Publications (30)
A spinwave Ising machine
Artem Litvinenko, Roman Khymyn, Victor H. González +4
We demonstrate a spin-wave-based time-multiplexed Ising Machine (SWIM), implemented using a 5 m thick Yttrium Iron Garnet (YIG) film and off-the-shelf microwave components. The…
Spintronic nano-scale harvester of broadband microwave energy
Bin Fang, Mario Carpentieri, Steven Louis +15
The harvesting of ambient radio-frequency (RF) energy is an attractive and clean way to realize the idea of self-powered electronics. Here we present a design for a microwave energ…
Ultra-fast artificial neuron: generation of picosecond-duration spikes in a current-driven antiferromagnetic auto-oscillator
Roman Khymyn, Ivan Lisenkov, Jamie Voorheis +5
We demonstrate analytically and numerically, that a thin film of an antiferromagnetic (AFM) material, having biaxial magnetic anisotropy and being driven by an external spin-transf…
Interface-Induced Phenomena in Magnetism
Frances Hellman, Axel Hoffmann, Yaroslav Tserkovnyak +24
This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and in…
A CMOS+X Spiking Neuron With On-Chip Machine Learning
Steven Louis, Matthew Blake Abramson, Hannah Bradley +8
We present the design and numerical simulation of a spiking neuron capable of on-chip machine learning. Built within the CMOS+X framework, the spiking neuron consists of an NMOS tr…
Artificial neurons based on antiferromagnetic auto-oscillators as a platform for neuromorphic computing
Hannah Bradley, Steven Louis, Cody Trevillian +4
Spiking artificial neurons emulate the voltage spikes of biological neurons, and constitute the building blocks of a new class of energy efficient, neuromorphic computing systems.…
Vector Hamiltonian Formalism for Nonlinear Magnetization Dynamics
Vasyl Tyberkevych, Andrei Slavin, Petro Artemchuk +1
Vector Hamiltonian formalism (VHF) for the description of a weakly nonlinear magnetization dynamics has been developed. Transformation from the traditional Landau-Lifshitz equation…
Ferromagnetic resonance force spectroscopy of individual sub-micron size samples
Olivier Klein, G. De Loubens, V. V. Naletov +7
We review how a magnetic resonance force microscope (MRFM) can be applied to perform ferromagnetic resonance (FMR) spectroscopy of \emph{individual} sub-micron size samples. We res…
Resonant Nonlinear Damping of Quantized Spin Waves in Ferromagnetic Nanowires
Carl Boone, Jordan Katine, Jeff Childress +5
We use spin torque ferromagnetic resonance to measure the spectral properties of dipole-exchange spin waves in permalloy nanowires. Our measurements reveal that geometric confineme…
Bias-free spin-wave phase shifter for magnonic logic
Steven Louis, Ivan Lisenkov, Sergey Nikitov +2
A design of a magnonic phase shifter operating without an external bias magnetic field is proposed. The phase shifter uses a localized collective spin wave mode propagating along a…
Theoretical formalism for collective spin-wave edge excitations in arrays of dipolarly interacting magnetic nanodots
Ivan Lisenkov, Vasyl Tyberkevych, Sergey Nikitov +1
A general theory of edge spin wave excitations in semi-infinite and finite periodic arrays of magnetic nanodots existing in a spatially uniform magnetization ground state is develo…
Interaction of microwave photons with nanostructured magnetic metasurfaces
Ivan Lisenkov, Vasyl Tyberkevych, Luke Levin-Pompetski +4
A theoretical formalism for the description of the interaction of microwave photons with a thin (compared to the photon wavelength) magnetic metasurface comprised of dipolarly inte…
Antiferromagnetic THz-frequency Josephson-like Oscillator Driven by Spin Current
Roman Khymyn, Ivan Lisenkov, Vasyl Tiberkevich +2
The development of compact and tunable room temperature sources of coherent THz-frequency signals would open a way for numerous new applications. The existing approaches to THz-fre…
Three-dimensional Character of the Magnetization Dynamics in Magnetic Vortex Structures - Hybridization of Flexure Gyromodes with Spin Waves
Matthias Noske, Hermann Stoll, Manfred Fähnle +8
Three-dimensional linear spin-wave eigenmodes of a Permalloy disk having finite thickness are studied by micromagnetic simulations based on the Landau-Lifshitz-Gilbert equation. Th…
Adaptive Ising machine based on phase-locking of an auto-oscillator to a bi-harmonic external driving with noise
Eleonora Raimondo, Andrea Grimaldi, Vasyl Tyberkevych +6
We introduce a universal theory of phase auto-oscillators driven by a bi harmonic signal (having frequency components close to single and double of the free-running oscillator freq…
Spin wave mediated unidirectional Vortex Core Reversal by Two Orthogonal Monopolar Field Pulses: The Essential Role of Three-dimensional Magnetization Dynamics
Matthias Noske, Hermann Stoll, Manfred Fähnle +8
Scanning transmission x-ray microscopy is employed to investigate experimentally the reversal of the magnetic vortex core polarity in cylindrical Ni81Fe19 nanodisks triggered by tw…
Oscillatory transient regime in the forced dynamics of a spin torque nano-oscillator
Yan Zhou, Vasil Tiberkevich, Ezio Iacocca +2
We demonstrate that the transient non-autonomous dynamics of a spin torque nano-oscillator (STNO) under a radio-frequency (rf) driving signal is qualitatively different from the dy…
Generation of Ultra-Broadband Frequency Comb in Strongly Bistable Nonlinear Magnonic Resonator
Yu Jiang, Vasyl Tyberkevych, Yizhong Huang +4
Magnonic frequency combs (MFCs) offer a promising route to compact, energy-efficient platforms for on-chip coherent microwave signal generation and processing. Conventional on-chip…
Low Power Microwave Signal Detection With a Spin-Torque Nano-Oscillator in the Active Self-Oscillating Regime
Steven Louis, Vasyl Tyberkevych, Jia Li +6
A spin-torque nano-oscillator (STNO) driven by a ramped bias current can perform spectrum analysis quickly over a wide frequency bandwidth. The STNO spectrum analyzer operates by i…
Micromagnetic modeling of Terahertz oscillations in an antiferromagnetic material driven by spin-Hall effect
Vito Puliafito, Roman Khymyn, Mario Carpentieri +4
The realization of THz sources is a fundamental aspect for a wide range of applications. Over different approaches, compact THz oscillators can be realized taking advantage of dyna…
Pattern recognition using spiking antiferromagnetic neurons
Hannah Bradley, Steven Louis, Andrei Slavin +1
Spintronic devices offer a promising avenue for the development of nanoscale, energy-efficient artificial neurons for neuromorphic computing. It has previously been shown that with…
Noise properties of a resonance-type spin-torque microwave detector
Oleksandr Prokopenko, Gennadiy Melkov, Elena Bankowski +3
We analyze performance of a resonance-type spin-torque microwave detector (STMD) in the presence of noise and reveal two distinct regimes of STMD operation. In the first (high-freq…
Reconfigurable nano-scale spin-wave directional coupler
Qi Wang, Philipp Pirro, Roman Verba +3
A spin-wave (SW) directional coupler comprised of two laterally parallel nano-scale dipolarly-coupled SW waveguides is proposed and studied using micromagnetic simulations and anal…
Theory of three-magnon interaction in a vortex-state magnetic nanodot
Roman Verba, Lukas Körber, Katrin Schultheiss +3
We use vector Hamiltonian formalism (VHF) to study theoretically three-magnon parametric interaction (or three-wave splitting) in a magnetic disk existing in a magnetic vortex grou…
Microwave power generated by a spin-torque oscillator in the presence of noise
Vasil Tiberkevich, Joo-Von Kim, Andrei Slavin
An expression for the microwave power generated by a spin-torque oscillator in the presence of thermal noise is derived. This expression, when used in a subcritical regime, demonst…
Ultra-fast wide band spectrum analyzer based on a rapidly tuned spin-torque nano-oscillator
Steven Louis, Olga Sulymenko, Vasyl Tyberkevych +7
A spintronic method of ultra-fast broadband microwave spectrum analysis is proposed. It uses a rapidly tuned spin torque nano-oscillator (STNO), and does not require injection lock…
Spectroscopy of the parametric magnons excited by 4-wave process
G. De Loubens, V. V. Naletov, Vincent Charbois +3
Using a Magnetic Resonace Force Microscope, we have performed ferromagnetic resonance (FMR) spectroscopy on parametric magnons created by 4-wave process. This is achieved by measur…
Parametric excitation of a magnetic nanocontact by a microwave field
Sergei Urazhdin, Vasyl Tiberkevich, Andrei Slavin
We demonstrate that magnetic oscillations of a current-biased magnetic nanocontact can be parametrically excited by a microwave field applied at twice the resonant frequency of the…
Ultra-fast GHz-range swept-tuned spectrum analyzer with 20 ns temporal resolution based on a spin-torque nano-oscillator with a uniformly magnetized 'free' layer
Artem Litvinenko, Ahmed Sidi El Valli, Vadym Iurchuk +5
The advantage of an ultra-fast frequency-tunability of spin-torque nano-oscillators (STNOs) that have large (> 100MHz) relaxation frequency of amplitude fluctuations is exploited t…
Spintronic Neuron Using a Magnetic Tunnel Junction for Low-Power Neuromorphic Computing
Steven Louis, Hannah Bradley, Cody Trevillian +2
This paper proposes a novel spiking artificial neuron design based on a combined spin valve/magnetic tunnel junction (SV/MTJ). Traditional hardware used in artificial intelligence…