656 citations · 2.1k across the 27 of their papers we have counts for
28 papers
Implementing Binarized Neural Networks with Magnetoresistive RAM without Error Correction
Tifenn Hirtzlin, Bogdan Penkovsky, Jacques-Olivier Klein +5
One of the most exciting applications of Spin Torque Magnetoresistive Random Access Memory (ST-MRAM) is the in-memory implementation of deep neural networks, which could allow impr…
Designing large arrays of interacting spin-torque nano-oscillators for microwave information processing
Philippe Talatchian, Miguel Romera, Flavio Abreu Araujo +6
Arrays of spin-torque nano-oscillators are promising for broadband microwave signal detection and processing, as well as for neuromorphic computing. In many of these applications,…
Microwave neural processing and broadcasting with spintronic nano-oscillators
P. Talatchian, M. Romera, S. Tsunegi +14
Can we build small neuromorphic chips capable of training deep networks with billions of parameters? This challenge requires hardware neurons and synapses with nanometric dimension…
Use of Magnetoresistive Random-Access Memory as Approximate Memory for Training Neural Networks
Nicolas Locatelli, Adrien F. Vincent, Damien Querlioz
Hardware neural networks that implement synaptic weights with embedded non-volatile memory, such as spin torque memory (ST-MRAM), are a major lead for low energy artificial intelli…
Nano-oscillator-based classification with a machine learning-compatible architecture
Damir Vodenicarevic, Nicolas Locatelli, Julie Grollier +1
Pattern classification architectures leveraging the physics of coupled nano-oscillators have been demonstrated as promising alternative computing approaches, but lack effective lea…
Circuit-Level Evaluation of the Generation of Truly Random Bits with Superparamagnetic Tunnel Junctions
Damir Vodenicarevic, Nicolas Locatelli, Alice Mizrahi +4
Many emerging alternative models of computation require massive numbers of random bits, but their generation at low energy is currently a challenge. The superparamagnetic tunnel ju…
Vowel recognition with four coupled spin-torque nano-oscillators
Miguel Romera, Philippe Talatchian, Sumito Tsunegi +14
Substantial evidence indicates that the brain uses principles of non-linear dynamics in neural processes, providing inspiration for computing with nanoelectronic devices. However,…
A Neural Network Based on Synchronized Pairs of Nano-Oscillators
Damir Vodenicarevic, Nicolas Locatelli, Damien Querlioz
Artificial neural networks are intensively used to perform cognitive tasks such as image classification on traditional computers. With the end of CMOS scaling and increasing demand…
Low-Energy Truly Random Number Generation with Superparamagnetic Tunnel Junctions for Unconventional Computing
Damir Vodenicarevic, Nicolas Locatelli, Alice Mizrahi +10
Low-energy random number generation is critical for many emerging computing schemes proposed to complement or replace von Neumann architectures. However, current random number gene…
Role of spin-transfer torques on synchronization and resonance phenomena in stochastic magnetic oscillators
Artur Accioly, Nicolas Locatelli, Alice Mizrahi +4
A theoretical study on how synchronization and resonance-like phenomena in superparamagnetic tunnel junctions can be driven by spin-transfer torques is presented. We examine the ma…
Synchronization Detection in Networks of Coupled Oscillators for Pattern Recognition
Damir Vodenicarevic, Nicolas Locatelli, Julie Grollier +1
Coupled oscillator-based networks are an attractive approach for implementing hardware neural networks based on emerging nanotechnologies. However, the readout of the state of a co…
Synchronization of electrically coupled stochastic magnetic oscillators induced by thermal and electrical noise
A. Mizrahi, N. Locatelli, J. Grollier +1
Superparamagnetic tunnel junctions are nanostructures that auto-oscillate stochastically under the effect of thermal noise. Recent works showed that despite their stochasticity, su…
Controlling the phase locking of unstable magnetic bits for ultra-low power computation
A. Mizrahi, N. Locatelli, R. Lebrun +6
When fabricating magnetic memories, one of the main challenges is to maintain the bit stability while downscaling. Indeed, for magnetic volumes of a few thousand nm3, the energy ba…
Optimizing magneto-dipolar interactions for synchronizing vortex based spin-torque nano-oscillators
F. Abreu Araujo, A. D. Belanovsky, P. N. Skirdkov +8
We report on a theoretical study about the magneto-dipolar coupling and synchronization between two vortex-based spin-torque nano-oscillators. In this work we study the dependence…
Efficient Synchronization of Dipolarly Coupled Vortex-Based Spin Transfer Nano-Oscillators
N. Locatelli, A. Hamadeh, F. Abreu Araujo +10
Due to their nonlinear properties, spin transfer nano-oscillators can easily adapt their frequency to external stimuli. This makes them interesting model systems to study the effec…
Understanding of phase noise squeezing under fractional synchronization of non-linear spin transfer vortex oscillator
R. Lebrun, A. Jenkins, A. Dussaux +10
We investigate experimentally the synchronization of a vortex based spin transfer oscillator to an external rf current whose frequency is at multiple integers, as well as half inte…
Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics
Nicolas Locatelli, Romain Lebrun, Vladimir V. Naletov +5
We perform a comparative study of spin transfer induced excitation of the gyrotropic motion of a vortex core with either uniform or vortex spin polarizers. The microwave output vol…
Nonlinear behavior and mode coupling in spin transfer nano-oscillators
Romain Lebrun, Nicolas Locatelli, Flavio Abreu Araujo +7
By investigating thoroughly the tunable behavior of coupled modes, we highlight how it provides new means to handle the properties of spin transfer nano-oscillators. We first demon…
Noise-enhanced synchronization of stochastic magnetic oscillators
Nicolas Locatelli, Alice Mizrahi, Artur Accioloy +9
We present an experimental study of phase-locking in a stochastic magnetic oscillator. The system comprises a magnetic tunnel junction with a superparamagnetic free layer, whose ma…
Spin torque building blocks
Nicolas Locatelli, Vincent Cros, Julie Grollier
The discovery of the spin torque effect has made magnetic nanodevices realistic candidates for active elements of memory devices and applications. Magnetoresistive effects allow th…
Perfect and robust phase-locking of a spin transfer vortex nano-oscillator to an external microwave source
A. Hamadeh, Nicolas Locatelli, V. V. Naletov +5
We study the synchronization of the auto-oscillation signal generated by the spin transfer driven dynamics of two coupled vortices in a spin-valve nanopillar to an external source.…
Origin of spectral purity and tuning sensitivity in a vortex-based spin transfer nano-oscillator
A. Hamadeh, Grégoire De Loubens, Olivier Klein +5
We investigate the microwave characteristics of a spin transfer nano-oscillator (STNO) based on coupled vortices as a function of the perpendicular magnetic field . While…
Non-Adlerian synchronization of dipolar coupled vortex Spin-Torque Nano-Oscillators
A. D. Belanovsky, N. Locatelli, P. N. Skirdkov +5
We investigate analytically and numerically the synchronization dynamics of dipolarly coupled vortex based Spin-Torque Nano Oscillators (STNO) with different pillar diameters. We i…
Reversal process of a magnetic vortex core under the combined action of a perpendicular field and spin transfer torque
N. Locatelli, A. E. Ekomasov, A. V. Khvalkovskiy +5
In a nanopillar with dipolarly coupled vortices, we present an experimental and simulation study to understand how the interplay between the bias field and spin transfer torque imp…