Chirality control via double vortices in asymmetric Co dots
arXiv:1008.4963 · doi:10.1103/PhysRevB.83.060415
Abstract
Reproducible control of the magnetic vortex state in nanomagnets is of critical importance. We report on chirality control by manipulating the size and/or thickness of asymmetric Co dots. Below a critical diameter and/or thickness, chirality control is achieved by the nucleation of single vortex. Interestingly, above these critical dimensions chirality control is realized by the nucleation and subsequent coalescence of two vortices, resulting in a single vortex with the opposite chirality as found in smaller dots. Micromagnetic simulations and magnetic force microscopy highlight the role of edge-bound halfvortices in facilitating the coalescence process.
15 pages, 4 figures
References in corpus (12)
- Magnetic vortex oscillator driven by dc spin-polarized current
- Electrical switching of vortex core in a magnetic disk
- Fractional vortices and composite domain walls in flat nanomagnets
- Soliton pair dynamics in patterned ferromagnetic ellipses
- Magnetic Fingerprints of sub-100 nm Fe Nanodots
- Universal criterion and phase diagram for switching a magnetic vortex core in soft magnetic nanodots
- Control of the chirality and polarity of magnetic vortices in triangular nanodots
- Machine-learning assistant DFT study of half-metallic full-Heusler alloy N2CaNa: structural, electronic, mechanical, and thermodynamics properties
- Vortex polarity switching by a spin--polarized current
- Angular Dependence of Vortex Annihilation Fields in Asymmetric Co Dots
- Dimensionality cross-over in magnetism: from domain walls (2D) to vortices (1D)
- Halfvortices in flat nanomagnets
Cited by in corpus (9)
- Skyrmions in Magnetic Multilayers
- Realization of Ordered Magnetic Skyrmions in Thin Films at Ambient Conditions
- Ultrastrong magnon-magnon coupling and chiral spin-texture control in a dipolar 3D multilayered artificial spin-vortex ice
- Controlled nucleation of topological defects in the stripe domain patterns of Lateral multilayers with Perpendicular Magnetic Anisotropy: competition between magnetostatic, exchange and misfit interactions
- New Reversal Mode in Exchange Coupled Antiferromagnetic/Ferromagnetic Disks: Distorted Viscous Vortex
- Magnonic bending, phase shifting and interferometry in a 2D reconfigurable nanodisk crystal
- Magnetic vortex nucleation/annihilation in artificial-ferrimagnet microdisks
- Chirality-mediated bistability and strong frequency downshifting of the gyrotropic resonance of a dynamically de-stiffened magnetic vortex
- Element-Specific First Order Reversal Curves Measured by Magnetic Transmission X-ray Microscopy