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1 PublicationPiezostrain as a Local Handle to Control Gyrotropic Dynamics of Magnetic Vortices
Iurchuk, V.; Sorokin, S.; Lindner, J.; Faßbender, J.; Kakay, A.
Abstract
We present a study of the piezostrain-tunable gyrotropic dynamics in Co40Fe40B20 vortex microstructures fabricated on a 0.7Pb[Mg1/3Nb2/3]O3-0.3PbTiO3 single-crystal substrate. Using field-modulated-spin-rectification measurements, we demonstrate large frequency tunability (up to 45%) in individual microdisks accessed locally with low surface voltages, and magnetoresistive readout. With increased voltage applied to the substrate, we observe a gradual decrease of the vortex-core gyrotropic frequency associated with the contribution of the strain-induced magnetoelastic energy. The frequency tunability strongly depends on the disk size, with increased frequency downshift for disks with larger diameter. Micromagnetic simulations suggest that the observed size effects originate from the joint action of the strain-induced magnetoelastic and demagnetizing energies in large magnetic disks. These results enable a selective energy-efficient tuning of the vortex gyrotropic frequency in individual vortex-based oscillators with all-electrical operation.
Keywords: Magnetic vortices; Magnetoelastic effect; Magnetoresistance; Spin dynamics
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Physical Review Applied 20(2023), 024080
DOI: 10.1103/PhysRevApplied.20.024080
arXiv: 2305.10056v1
Downloads
- Open Access Version from arxiv.org
- Secondary publication expected from 31.08.2024
Permalink: https://www.hzdr.de/publications/Publ-37975