Experimental approaches for micromagnetic coercivity analysis of advanced permanent magnet materials [PDF]
Science and Technology of Advanced Materials, 2021 Although coercivity is one of the fundamental properties of permanent magnets, it has not been well understood. In this paper, micromagnetics and thermal activation magnetization reversal theories are briefly reviewed, and then our recent macroscopic and
Satoshi Okamoto
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Virtual Micromagnetics: A Framework for Accessible and Reproducible Micromagnetic Simulation
Journal of Open Research Software, 2016 Computational micromagnetics requires numerical solution of partial differential equations to resolve complex interactions in magnetic nanomaterials. The Virtual Micromagnetics project described here provides virtual machine simulation environments to ...
Mark Vousden +3 more
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Advanced Modeling and Simulation of Multilayer Spin–Transfer Torque Magnetoresistive Random Access Memory with Interface Exchange Coupling [PDF]
MicromachinesIn advancing the study of magnetization dynamics in STT-MRAM devices, we employ the spin drift–diffusion model to address the back-hopping effect. This issue manifests as unwanted switching either in the composite free layer or in the reference layer in ...
Mario Bendra +4 more
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Field-Driven Magnetic Phase Diagram and Vortex Stability in Fe Nanometric Square Prisms [PDF]
Nanomaterials, 2022 In this work, we deal with the zero temperature hysteretic properties of iron (Fe) quadrangular nanoprisms and the size conditions underlying magnetic vortex states formation.
Mauricio Galvis +2 more
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Variational principles of micromagnetics revisited [PDF]
SIAM Journal on Mathematical Analysis, 2019 We revisit the basic variational formulation of the minimization problem associated with the micromagnetic energy, with an emphasis on the treatment of the stray field contribution to the energy, which is intrinsically non-local.
Di Fratta, Giovanni +3 more
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IUCrJ, 2020 Small-angle scattering of X-rays and neutrons is a routine method for the determination of nanoparticle sizes. The so-called Guinier law represents the low-q approximation for the small-angle scattering curve from an assembly of particles.
Andreas Michels +6 more
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NeuralMag: an open-source nodal finite-difference code for inverse micromagnetics [PDF]
npj Computational MaterialsWe present NeuralMag, a flexible and high-performance open-source Python library for micromagnetic simulations. NeuralMag leverages modern machine learning frameworks, such as PyTorch and JAX, to perform efficient tensor operations on various parallel ...
C. Abert +13 more
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Dephasing-Assisted Macrospin Transport [PDF]
Entropy, 2020 Transport phenomena are ubiquitous in physics, and it is generally understood that the environmental disorder and noise deteriorates the transfer of excitations. There are, however, cases in which transport can be enhanced by fluctuations. In the present
Stefano Iubini +4 more
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Virtual experiments in computational magnetism with mag2exp [PDF]
npj Computational MaterialsWe have designed and implemented the Python package mag2exp, which enables researchers to perform a range of virtual experiments given a spatially resolved vector field for the magnetization, a typical result from computational methods to simulate ...
Samuel J. R. Holt +9 more
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Structural Design of High-Coercivity Nd-Ce-Fe-B Magnets with Easy Axis Perpendicular Orientation and High-Abundance Ce Content Based on Micromagnetic Simulations [PDF]
NanomaterialsIn recent years, replacing the scarce and expensive rare earth element Nd with the more abundant and lower cost Ce in the production of Nd-Ce-Fe-B permanent magnets has become a focus of both industrial and academic research.
Qian Zhao +7 more
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