Search

The authors realize s helicity switching of hybrid skyrmions in [Pt/Co]₃/Ru/[Co/Pt]₃ multilayers using spin-orbit torque and thermal effects, enabling motion reversal. This method advances skyrmion-based spintronic devices for data storage and quantum computing.

Magnetic droplets occur in nanocontact spin-torque oscillators with perpendicular anisotropy, forming part of a family of particle-like magnetic objects, which may be excited for high-frequency applications. Here, the authors determine a current–field phase diagram for magnetic droplet nucleation.

Spin torque nano-oscillatiors promise novel microwave applications but the functioning relies on the spin current from additional ferromagnetic or metal layers. The authors here achieved in a single ferromagnetic layer sandwiched by nonmagnetic insulators the spin wave auto-oscillations due to a localized edge mode of the nano-constriction.

Spin–torque oscillators have potential as nanosized microwave signal generators, but presently they are limited by their small output power. Here, the authors develop a cheap lithographic method to fabricate spin–torque oscillators, which can be mutually synchronized to overcome the output-power limitation.

Nano-contact-based spin wave generation may enable high-frequency magnonic devices but has been limited to long wavelengths and weak signal strengths. Here the authors demonstrate high-order short-wavelength propagating spin waves with increased transmission rates and propagation lengths in magnetic tunnel junction stacks.

A number of different platforms for spin-based computing have emerged over the past few years, offering energy-efficient computing methods. This Technical Review identifies key metrics that must be evaluated to benchmark their performance.

Phase tuning of propagating spin waves is a crucial step in the development of devices based on magnons, which are the quanta of spin waves. Now, this has been demonstrated in a device comprising two spin Hall nano-oscillators.

Skyrmionium, like the more well-known magnetic skyrmion, is a topological spin texture. It is characterized by ring shaped magnetic texture, where both inside and outside the magnetization is the same, yielding a topological charge of zero. Here, Yang et al demonstrate reversible control of skyrmioniums, switching between skyrmions and skyrmionium using electric currents.

One promising approach for the manipulation of the magnetic state of materials is to use surface plasmons, however, observing the direct influence of surface plasmons on spins is challenging. Here, Fan et al use Lorentz ultrafast transmission electron microscopy to illuminate the interplay between surface plasmons and spins.

This allows versatile non-volatile tuning of the mutual synchronization of chains of up to four oscillators and provides a path toward individual oscillator control in large oscillatory arrays.

Magnetic droplets are a type of non-topological magnetic soliton, which are stabilised and sustained by spin-transfer torques for instance. Without this, they would collapse. Here Ahlberg et al show that by decreasing the applied magnetic field, droplets can be frozen, forming a static nanobubble

Synchronization of oscillators can be used to carry out cognitive tasks. Large two-dimensional arrays of synchronized spin Hall nano-oscillators have now been demonstrated, and may in future enable neuromorphic computing on the nanoscale.

Spin Hall nano-oscillators can be tuned via magnetic fields and the drive current, but individual oscillator control in large arrays remains a challenge. Here, the authors provide individual control of the threshold current and the auto-oscillation frequency by voltage-controlled magnetic anisotropy.

Topological semimetals offer the potential for new-generation spintronic devices. Here, the authors demonstrate a large out-of-plane damping-like spin–orbit torque efficiency in a heterostructure based on the Weyl semimetal TaIrTe₄.

Autoimmune Addison’s disease is a rare complex disease, which has not yet been characterized by non-biased genetic studies. Here, the authors perform the first GWAS for the disease, identifying nine loci including two coding variants in the gene Autoimmune Regulator (AIRE).

Millimetre-scale meron lattices that are stable at room temperature and under zero magnetic field can be used as spin injectors in light-emitting diodes, providing 22.5% circularly polarized electroluminescence.

Ferromagnetic nanoantennas support plasmons and exhibit magneto-optical activity under external magnetic fields. Maccaferri et al. show how designed phase compensation in the electric response of these nanostructures enables them to act as ultrasensitive label-free molecular sensors with high figures of merit.

Spin waves generated by a spin-torque nano-oscillator can be propagated in a magnonic nanowaveguide fabricated next to the oscillator.

A spin torque nano-oscillator consists of a free magnetic layer and a reference magnetic layer. Many works have examined the behaviour of droplet solitons in the free magnetic layer. Here, Jiang et al. extend this to pair of droplet solitons, with one in the free layer and one in the reference layer.

Magnetic skyrmions are particle-like spin textures with non-trivial topology which are stabilized by local magnetic interactions. Here, the authors demonstrate theoretically a class of skyrmions which are stabilized dynamically in the absence of interactions in a nanocontact spin-torque oscillator.

The synchronization of nine nanoconstriction spin Hall nano-oscillators brings spin-based oscillators closer to the power and noise requirements needed for practical applications.

Combining advanced mitigation technologies with behavioural changes could achieve the lowest carbon emissions per capita in Sweden, suggest scenario analyses combining bottom-up simulations for passenger travel, construction and housing, and food, and top-down analyses for remaining consumption.

Combinatorial optimization problems are challenging to solve due to their NP-hardness and the limitations of classical computing. This study introduces a surface acoustic wave-based Ising machine demonstrating similar scalability, improved thermal stability, and reduced power consumption compared to coherent Ising machines, offering a promising solution for large-scale optimization tasks.

The authors propose and experimentally demonstrate a magnonic version of a coherent Ising machine that implements a thin film Yttrium Iron Garnet spin-wave delay-line combined with microwave components. The work emphasizes the relative advantages that a slower more compact spin-wave system has over optical machines using similar principles.