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Lattices of magnetic whirls are a promising model system to study phases and phase transitions in two dimensions.

Faraday microscopy and magnetic force microscopy with circularly polarized picosecond optical pulses are used to investigate domain switching in a ferromagnetic Pt/Co/Pt thin film. A stochastic model explains the nucleation and growth of magnetic domains, taking into account light helicity and the relative magnetization of neighbouring domains.

Ferrimagnets possess multiple spin sub-lattices resulting in a complex magnon band structure and subtle spin transport across interfaces. Here, the authors show how the spin Seebeck effect, the thermal generation of pure spin current, may be an effective tool to study these magnetic excitations.

Terahertz radiation is used to directly probe magnetotransport in metallic multilayers on the timescale of electron momentum scattering—the fundamental conditions of Nevill Mott’s model of spin-dependent conduction in metals.

In three dimensions, it is possible to have more complicated spin textures, one such example is a hybrid chiral skyrmion tube, where each end of the tube has skyrmions of opposite chirality. Here, Dohi, Bhukta, Kammerbauer and coauthors find that these skyrmion tubes exhibit a non-reciprocal skyrmion Hall effect.

This study applies magnetic fields in selected in-plane directions to disentangle the mechanisms underlying the anomalous Hall effect in a representative noncollinear antiferromagnet.

Dynamic Kerr microscopy enables the tracking of the two-step melting of a magnetic skyrmion lattice from a two-dimensional solid through an intermediate hexatic regime to an isotropic liquid and provides direct insights in the occurrence and dynamics of lattice dislocations, the defects that mediate melting.

Skyrmions are topological spin textures, which have been proposed as useful for a diverse array of applications. One such proposal is to make use of a skyrmion’s thermally activated Brownian-like diffusive motion for unconventional computing and true random number generation. Here, Dohi et al show how, in a synthetic antiferromagnet, this diffusive motion can be significantly enhanced.

Spintronics has made great progress with switching and control of magnetization with charge currents, however, the fundamental issue of joule heating remains. Here, Choi, Ha, and coauthors demonstrate magnetization switching driven by magnonic spin dissipation in an antiferromagnet/ferromagnet bilayer structure.

Experiments show that when driven by electric currents, magnetic skyrmions experience transverse motion due to their topological charge — similar to the conventional Hall effect experienced by charged particles in a perpendicular magnetic field.

The authors find the magnon spin transport in CrSP₄/Pt (Ta) can be effectively modulated through adjustments in temperature and applied magnetic field, particularly at the spin-flip field.

There has been a recent surge in interest in using the orbital Hall effect to improve switching performance and expand the material options for spin-orbit torque driven magnetic memory. Here, Gupta et al demonstrate a significant improvement switching efficiency through integration of Ru in place of the more standard heavy metal, Pt.

Magnetic skyrmionic bubbles have been reported for Fe₅GeTe₂ and other layered van der Waals materials and are good candidates for applications in spintronics. Here, the authors report a near room temperature skyrmionic structure for Fe₅GeTe₂ and study the magnetic ordering for pre and post-cooling states using a combination of magnetic measurements and DFT calculations.

Physical reservoir computing allows real-time low power information processing. Here, the authors report reservoir computing with magnetic skyrmions able to detect millisecond time-scale hand gestures, matching software neural networks’ performance.

Orbitronics uses the electron’s orbital angular momentum to enable next-generation memory and computing technologies. This Perspective outlines recent advances, key challenges and future directions in this rapidly evolving field.

The fundamental hallmark of altermagnetism lies in the spin splitting of electronic valence bands. Here, the authors observe splitting in metallic CrSb, revealing an exceptionally large value and energetic placement just below the Fermi energy.

Topological antiferromagnetic spin textures, including merons, antimerons, and bimerons, are demonstrated in synthetic antiferromagnets by three-dimensional vector imaging of the Néel order parameter and investigated by micromagnetic analysis.

Magnetic domain walls could form the basis for information technology with high storage density, but require comparatively high current densities to be moved by spin torque. Here, the authors demonstrate a radically different approach with perpendicular magnetic field pulses moving domain walls synchronously.

A prerequisite for using domain walls in logic or sensing devices is a thorough knowledge of the properties and precise control. Here the authors monitor the domain wall motion in curved nanowires by stroboscopic imaging and find a regime of oscillating velocity and spin structure below the Walker breakdown.

Magnetic skyrmions, due to their strongly nonlinearity and multiscale dynamics, are promising for implementing reservoir computing. Here, the authors experimentally demonstrate skyrmion-based spatially multiplexed reservoir computing able to perform Boolean Logic operations, using thermal and current driven dynamics of spin structures.

Skyrmions, topological spin textures, can be pinned by defects present in the material that hosts them, influencing their motion. Here, Gruber et al show that the skyrmions are pinned at their boundary where the finite size of the skyrmions governs their pinning, and they demonstrate that certain pinning sites can switched on and off in-situ.

Chiral spin structures have great promise for future information processing applications, however little is known about their ultrafast dynamics. In this experimental study, the authors use femtosecond temporal evolution to observe the fast recovery of chiral magnetic order.

An antisymmetric and chiral long range interlayer magnetic exchange interaction is measured, with implications for spintronics and chiral magnetic devices.

An analysis of skyrmion dynamics at different temperatures and electric drive currents is used to develop a complete description of the skyrmion Hall angle in ferromagnetic multilayers from the creep to the flow regime and illustrates that skyrmion trajectories can be engineered for device applications.

The Joule heating free magnon spintronics advances conventional electronics but demands more magnon-based logic operations. Here the authors achieved the magnon spin valve functionality in a YIG/CoO/Co structure where the amplitude of transmitted magnon from the YIG layer is dependent on the relative alignment of the YIG and Co magnetization.

Understanding the effects of local dynamic strain on magnetization may help the development of magnetic devices. Foerster et al. demonstrate stroboscopic imaging that allows the observation of both strain and magnetization dynamics in nickel when surface acoustic waves are driven in the substrate.

Magnetic skyrmions are chiral spin structures that can form two-dimensional lattices. Here, the authors show how lattice domains grow under the influence of pinning effects in a non-flat energy landscape and that magnetic field oscillations help to stabilize order.

Probing spin pumping in the terahertz regime allows one to reveal its initial elementary steps. Here, the authors show that the formation of the spin Seebeck current in YIG/Pt critically relies on hot thermalized metal electrons because they impinge on the metal-insulator interface with maximum noise.

Thermal diffusion of skyrmions in a non-flat energy landscape shows exponential temperature dependence and can be used for a reshuffler device with potential application in probabilistic computing.

Generation of stable skyrmion lattices and displacement of trains of individual skyrmions along a magnetic racetrack by short current pulses are demonstrated at room temperature in ultrathin metallic ferromagnets.

Efforts to understand skyrmion behaviour often overlook the interaction potentials but these are key to improve predictive modelling. Here, the authors use an Iterative Boltzmann Inversion technique to construct potentials for skyrmion-skyrmion and skyrmion-boundary interactions from a single experimental measurement, finding the two interactions are exponentially repulsive.

Skyrmions are topologically nontrivial spin textures which could be used as energy efficient carriers of information in future memory devices, but first reliable and efficient control of their movement is required. Here, the authors demonstrate a method to control the movement of individual skyrmions by making use of the magnetic interaction between a sample and a magnetic force microscopy probe.

By connecting light and magnetism, the cavity magnon-polariton offers a link between quantum computing and spintronics. Here, an important step towards this goal is achieved by demonstrating a dynamic control over both subsystems with coherent microwave pulses on nanosecond timescales.