Transmission of spin waves in ordered FeRh epitaxial thin films

TL;DR

This study investigates how the degree of B2-ordering affects the transmission of magnetostatic surface spin waves in FeRh thin films, revealing long-distance spin wave propagation even with significant spin-orbit interaction, and highlighting potential spintronic applications.

Contribution

It demonstrates the dependence of spin wave transmission on B2-ordering in FeRh and shows long-range transmission in highly ordered samples at room temperature.

Findings

Spin waves transmit over 21 μm in ordered FeRh.

Long-range transmission occurs despite large spin-orbit interaction.

FeRh's properties suggest potential in spintronic and magnonic devices.

Abstract

We report on B2-ordering dependence of magnetostatic surface spin waves in ferromagnetic FeRh at room temperature. Spin waves transmit over a distance longer than 21 {\mu}m in highly ordered FeRh alloys even with relatively large spin-orbit interaction. The long-range transmission likely arises from the induced Rh moments of the ordered FeRh due to ferromagnetic exchange interaction between Fe and Rh. The results indicate a potential of using FeRh in spintronic and magnonic applications by integrating with other fascinating magnetic characteristics of FeRh such as electric field induced magnetic phase transition.