Optical creation and annihilation of skyrmion patches in a bulk chiral magnet

Abstract

A key challenge for the realization of future skyrmion devices comprises the controlled creation, annihilation and detection of these topologically non-trivial magnetic spin textures. In this study, we report an all-optical approach for writing, deleting, and reading skyrmions in the cubic chiral magnet Fe${}_{0.25}$Co${}_{0.75}$Si based on thermal quenching. Using focused femtosecond laser pulses, patches of a skyrmion state are created and annihilated locally, demonstrating unprecedented control of thermally metastable skyrmions in a bulk compound. The skyrmion state is read-out by analyzing the microwave spin excitations in time-resolved magneto-optical Kerr effect measurements. Extracting the magnetic field and laser fluence dependence, we find well-separated magnetic field regimes and different laser fluence thresholds for the laser-induced creation and annihilation of metastable skyrmions. The all-optical skyrmion control, as established in this study for a model system, represents a promising and energy-efficient approach for the realization of skyrmions as magnetic bits in future storage devices, reminiscent of magneto-optical storage devices in the past.

References in corpus (25)

• Skyrmion Lattice in a Chiral Magnet
• Skyrmion Lattice in a Doped Semiconductor
• Magnetic skyrmion artificial synapse for neuromorphic computing
• Spin-Wave Modes and Their Intense Excitation Effects in Skyrmion Crystals
• Observation of magnetic excitations of skyrmion crystal in a helimagnetic insulator
• Thermal skyrmion diffusion applied in probabilistic computing
• Laser-Induced Magnetic Nanostructures with Tunable Topological Properties
• A magnetic skyrmion as a non-linear resistive element - a potential building block for reservoir computing
• Robust metastable skyrmions and their triangular-square lattice-structural transition in a high-temperature chiral magnet
• Topological stability versus thermal agitation in a metastable magnetic skyrmion lattice
• Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscopy
• Creation of Magnetic Skyrmion Bubble Lattices by Ultrafast Laser in Ultrathin Films
• Reservoir Computing with Random Skyrmion Textures
• Entropy-limited topological protection of skyrmions
• Propagating spin excitations along skyrmion strings
• Skyrmion based microwave detectors and harvesting
• Magnetoelectric Resonances and Predicted Microwave Diode Effect of Skyrmion Crystal in Multiferroic Chiral-Lattice Magnet
• Deterministic Generation and Guided Motion of Magnetic Skyrmions by Focused He${}^{+}$-Ion Irradiation
• History dependence of the magnetic properties of single-crystal Fe${}_{1-x}$Co${}_x$Si
• Skyrmion ratchet propagation: Utilizing the skyrmion Hall effect in AC racetrack storage devices
• Extended skyrmion lattice scattering and long-time memory in the chiral magnet Fe${}_{1-x}$Co${}_x$Si
• Observation of Coherent Helimagnons and Gilbert damping in an Itinerant Magnet
• Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3
• Tailoring Optical Excitation to Control Magnetic Skyrmion Nucleation
• Optically excited spin dynamics of thermally metastable skyrmions in Fe${}_{0.75}$Co${}_{0.25}$Si

Cited by in corpus (3)

• Anisotropy-dependent decay of room temperature metastable skyrmions and a nascent double-$q$ spin texture in Co${}_8$Zn${}_9$Mn${}_3$
• Pathways to Bubble and Skyrmion Lattice Formation in Fe/Gd Multilayers
• Skyrmionic qubits stabilized by Dzyaloshinskii-Moriya interaction as platforms for qubits and quantum gates