Spin-Wave Relaxation by Eddy Currents in Y3Fe5O12/Pt Bilayers and a Way to Suppress It

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Bunyaev, SA (Author) FCUP; Serha, RO (Author) Other; Musiienko Shmarova, HY (Author) Other; Kreil, AJE (Author) Other; Frey, P (Author) Other; Bozhko, DA (Author) Other; Vasyuchka, VI (Author) Other; Verba, RV (Author) Other; Kostylev, M (Author) Other; Hillebrands, B (Author) Other; G.N. Kakazei (Author) FCUP; Serga, AA (Author) Other

Journal

Title: Physical Review Applied

Vol. 14

ISSN: 2331-7019

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 12 Citations

Other information

Authenticus ID: P-00S-QF3

DOI: 10.1103/physrevapplied.14.024094

Abstract (EN): Because of their record-low intrinsic magnetic damping properties, single-crystal yttrium-iron-garnet (YIG) films serve as an excellent model medium for studying magnon-induced spintronic phenomena such as spin pumping and the spin-orbit torque effect. For this purpose, YIG films are covered with sub-skin-depth layers of nonmagnetic heavy metals with strong spin-orbit coupling. In the present work, we show experimentally and theoretically that ohmic losses of spin-wave-induced microwave eddy currents in the heavy-metal layer deliver a strong contribution to spin-wave damping in these hybrid structures. We demonstrate that this adverse effect can be controlled and largely eliminated by placing a highly conducting metal plate near to the surface of the YIG/Pt structures. These findings are of value for a proper interpretation of experiments on the magnon spintronic effects and for the design of future magnon spintronic devices.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7