All electrical propagating spin wave spectroscopy with broadband wavevector capability

TL;DR

This paper introduces an all-electrical broadband spectroscopy method for propagating spin waves in magnetic stripes, enabling detailed wavevector-dependent analysis with high precision and phase resolution.

Contribution

It presents a novel experimental setup using nanoscale antennas for broadband, phase-resolved spin wave spectroscopy with wavevector selectivity in magnetic materials.

Findings

Achieved wavevector selection via excitation frequency control.

Demonstrated phase-resolved detection of propagating spin waves.

Enabled study of dispersion spectra and non-reciprocal propagation.

Abstract

We develop an all electrical experiment to perform the broadband phase-resolved spectroscopy of propagating spin waves in micrometer sized thin magnetic stripes. The magnetostatic surface spin waves are excited and detected by scaled down to 125 nm wide inductive antennas, which award ultra broadband wavevector capability. The wavevector selection can be done by applying an excitation frequency above the ferromagnetic resonance. Wavevector demultiplexing is done at the spin wave detector thanks to the rotation of the spin wave phase upon propagation. A simple model accounts for the main features of the apparatus transfer functions. Our approach opens an avenue for the all electrical study of wavevector-dependent spin wave properties including dispersion spectra or non-reciprocal propagation.