitenko, Valerian I. ; Synogach, Valerii T.

Author_Institution

Inst. of Solid State Phys., Russian Acad. of Sci., Moscow, Russia

Volume

29

Issue

3

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

2073

Lastpage

2076

Abstract

Interactions between different types of excitations in magnetic domain walls in YIG single crystal plates are investigated by induction and magnetooptic techniques. The behavior of translational and flexural modes of the wall vibrations as a function of wall velocity was found to be asymmetric. The flexural mode amplitudes and eigenfrequencies for positive and negative wall velocities are not equal, and the dynamic structures of the wall moving at positive and negative velocities are found to be essentially different. The character of both asymmetries was reversed by changing the wall polarity. Various nonlinearities in highly excited domain walls were studied, including the appearance of multiple discrete harmonics as well as a continuous component of the Fourier spectrum of the wall vibration signal and the corresponding changes of its mobility and dynamic structure

Keywords

garnets; harmonics; magnetic domain walls; magneto-optical effects; magnons; yttrium compounds; Fourier spectrum; YFe5O12; YIG single crystal plates; dynamic structures; eigenfrequencies; flexural mode amplitudes; magnetic domain walls; magnetooptic techniques; mobility; multiple discrete harmonics; translational mode; two dimensional magnons; wall velocity; wall vibration signal; Coils; Frequency; Garnets; Iron; Magnetic domain walls; Magnetic domains; Magnetization; Solid state circuits; Solitons; Yttrium;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.211321

Filename

211321