New Reversal Mode in Exchange Coupled Antiferromagnetic/Ferromagnetic Disks: Distorted Viscous Vortex
arXiv:1504.07121 · doi:10.1039/c5nr01856k
Abstract
Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. Additionally, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vortices in exchange coupled Ir20Mn80/Fe20Ni80 microdots: distorted viscous vortex reversal. Contrary to the previously known or proposed reversal modes, the vortex is distorted close to the interface and viscously dragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymmetries in the annihilation and nucleation fields. These results provide a deeper understanding of the physics of exchange coupled vortices and may also have important implications for applications involving exchange coupled nanostructures.
arXiv comment27 pages, 4 figures and a supplemental information section
References in corpus (15)
- Magnetic vortex oscillator driven by dc spin-polarized current
- Electrical switching of vortex core in a magnetic disk
- Magnetic Vortex Core Reversal by Excitation of Spin Waves
- Anisotropic magnetoresistance in antiferromagnetic semiconductor Sr2IrO4 epitaxial heterostructure
- Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves
- Magnetic Fingerprints of sub-100 nm Fe Nanodots
- Anisotropy Dependence of Irreversible Switching in Fe/SmCo and FeNi/FePt Exchange Spring Magnet Films
- Control of the chirality and polarity of magnetic vortices in triangular nanodots
- Exchange Bias driven by Dzyaloshinskii-Moriya interactions
- Asymmetric Reversal in Inhomogeneous Magnetic Heterostructures
- Chirality control via double vortices in asymmetric Co dots
- Memory Effect and Triplet Pairing Generation in the Superconducting Exchange Biased Co/CoOx/Cu41Ni59/Nb/Cu41Ni59 Layered Heterostructure
- Probing the A1 to L10 Transformation in FeCuPt Using the First Order Reversal Curve Method
- Reversal behavior of exchange-biased submicron dots
- Deconvoluting Reversal Modes in Exchange Biased Nanodots