Projects per year
Abstract
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.
Original language | English |
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Article number | 132405 |
Number of pages | 6 |
Journal | Applied Physics Letters |
Volume | 118 |
Issue number | 13 |
DOIs | |
Publication status | Published - 29 Mar 2021 |
Austrian Fields of Science 2012
- 103017 Magnetism
Projects
- 2 Finished
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CurviMag: Curvature-induced effects in magnetic nanostructures
Dobrovolskiy, O. & Chumak, A.
1/01/21 → 31/12/23
Project: Research funding
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MagFunc: Non-Reciprocal 3D Architectures for Magnonic Functionalities
Chumak, A., Dobrovolskiy, O., Wang, Q., Süss, D., Abert, C., Voronov, A. & Zenbaa, N.
1/10/20 → 30/09/24
Project: Research funding