Excitation of vortices using linear and nonlinear magnetostatic waves

Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Feb;71(2 Pt 2):026614. doi: 10.1103/PhysRevE.71.026614. Epub 2005 Feb 24.

Abstract

It is shown that stationary vortex structures can be excited in a ferrite film, in the important centimeter and millimeter wavelength ranges. It is shown that both linear and nonlinear structures can be excited using a three-beam interaction created with circular antennas. These give rise to a special phase distribution created by linear and nonlinear mixing. An interesting set of three clockwise rotating vortices joined by one counter-rotating one presents itself in the linear regime: a scenario that is only qualitatively changed by the onset of nonlinearity. It is pointed out that control of the vortex structure, through parametric coupling, based upon a microwave resonator, is possible and that there are many interesting possibilities for applications.