Mechanism of resistive switching in HfOx-based memristors

We conducted an in-depth study of the resistance-switching mechanism in classical HfOx-based devices. Through atomic-level characterisation of the dynamic evolution of conductive filaments, we confirmed that the filament system in this type of device has a quasi-core-shell structure, consisting of a metallic Hf6O core and an insulating HfO2 crystalline shell. constitute. The study pinpointed multiple […]

When Bloch point hops through magnetic multilayers

In this Letter, we theoretically demonstrate the annihilation of single skyrmions in a multilayer structure. The process is mediated by topological hedgehog singularities known as Bloch points, whose intralayer and interlayer dynamics gives rise to intriguing emergent electromagnetic fields …

An design of skyrmion-based interconnect device

The topological properties of skyrmionic quasiparticles such as magnetic skyrmions and skyrmioniums enable their applications in future low-power, ultradense nanocomputing and neuromorphic systems. We propose here an all-magnetic skyrmionic interconnect, which has so far been the “missing component.” This interconnect will …

Our paper entitled ‘Magnetization dynamics in synthetic ferromagnetic thin films’ is published!

(Abstract) Synthetic ferromagnets (SFMs) possess the same layer structure found in the widely studied synthetic antiferromagnets. This consists of two ferromagnetic (FM) layers separated by a non-magnetic (NM) spacer forming the structure FM1/NM/FM2, but SFMs describe the case where the interlayer exchange coupling promotes the parallel alignment of the magnetizations of the FM layers. The […]

Surface roughness helps to stabilise out-of-plane spin textures in an uniformly in-plane magnetised system

We developed a surface roughness model for magnetic systems, by taking into account the space-dependent uniaxial anisotropy and Dzyaloshinskii-Moriya interaction (DMI) …

Our design selected as the logo of Magnetism 2021

The image is captured during the field-induced magnetic transition of a skyrmion lattice in theory. The colour code indicates the component of magnetisation perpendicular to the film surface. Increasing of the magnetic field forces skyrmion diameter to expand. Then the lattice inversion occurs involving the breaking of domain alls accompained with the emergence of transient […]

Congratulations on our new paper! ‘Tunable terahertz oscillation arising from Bloch-point dynamics in chiral magnets’

It reveals that the formation/annihilation of skyrmions will give rise to an emergent electric field with the frequency in the THz regime. The electric signal is due to the ultra-fast Bloch-point propagation, and both the amplitude and frequency can be tuned by the manipulation of Bloch-point dynamics. Our studies provide a concept of directly exploiting topological singularities which may be relevant for THz skyrmion-based electronic devices …

Our novel skyrmion-based synapses have launched 🚀

We propose a nanoscale synapse based on magnetic skyrmions. We show that when such synapses in a deep spiking neural network (SNN) with supervised learning achieve ∼98.61% classification accuracy in the MNIST …

„Skyrmions in Magnetic Materials“ seminar @Bad Honnef, Germany

I was really excited to attend the British-German WE-Heraeus-Seminar held in Physikzentrum Bad Honnef, Germany (1st – 5th Dec., 2019) …

THz-oscillating electric signal from Bloch point dynamics

In this work, our considerations go beyond static skyrmions, and we theoretically show that the formation/annihilation of both skyrmions and antiskyrmions is enabled by the transient creation and propagation of topological singularities (magnetic monopole-like Bloch points) …

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