Scientific highlights illustrated by key publications
- Resistively-coupled stochastic MTJ for energy-based optimum search (January 22nd, 2024)
We study recurrent networks of binary stochastic Magnetic Tunnel Junctions (sMTJ), aiming at efficiently solving computationally hard optimization problems. After validating a prototyping route, we investigate the impact of hybrid CMOS+MTJ building block variants on ... - Deterministic switching in Voltage Controlled Magnetic Anisotropy Magnetic at Cryogenic Temperatures (January 22nd, 2024)
Cryoelectronics has the potential to become important in high-performance computing applications and in the context of quantum computing. For low-temperature operation, it becomes imperative to reduce power dissipation, and improved device efficiency could even offset ... - The spin diode (January 22nd, 2024)
Spin electronics applies to a wide range of materials: metals, where spin is transported by electrons, but also magnetic insulators, where spin is transported by magnons. The latter are of interest because in certain insulators, ... - Local setting of spin textures in antiferromagnets (December 11th, 2023)
The setting of spin textures in antiferromagnets (AFMs) provides a potential route to antiferromagnetic spintronic devices with non-collinear spin states such as skyrmions, bubbles and domain walls. In this work, a consortium of physicists from ... - In plane reorientation induced single laser pulse magnetization reversal (October 27th, 2023)
We demonstrate that single pulse all optical helicity independent switching can be generalized for a large range of rare earth–transition metal multilayers. The threshold fluence for switching is observed to be independent of the pulse ... - Spiking neuron based on magnetic tunnel junction with dual free layer (October 27th, 2023)
We demonstrate that a perpendicular magnetic tunnel junction (MTJ) is capable of emulating an artificial spiked neuron. The magnetic stack has been designed so that the MTJ has two free layers, whose magnetization can be ... - A high gain flux concentrator greatly amplifies the sensitivity of a magnetic field sensor (October 16th, 2023)
The large magnetometers currently used onboard satellites for space exploration cannot be installed in the tiny nanosatellites (cubesat) that are envisioned for multipoint measurements. As a first step towards the realization of a miniature space ... - SpinDrop: Dropout Based Bayesian Binary Neural Networks with STT-MRAM (October 16th, 2023)
Bayesian NN (BayNN) using Dropout-based approximation provides a systematic approach for estimating the uncertainty of predictions. Despite such merit, they are not suitable for implementation in an embedded device and in most cases cannot meet ... - Epitaxial van der Waals heterostructures of Cr2Te3 on 2D material (August 01st, 2023)
For the future integration of 2D materials in spintronic devices (sensors, memories…), the ability to grow van der Waals (vdW) heterostructures combining 2D magnets, high mobility, high spin-orbit coupling (SOC) or topological materials on large ... - Non-volatile electric control of spin-orbit torques in an electron gas (August 01st, 2023)
Spin-orbit torques (SOTs) have the potential to manipulate magnetization using in-plane current, and two-dimensional electron gases (2DEGs) provide a highly efficient spin-to-charge current interconversion. This paper reports the non-volatile electric-field control of SOTs in an ... - Review – From Early Theories of Dzyaloshinskii–Moriya Interactions in Metallic Systems to Today’s Novel Roads (June 09th, 2023)
Albert Fert, Mairbek Chshiev, André Thiaville and Hongxin Yang, J. Phys. Soc. Jpn. 92, 081001 (2023). In this Review article, the authors briefly introduce the research history of DMI and its significance in the field of ... - Spin transfer torque based magnetic sensor and signal conditioning electronics (May 31st, 2023)
A new type of magnetic sensor based on the spin transfer torque using 50-100nm diameter perpendicular magnetic tunnel junctions was recently reported in the IEEE Sensors Journal. The paper demonstrates the magnetic field sensing principle, ... - Book – The basics of electron transport in spintronics: textbook with lectures, exercises and solutions (May 26th, 2023)
Book – The basics of electron transport in spintronics: textbook with lectures, exercises and solutions V. Baltz, EDP Sciences Here is the ideal book to grasp the basic concepts of spin-dependent electron transport and to develop a ... - 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 ... - Micromagnetics 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 ...