Frequency-dependent reflection of spin waves from a magnetic inhomogeneity induced by a surface DC-current

TL;DR

This study investigates how a surface DC-current-induced magnetic inhomogeneity affects the frequency-dependent reflection of spin waves on a ferrite film, revealing significant frequency dependence when the current increases the magnetic field locally.

Contribution

It provides experimental insights into the frequency-dependent reflection behavior of spin waves caused by localized magnetic inhomogeneities induced by surface DC currents.

Findings

Reflection is strongly frequency-dependent when the current increases the magnetic field.

Frequency dependence is negligible when the current decreases the magnetic field.

Experimental evidence of magnetic inhomogeneity effects on spin-wave reflection.

Abstract

The reflectivity of a highly localized magnetic inhomogeneity is experimentally studied. The inhomogeneity is created by a dc-current carrying wire placed on the surface of a ferrite film. The reflection of propagating dipole-dominated spin-wave pulses is found to be strongly dependent on the spin-wave frequency if the current locally increases the magnetic field. In the opposite case the frequency dependence is negligible.