Spin Wave Scattering in Ferromagnetic Cross

TL;DR

This paper investigates how magnetic fields influence spin wave scattering in a ferromagnetic cross, revealing potential for spin wave switching applications through experimental measurements and micromagnetic simulations.

Contribution

It provides new insights into the magnetic field dependence of spin wave scattering in ferromagnetic structures and explores their use as spin wave switches.

Findings

Spin wave scattering depends on bias magnetic field amplitude and angle.

Low in-plane magnetic fields rotate magnetization at the cross center.

Magnetic fields can control spin wave scattering for switching applications.

Abstract

Spin wave scattering in the right angle ferromagnetic cross was measured. Shape anisotropy defined magnetization ground states at zero biasing magnetic fields. Scattering of the spin waves in the center of ferromagnetic cross is strongly dependent on the amplitude and angle of the biasing magnetic field. Micromagnetic simulations indicate that low in-plane biasing magnetic fields rotate the magnetization of the cross center while the arms stay axially magnetized due to the shape anisotropy. We discuss effect of biasing magnetic fields on the spin wave scattering and approaches to an effective spin wave switch based on the fabricated structure.