Skyrmion Formation in Nanodisks Using Magnetic Force Microscopy Tip

Zelent, Mateusz; Vetrova, Iu. V.; Šoltýs, J.; Li, Xiaoguang; Zhou, Yan; Gubanov, V. A.; Садовников, А. В.; Ščepka, T.; Dérer, J.; Stoklas, R.; Cambel, V.; Mruczkiewicz, M.

doi:10.3390/nano11102627

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…This has motivated research investigating the potential use of skyrmions as information carriers in ferromagnetic nanodisks [84][85][86][87], nanotracks [88] and other confined geometries [89,90]. This research also includes theoretical studies of thermal stability [91][92][93] as well as experimental observations [94]. Just as with a decreasing field, reduction of the density of skyrmions in a confined magnet causes them to decay into meandering stripes, as shown in Fig.…”

Section: Applicationsmentioning

confidence: 99%

Thermally Activated Transitions Between Micromagnetic States

Chaves-O'Flynn¹,

Stein²

2022

Preprint

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We review work by the authors on thermal activation in nanoscopic magnetic systems. These systems present unique difficulties in analyzing noise-induced escape over a barrier, including the presence of nonlocal interactions, nongradient terms in the energy functional, and dynamical textures as initial or saddle states. We begin with a discussion of magnetic reversal between single-domain configurations of the magnetization. Here the transition (saddle) state can be either a single-domain or a spatially varying (instanton-like) configuration, and depending on the system parameters can exhibit either Arrhenius or non-Arrhenius reversal rates. We then turn to a discussion of transitions between magnetic textures, which can be either static and topologically protected or dynamic and not topologically protected. An example of the latter case is the droplet soliton, a rotating nontopologically-protected configuration, which we find can occur either as a metastable or transition state in a nanoscopic magnetic system. After discussing various issues in calculating transition rates, we present results for the activation barriers for creation and annihilation of these magnetic textures. We conclude with a discussion of activated transitions between topologically protected skyrmion textures and other configurations, on which work is ongoing.

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Section: Applicationsmentioning

confidence: 99%

Thermally Activated Transitions Between Micromagnetic States

Chaves-O'Flynn¹,

Stein²

2022

Preprint

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“…These include the use of magnetic [203,204] or electric elds [205], electric currents [46,206,207], thermal gradients [208], besides skyrmion generation during a sample remagnetization process [70,209], induced by magnetic force microscopy tip [210], geometrical constrictions from domain walls [211,212] or laser heating [213][214][215][216][217]. The racetrack memories require high skyrmion velocities, so enhancing torque-induced motion of skyrmion, i.e., electric current.…”

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confidence: 99%