Spin-wave eigenmodes in direct-write 3D nanovolcanoes

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Dobrovolskiy, OV (Author) Other; Vovk, NR (Author) Other; Bondarenko, AV (Author) Other; Bunyaev, SA (Author) FCUP; Lamb Camarena, S (Author) Other; Zenbaa, N (Author) Other; Sachser, R (Author) Other; Barth, S (Author) Other; Guslienko, KY (Author) Other; Chumak, AV (Author) Other; Huth, M (Author) Other; G.N. Kakazei (Author) FCUP

Journal

Title: Applied Physics Letters

Vol. 118

ISSN: 0003-6951

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 22 Citations

Scopus - 23 Citations

Other information

Authenticus ID: P-00T-RDS

DOI: 10.1063/5.0044325

Abstract (EN): Extending nanostructures into the third dimension has become a major research avenue in modern magnetism, superconductivity, and spintronics, because of geometry-, curvature-, and topology-induced phenomena. Here, we introduce Co-Fe nanovolcanoes-nanodisks overlaid by nanorings-as purpose-engineered 3D architectures for nanomagnonics, fabricated by focused electron beam-induced deposition. We use both perpendicular spin-wave resonance measurements and micromagnetic simulations to demonstrate that the rings encircling the volcano craters harbor the highest-frequency eigenmodes, while the lower-frequency eigenmodes are concentrated within the volcano crater, due to the non-uniformity of the internal magnetic field. By varying the crater diameter, we demonstrate the deliberate tuning of higher-frequency eigenmodes without affecting the lowest-frequency mode. Thereby, the extension of 2D nanodisks into the third dimension allows one to engineer their lowest eigenfrequency by using 3D nanovolcanoes with 30% smaller footprints. The presented nanovolcanoes can be viewed as multi-mode microwave resonators and 3D building blocks for nanomagnonics.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6