Abstract
In a typical experiment in magnonics, thin films are magnetized in plane and spin waves only carry angular momentum along their spatial propagation direction. Motivated by the experiments of Bozhko et al. [Phys. Rev. Research 2, 023324 (2020)10.1103/PhysRevResearch.2.023324], we show theoretically that for obliquely magnetized thin films, exchange-dipolar spin waves are accompanied by a transverse spin current. We propose an experiment to electrically detect this transverse spin current with Pt strips on top of an yttrium iron garnet film, by comparing the induced spin current for spin waves with opposite momenta. We predict the relative difference to be of the order 10-4, for magnetic fields tilted at least 30∠out of plane. This transverse spin current is the result of the long-range dipole-dipole interaction and the inversion symmetry breaking of the interface.
| Original language | English |
|---|---|
| Article number | 220407 |
| Journal | Physical Review B |
| Volume | 101 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 1 Jun 2020 |
Funding
Acknowledgments. R.A.D. acknowledges support as a member of the D-ITP consortium, a program of the Dutch Organization for Scientific Research (NWO) that is funded by the Dutch Ministry of Education, Culture and Science (OCW). This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 725509). This work is part of the research program of the Foundation for Fundamental Research on Matter (FOM), which is part of the Netherlands Organization for Scientific Research (NWO). It is a pleasure to thank Alexander Serga and Huaiyang Yang for discussions.