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Hysteresis-Loop Criticality in Disordered Ferromagnets–A Comprehensive Review of Computational Techniques

Computer modeling in Engineering & Sciences 2025年第2期142卷 1021-1107页

作者： Djordje Spasojevic Sanja Janicevic Svetislav Mijatovic Bosiljka Tadic Faculty of Physics University of BelgradeBelgrade11001Serbia Faculty of Science University of KragujevacKragujevac34000Serbia Department for Theoretical Physics Jozef Stefan InstituteLjubljanaSl-1001Slovenia Complexity Science Hub Josephstaedterstrasse 39Vienna1080Austria

Disordered ferromagnets with a domain structure that exhibit a hysteresis loop when driven by the external magnetic field are essential materials for modern technological ***,the understanding and potential for controlling the hysteresis phenomenon in thesematerials,especially concerning the disorder-induced critical behavior on the hysteresis loop,have attracted significant experimental,theoretical,and numerical research *** review the challenges of the numerical modeling of physical phenomena behind the hysteresis loop critical behavior in disordered ferromagnetic systems related to the non-equilibriumstochastic dynamics of domain walls driven by external ***,using the extended random field ising model,we present different simulation approaches and advanced numerical techniques that adequately describe the hysteresis loop shapes and the collective nature of the magnetization fluctuations associated with the criticality of the hysteresis loop for different sample shapes and varied parameters of disorder and rate of change of the external field,as well as the influence of thermal fluctuations and demagnetizing *** studied examples demonstrate how these numerical approaches reveal newphysical insights,providing quantitativemeasures of pertinent variables extracted from the systems’simulated or experimentally measured Barkhausen noise *** described computational techniques using inherent scale-invariance can be applied to the analysis of various complex systems,both quantum and classical,exhibiting non-equilibrium dynamical critical point or self-organized criticality.

关键词： Disordered ferromagnets hysteresis-loop criticality magnetization-reversal avalanches in simulations and experiments zero-temperature and thermal random field ising model simulations computational techniques for multiparameter scaling analysis multifractal Barkhausen noise finite driving rates demagnetizing effects nonequilibrium critical dynamics

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