212 citations · 1.2k across the 63 of their papers we have counts for
28 papers · 1 filter
jaxFMM: An Adaptive, GPU-Parallel Implementation of the Fast Multipole Method in JAX
Robert Kraft, Florian Bruckner, Dieter Suess +1
We introduce jaxFMM, an open-source, adaptive, highly parallel point-charge Fast Multipole Method implementation for the Laplace kernel written in JAX. It is based on a non-uniform…
Modeling Magnetoelastic Wave Interactions in Magnetic Films and Heterostructures: A finite-difference approach
Peter Flauger, Matthias Küß, Michael Karl Steinbauer +8
The (inverse) magnetostrictive effect in ferromagnets couples the magnetic properties to the mechanical stress, allowing for an interaction between the magnetic and mechanical degr…
Micromagnetic Simulation and Optimization of Spin-Wave Transducers
Florian Bruckner, Kristýna Davídková, Claas Abert +2
The increasing demand for higher data volume and faster transmission in modern wireless telecommunication systems has elevated requirements for 5G high-band RF hardware. Spin-Wave…
NeuralMag: an open-source nodal finite-difference code for inverse micromagnetics
Claas Abert, Florian Bruckner, Andrey Voronov +11
We present NeuralMag, a flexible and high-performance open-source Python library for micromagnetic simulations. NeuralMag leverages modern machine learning frameworks, such as PyTo…
Parallel-in-Time Integration of the Landau-Lifshitz-Gilbert Equation with the Parallel Full Approximation Scheme in Space and Time
Robert Kraft, Sabri Koraltan, Markus Gattringer +3
Speeding up computationally expensive problems, such as numerical simulations of large micromagnetic systems, requires efficient use of parallel computing infrastructures. While pa…
magnum.np -- A PyTorch based GPU enhanced Finite Difference Micromagnetic Simulation Framework for High Level Development and Inverse Design
Florian Bruckner, Sabri Koraltan, Claas Abert +1
magnum.np is a micromagnetic finite-difference library completely based on the tensor library PyTorch. The use of such a high level library leads to a highly maintainable and exten…
Proposal for a micromagnetic standard problem: domain wall pinning at phase boundaries
Paul Heistracher, Claas Abert, Florian Bruckner +2
We propose a novel micromagnetic standard problem calculating the coercive field for unpinning a domain wall at the interface of a multiphase magnet. This problem is sensitive to d…
Dependence of energy barrier reduction on collective excitations in square artificial spin ice: A comprehensive comparison of simulation techniques
Sabri Koraltan, Matteo Pancaldi, Naëmi Leo +9
We perform micromagnetic simulations to study the switching barriers in square artificial spin ice systems consisting of elongated single domain magnetic islands arranged on a squa…
Hybrid FFT algorithm for fast demagnetization field calculations on non-equidistant magnetic layers
Paul Heistracher, Florian Bruckner, Claas Abert +2
In micromagnetic simulations, the demagnetization field is by far the computationally most expensive field component and often a limiting factor in large multilayer systems. We pre…
Large Scale Finite-Element Simulation of Micromagnetic Thermal Noise
Florian Bruckner, Massimiliano d'Aquino, Claudio Serpico +3
An efficient method for the calculation of ferromagnetic resonant modes of magnetic structures is presented. Finite-element discretization allows flexible geometries and location d…
GPU Accelerated Atomistic Energy Barrier Calculations of Skyrmion Annihilations
Paul Heistracher, Claas Abert, Florian Bruckner +2
We present GPU accelerated simulations to calculate the annihilation energy of magnetic skyrmions in an atomistic spin model considering dipole-dipole, exchange, uniaxial-anisotrop…
A fast finite-difference algorithm for topology optimization of permanent magnets
Claas Abert, Christian Huber, Florian Bruckner +3
We present a finite-difference method for the topology optimization of permanent magnets that is based on the FFT accelerated computation of the stray-field. The presented method e…
AC noise reduction based on exchange coupled grains for heat-assisted-magnetic recording: The effect of an FeRh interlayer
Christoph Vogler, Claas Abert, Florian Bruckner +1
High storage density and high data rate are two of the most desired properties of modern hard disk drives. Heat-assisted magnetic recording (HAMR) is believed to achieve both. Reco…
Efficiently reducing transition curvature in heat-assisted magnetic recording with state-of-the-art write heads
Christoph Vogler, Claas Abert, Florian Bruckner +1
The curvature of bit transitions on granular media is a serious problem for the read-back process. We address this fundamental issue and propose a possibility to efficiently reduce…
Significant reduction of critical currents in MRAM designs using dual free layer with perpendicular and in-plane anisotropy
Dieter Suess, Christoph Vogler, Florian Bruckner +2
One essential feature in MRAM cells is the spin torque efficiency, which describes the ratio of the critical switching current to the energy barrier. Within this paper it is report…
Back hopping in spin-transfer-torque devices, possible origin and counter measures
Claas Abert, Hossein Sepehri-Amin, Florian Bruckner +3
The effect of undesirable high-frequency free-layer switching in magnetic multilayer systems, referred to as back hopping, is investigated by means of the spin-diffusion model. A p…
Field- and damping-like spin-transfer torque in magnetic multilayers
Claas Abert, Hossein Sepehri-Amin, Florian Bruckner +3
We investigate the spin-transfer torque in a magnetic multilayer structure by means of a spin-diffusion model. The torque in the considered system, consisting of two magnetic layer…
Solving Large-Scale Inverse Magnetostatic Problems using the Adjoint Method
Florian Bruckner, Claas Abert, Gregor Wautischer +4
An efficient algorithm for the reconstruction of the magnetization state within magnetic components is presented. The occurring inverse magnetostatic problem is solved by means of…
Highly Parallel Demagnetization Field Calculation Using the Fast Multipole Method on Tetrahedral Meshes with Continuous Sources
Pietro Palmesi, Lukas Exl, Florian Bruckner +2
The long-range magnetic field is the most time-consuming part in micromagnetic simulations. Improvements both on a numerical and computational basis can relief problems related to…
A self-consistent spin-diffusion model for micromagnetics
Claas Abert, Michele Ruggeri, Florian Bruckner +4
We propose a three-dimensional micromagnetic model that dynamically solves the Landau-Lifshitz-Gilbert equation coupled to the full spin-diffusion equation. In contrast to previous…
Macroscopic Simulation of Isotropic Permanent Magnets
Florian Bruckner, Claas Abert, Christoph Vogler +6
Accurate simulations of isotropic permanent magnets require to take the magnetization process into account and consider the anisotropic, nonlinear, and hysteretic material behaviou…
Calculating thermal stability and attempt frequency of advanced recording structures without free parameters
Christoph Vogler, Florian Bruckner, Dieter Suess +1
Ensuring a permanent increase of magnetic storage densities is one of the main challenges in magnetic recording. Conventional approaches based on single phase grains are not suitab…
A full-fledged micromagnetic code in less than 70 lines of NumPy
Claas Abert, Florian Bruckner, Christoph Vogler +3
We present a complete micromagnetic finite-difference code in less than 70 lines of Python. The code makes largely use of the NumPy library and computes the exchange field by finit…
Landau-Lifshitz-Bloch equation for exchange coupled grains
Christoph Vogler, Claas Abert, Florian Bruckner +1
Heat assisted recording is a promising technique to further increase the storage density in hard disks. Multilayer recording grains with graded Curie temperature is discussed to fu…