Gradient-Induced Dzyaloshinskii–Moriya Interaction (April 17th, 2023)
The Dzyaloshinskii–Moriya interaction (DMI) arising in the magnetic systems with broken inversion symmetry plays an essential role in topological spintronics. Using atomistic spin model simulations of an intriguing type of DMI emerging in the films with composition gradient (g-DMI), it is demonstrated that that both the strength and chirality of g-DMI can be controlled by […]
Read moreMicromagnetics of chemical modulations in cylindrical nanowires (February 09th, 2023)
We combined chemical synthesis, magnetic microscopy and micromagnetic simulations to provide a comprehensive view of the micromagnetics of chemical modulations in cylindrical nanowires. This sets the ground for their use to investigate the specific aspects of domain-wall dynamics and spin waves in a curvilinear system. Curvilinear and three-dimensional magnetism are a fast-developing field, considering […]
Read moreVibrating magnetic microparticles to stimulate insulin secretion (February 09th, 2023)
In the context of intensive research on treatments against diabetes – major health threat to millions of people, we report here on an innovative approach based on mechanobiology. Basically, chronic hyperglycemia is regulated by a supply of insulin, if insufficiently secreted. We show here that the mechanical stimulation of pancreatic beta cells, via the […]
Read moreWaking-up wireless sensor nodes with perpendicular magnetic tunnel junctions (December 19th, 2022)
Spin-torque-nanodiodes based on magnetic tunnel junctions are promising candidates for RF energy harvesters and ultra-low power wake-up receivers with performances that are expected to surpass those of semiconductor diodes. Experiments on magnetic tunnel junctions with perpendicular magnetic anisotropy show how the performances can be optimized upon reducing the magnetic layer thickness and the device […]
Read moreSpintronic Memristor based Binarized Ensemble Convolutional Neural Network (December 15th, 2022)
We have investigated the use of spintronic devices to enable the implementation of a Binary Ensemble Convolutional Neural Network. A simulation flow has been setup and allowed to evaluate this disruptive combination and very promising results have been obtained in terms of hardware optimization and power reduction. The use of emerging technologies has been […]
Read moreSpin-transport in antiferromagnets from the GHz to THz regime (December 12th, 2022)
Control over spin transport in antiferromagnetic systems is essential for future spintronic applications with operational speeds extending to ultrafast time scales. A consortium of physicists at SPINTEC, JGU Berlin and Charles University Prague established the essential role of interfaces for spin current injection and spin current-to-charge current conversion, from the gigahertz (GHz) diffusive to […]
Read moreComputing and storing data at the nanoscale using magnetic skyrmions (December 08th, 2022)
Magnetic skyrmions are appealing for use in logic and memory devices combining small size and fast motion. Here, we propose to exploit skyrmion interactions to perform both logic and memory operations at the nanoscale. Our concept opens a path for novel devices which intrinsically merge high-density non-volatile data storage with computing capabilities. a. Schematic representation […]
Read moreBilinear magnetoresistance in HgTe topological insulator (December 05th, 2022)
Y. Fu, J. Li, J. Papin, P. Noël, S. Teresi, M. Cosset-Chéneau, C. Grezes, T. Guillet, C. Thomas, Y.-M. Niquet, P. Ballet, T. Meunier, J.-P. Attané, A. Fert, and L. Vila, Nano Lett. 22, 7867 (2022). We report the observation of this bilinear magnetoresistance (BMR) in strained HgTe, a prototypical TI. We show that […]
Read moreControlling skyrmion chirality with a gate voltage (December 01st, 2022)
Magnetic skyrmions are localized chiral spin textures, which offer great promise to store and process information at the nanoscale. The unique sense of rotation of their surrounding domain wall, called chirality, is resulting from the so-called Dzyaloshinskii−Moriya Interaction. C.E. Fillion et al. have managed the inversion of the skyrmion chirality by applying a gate voltage, […]
Read moreObservation of skyrmions in synthetic antiferromagnetic and their nucleation using current and light (November 28th, 2022)
Skyrmions in synthetic antiferromagnets are appealing for use in future memory and computing devices, combining small size and fast motion, but creating, stabilizing, and observing them remains a challenge. Here, we demonstrate the stabilization and current and light induced nucleation of skyrmions in a synthetic antiferromagnet, observing the magnetization texture in each layer using X-ray […]
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