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MA: Fachverband Magnetismus

MA 46: Spin: Transport, Orbitronics and Hall Effects I

MA 46.1: Vortrag

Donnerstag, 19. März 2020, 09:30–09:45, HSZ 403

Long-range phonon spin transport in ferromagnet - nonmagnetic insulator heterostructures — •Andreas Rückriegel¹ and Rembert A. Duine^{1, 2} — ¹Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University, Utrecht, The Netherlands — ²Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands

We investigate phonon spin transport in an insulating ferromagnet - nonmagnet - ferromagnet heterostructure. We show that the magnetoelastic interaction between the spins and the phonons leads to non-local spin transfer between the magnets. This transfer is mediated by a local phonon spin current and accompanied by a phonon spin accumulation. The spin conductance depends nontrivially on the system size, and decays over centimeter lengthscales for realistic material parameters, far exceeding the decay lengths of magnonic spin currents.