Transport properties of spin superfluids: Comparing easy-plane ferromagnets and antiferromagnets

Abstract

We present a study on spin-superfluid transport based on an atomistic, classical spin model. Easy-plane ferro- A s well as antiferromagnets are considered, which allows for a direct comparison of these two material classes based on the same model assumptions. We find a spin-superfluid transport which is robust against variations of the boundary conditions, thermal fluctuations, and dissipation modeled via Gilbert damping. Though the spin accumulation is smaller for antiferromagnets the range of the spin-superfluid transport turns out to be identical for ferro- A nd antiferromagnets. Finally, we calculate and explore the role of the driving frequency and especially the critical frequency, where phase slips occur and the spin accumulation breaks down.