Dion, T;
Arroo, DM;
Yamanoi, K;
Kimura, T;
Gartside, JC;
Cohen, LF;
Kurebayashi, H;
(2019)
Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification.
Physical Review B
, 100
(5)
, Article 054433. 10.1103/PhysRevB.100.054433.
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Abstract
Ferromagnetic resonance (FMR) is performed on kagome artificial spin ice (ASI) formed of disconnected Ni 80 Fe 20 nanowires. Here we break the threefold angular symmetry of the kagome lattice by altering the coercive field of each sublattice via shape anisotropy modification. This allows for distinct high-frequency responses when a magnetic field is aligned along each sublattice and additionally enables simultaneous spin-wave resonances to be excited in all nanowire sublattices, unachievable in conventional kagome ASI. The different coercive field of each sublattice allows selective magnetic switching via global field, unlocking novel microstates inaccessible in homogeneous-nanowire ASI. The distinct spin-wave spectra of these states are detected experimentally via FMR and linked to underlying microstates using micromagnetic simulation.
| Type: | Article |
|---|---|
| Title: | Tunable magnetization dynamics in artificial spin ice via shape anisotropy modification |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.100.054433 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.100.054433 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Magnetism, Spintronics, Kagome lattice, Magnonic crystals, Nanostructures, Ferromagnetic resonance, Landau-Lifschitz-Gilbert equation, Magnetic force microscopy, Micromagnetic modeling, Microwave techniques |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10081519 |
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