212 citations · 956 across the 41 of their papers we have counts for
45 papers
Chiral switching and dynamic barrier reductions in artificial square ice
Naëmi Leo, Matteo Pancaldi, Sabri Koraltan +10
Collective dynamics in lithographically-defined artificial spin ices offer profound insights into emergent correlations and phase transitions of geometrically-frustrated Ising spin…
Dipolar-stabilized first and second-order antiskyrmions in ferrimagnetic multilayers
Michael Heigl, Sabri Koraltan, Marek Vaňatka +13
Skyrmions and antiskyrmions are topologically protected spin structures with opposite topological charge. Particularly in coexisting phases, these two types of magnetic quasi-parti…
Spin-canting effects in GMR sensors with wide dynamic field range
Clemens Muehlenhoff, Christoph Vogler, Wolfgang Raberg +2
Magnetoresistive (xMR) sensors find extensive application in science and industry, replacing Hall sensors in various low field environments. While there have been some efforts in i…
Microscopic origin of magnetization reversal in exchange-coupled ferro-/ferrimagnetic bilayers
Michael Heigl, Christoph Vogler, Andrada-Oana Mandru +4
In this study, the magnetic reversal process of exchange-coupled bilayer systems, consisting of a ferrimagnetic TbFeCo alloy layer and a ferromagnetic [Co/Ni/Pt]N multilayer, was i…
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…
Hysteresis-free magnetization reversal of exchange-coupled bilayers with finite magnetic anisotropy
Christoph Vogler, Michael Heigl, Andrada-Oana Mandru +5
Exchange-coupled structures consisting of ferromagnetic and ferrimagnetic layers become technologically more and more important. We show experimentally the occurrence of completely…
Statistical analysis of read-back signals in magnetic recording on granular media
Florian Slanovc, Christoph Vogler, Olivia Muthsam +1
The comprehensive simulation of magnetic recording, including the write and read-back process, on granular media becomes computationally expensive if the magnetization dynamics of…
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…
Write head design for effective curvature reduction in heat-assisted magnetic recording by topology optimization
Olivia Muthsam, Christoph Vogler, Florian Bruckner +1
The reduction of the transition curvature of written bits in heat-assisted magnetic recording (HAMR) is expected to play an important role for the future areal density increase of…
Improving the Signal-to-noise Ratio for Heat-Assisted Magnetic Recording by Optimizing a High/Low Tc bilayer structure
Olivia Muthsam, Florian Slanovc, Christoph Vogler +1
We optimize the recording medium for heat-assisted magnetic recording by using a high/low bilayer structure to reduce AC and DC noise. Compared to a former work, s…
Systematic parameterization of heat-assisted magnetic recording switching probabilities and the consequences for the resulting SNR
Florian Slanovc, Christoph Vogler, Olivia Muthsam +1
The signal-to-noise ratio (SNR) of a bit series written with heat-assisted magnetic recording (HAMR) on granular media depends on a large number of different parameters. The choice…
The superior role of the Gilbert damping on the signal-to-noise ratio in heat-assisted magnetic recording
Olivia Muthsam, Florian Slanovc, Christoph Vogler +1
In magnetic recording the signal-to-noise ratio (SNR) is a good indicator for the quality of written bits. However, a priori it is not clear which parameters have the strongest inf…
Path sampling for lifetimes of metastable magnetic skyrmions and direct comparison with Kramers' method
L. Desplat, C. Vogler, J. -V. Kim +2
We perform a direct comparison between Kramers' method in many dimensions -- i.e., Langer's theory -- adapted to magnetic spin systems, and a path sampling method in the form of fo…
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…
Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording
Olivia Muthsam, Christoph Vogler, Dieter Suess
We investigate how a temperature reduction in z-direction influences the switching probability and the noise in heat-assisted magnetic recording (HAMR) for a bit in bit-patterned m…
Stochastic ferrimagnetic Landau-Lifshitz-Bloch equation for finite magnetic structures
Christoph Vogler, Claas Abert, Florian Bruckner +1
Precise modeling of the magnetization dynamics of nanoparticles with finite size effects at fast varying temperatures is a computationally challenging task. Based on the Landau-Lif…
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…
Topologically Protected Vortex Structures to Realize Low-Noise Magnetic Sensors
Dieter Suess, Anton Bachleitner-Hofmann, Armin Satz +11
Micromagnetic sensors play a major role towards the miniaturization in the industrial society. The adoption of new and emerging sensor technologies like anisotropic magnetoresistan…
Contactless and absolute linear displacement detection based upon 3D printed magnets combined with passive radio-frequency identification
Roman Windl, Claas Abert, Florian Bruckner +4
Within this work a passive and wireless magnetic sensor, to monitor linear displacements is proposed. We exploit recent advances in 3D printing and fabricate a polymer bonded magne…
Noise reduction in heat-assisted magnetic recording by optimizing a high/low Tc bilayer structure
Olivia Muthsam, Christoph Vogler, Dieter Suess
It is assumed that heat-assisted magnetic recording (HAMR) is the recording technique of the future. For pure hard magnetic grains in high density media with an average diameter of…
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…
Spin Torque Efficiency and Analytic Error Rate Estimates of Skyrmion Racetrack Memory
Dieter Suess, Christoph Vogler, Florian Bruckner +2
In this paper the thermal stability of skyrmion bubbles and the critical currents to move them over pinning sites is investigated. For the used pinning geometries and the used para…
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…