Long-distance magnon transport in the van der Waals antiferromagnet CrPS4

Abstract

We demonstrate the potential of van der Waals magnets for spintronic applications by reporting long-distance magnon spin transport in the electrically insulating antiferromagnet chromium thiophosphate ($\mathrm{Cr}\mathrm{P}{\mathrm{S}}_{4}$) with perpendicular magnetic anisotropy. We inject and detect magnon spins nonlocally by Pt contacts and monitor the nonlocal resistance as a function of an in-plane magnetic field up to 7 T. We observe a nonlocal resistance over distances up to at least a micron below the N\'eel temperature (${T}_{\mathrm{N}}=38$ K) close to magnetic field strengths that saturate the sublattice magnetizations.