Results 61 to 70 of about 3,440 (189)

Vortex mechanics in planar nano-magnets

, 2013
A collective-variable approach for the study of non-linear dynamics of magnetic textures in planar nano-magnets is proposed. The variables are just arbitrary parameters (complex or real) in the specified analytical function of a complex variable ...
Metlov, Konstantin L.
core   +1 more source

Thermal vortex dynamics in thin circular ferromagnetic nanodisks [PDF]

, 2012
The dynamics of gyrotropic vortex motion in a thin circular nanodisk of soft ferromagnetic material is considered. The demagnetization field is calculated using two-dimensional Green's functions for the thin film problem and fast Fourier transforms.
G. M. Wysin, G. M. Wysin, G. M. Wysin, U. Nowak, W. Figueiredo, Zhongyi Huang   +5 more
core   +2 more sources

Current‐Driven Nonreciprocal Response of Nonequilibrium Skyrmions

Advanced Science, EarlyView.
A skyrmion holds great promise for spintronic applications owing to its intrinsic topological stability and high mobility under ultra‐low current excitation. Here, by means of in situ electron microscopy, we demonstrate a skyrmion diode effect and the associated current‐driven nonreciprocal skyrmion dynamics in a designed FeGe‐based microdevice.
Xiuzhen Yu, Soju Furuta, Xichao Zhang, Yi‐Ling Chiew, Kiyomi Nakajima, Kosuke Karube, Naoya Kanazawa, Yasujiro Taguchi, Yoshinori Tokura, Masahito Mochizuki, Fumitaka Kagawa   +10 more
wiley   +1 more source

LaBonte's method revisited: An effective steepest descent method for micromagnetic energy minimization

, 2013
We present a steepest descent energy minimization scheme for micromagnetics. The method searches on a curve that lies on the sphere which keeps the magnitude of the magnetization vector constant. The step size is selected according to a modified Barzilai-
Bance, Simon, Exl, Lukas, Mauser, Norbert J., Reichel, Franz, Schrefl, Thomas, Stimming, Hans Peter   +5 more
core   +2 more sources

Dynamics of perpendicular recording heads [PDF]

, 2001
3D modeling and inductance measurements were used to design an ultra-high frequency perpendicular system. Kerr microscopy and spin-stand experiments with focused ion beam (FI-B) trimmed perpendicular heads and perpendicular media directly verified the ...
Bain, J., Chantrell, R.W., Chomko, R., Khizroev, S., Litvinov, D., Svedberg, E., White, R., Wolfson, J.   +7 more
core   +1 more source

Enhanced High Dimensionality and the Information Processing Capacity in Interfered Spin Wave‐Based Reservoir Computing, Achieved With Eight Detectors

Advanced Electronic Materials, EarlyView.
Physical reservoir computing (PRC) based on spin wave interference has demonstrated high computational performance, yet room for improvement remains. In this study, we fabricated this concept PRC with eight detectors and evaluated the impact of the number of detectors using a chaotic time series prediction task.
Sota Hikasa, Wataru Namiki, Daiki Nishioka, Maki Nishimura, Ryo Iguchi, Kazuya Terabe, Takashi Tsuchiya   +6 more
wiley   +1 more source

Controlling the Skyrmion Density and Size for Quantized Convolutional Neural Network

IEEE Access
The exceptional properties of skyrmion devices, including their miniature size, topologically protected nature, and low current requirements, render them highly promising for energy-efficient neuromorphic computing applications.
Aijaz H. Lone, Arnab Ganguly, Hanrui Li, Nazek El-Atab, Gianluca Setti, Gobind Das, and Hossein Fariborzi   +6 more
doaj   +1 more source

Dzyaloshinskii-Moriya chiral magnets and boundary conditions in Skyrmion electronics [PDF]

, 2017
Skyrmion-based electronic devices are a subset of spintronic nanodevices based on chiral materials (1, 2). The Dzyaloshinskii-Moriya (D-M) interaction is a chiral magnetic interaction which models chiral magnetic materials showing particular promise for
Kotiuga, P. Robert
core  

Weak solutions of the Landau--Lifshitz--Bloch equation

, 2016
The Landau--Lifshitz--Bloch (LLB) equation is a formulation of dynamic micromagnetics valid at all temperatures, treating both the transverse and longitudinal relaxation components important for high-temperature applications.
Le, Kim Ngan
core   +1 more source

Harnessing Digital Microstructure for Simulation‐Guided Optimization of Permanent Magnets

Advanced Intelligent Discovery, EarlyView.
An experimental‐to‐computational workflow is presented that transforms experimental 3D focused ion beam‐scanning electron microscopy data into a simulation‐ready digital microstructure for multiphase functional materials. Using heavy‐rare‐earth‐free Nd–Fe–B magnets as a model system, the approach quantifies grain connectivity across complex secondary ...
Nikita Kulesh, Anton Bolyachkin, Hajime Nakamura, Tadakatsu Ohkubo, Hossein Sepehri‐Amin   +4 more
wiley   +1 more source