# Spin wave propagation in ferrimagnetic $Gd_{x}Co_{1-x}$

## TL;DR

This paper investigates spin wave propagation in Gd-Co ferrimagnetic films, revealing how composition affects group velocity and attenuation, with implications for high-speed spintronic devices.

## Contribution

It provides experimental analysis of spin wave properties in Gd-Co ferrimagnets across different compositions, expanding understanding of ferrimagnetic spin dynamics.

## Key findings

- Group velocity and attenuation length vary with composition.
- Ferromagnet-based theory explains spin wave behavior away from compensation point.
- Results support potential for ferrimagnets in spintronic applications.

## Abstract

Recent advances in antiferromagnetic spin dynamics using rare-earth (RE) and transition-metal (TM) ferrimagnets have attracted much interest for spintronic devices with a high speed and density. In this study, the spin wave properties in the magnetostatic backward volume mode and surface mode in RE-TM ferrimagnetic $Gd_{x}Co_{1-x}$ films with various composition x are investigated using spin wave spectroscopy. The obtained group velocity and attenuation length are well explained by the ferromagnet-based spin wave theory when the composition of $Gd_{x}Co_{1-x}$ is far from the compensation point.

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Source: https://tomesphere.com/paper/1905.12771