Year: 2020
Type: article
Abstract: From a ferromagnetic resonance experiment on a YIG|GGG|YIG crystal, phonons are shown to be able to provide coherent long-range coupling between two magnets, which act as ``microphones'' and ``speakers'' for acoustic waves to induce feedback interference over millimeter distances. In this ``phononic spin valve'' under perpendicular magnetization, the phonons, which are circularly polarized, carry efficiently angular momentum current through a nonmagnetic dielectric. The high acoustic quality of phonon transport in garnets and the strong coupling to the magnetic order may also be useful for quantum communication.
Institutions: Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Institut de Recherche Interdisciplinaire de Grenoble, Spintronique et Technologie des Composants, Université Grenoble Alpes, Kazan Federal University, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay, Université Paris-Sud, Laboratoire de physique des Solides, Université de Bretagne Occidentale, Synchrotron SOLEIL, Laboratoire des Sciences et Techniques de l’Information de la Communication et de la Connaissance, Université de Bretagne Occidentale, Dassault Aviation (France), Johannes Kepler University of Linz, Tohoku University, Institute for Materials Research, Tohoku University, Oakland University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3007586639