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The bilayer skyrmion composed of upper and lower tightly coupled skyrmions on two layers with completely compensated topological charges (called as anti-topology here), has become one feasible improvement of conventional skyrmion to realize…

Mesoscale and Nanoscale Physics · Physics 2026-04-13 Lewei Zhou , Jun Chen , Zhong Shen , Shuai Dong , Xiaoyan Yao

Magnetic skyrmionium can be used as a nanometer-scale non-volatile information carrier, which shows no skyrmion Hall effect due to its special structure carrying zero topological charge. Here, we report the static and dynamic properties of…

Mesoscale and Nanoscale Physics · Physics 2020-07-10 Jing Xia , Xichao Zhang , Motohiko Ezawa , Oleg A. Tretiakov , Zhipeng Hou , Wenhong Wang , Guoping Zhao , Xiaoxi Liu , Hung T. Diep , Yan Zhou

We investigate the dynamics of two skyrmions lying in distinct layers of an antiferromagnetic bilayer system, consisting of nanostripes with the shape of racetracks. The top and bottom nanostripes are separated by a height offset and they…

Mesoscale and Nanoscale Physics · Physics 2022-02-09 R. C. Silva , R. L. Silva , V. L. Carvalho-Santos , W. A. Moura-Melo , A. R. Pereira

Magnetic bimeron is a topological counterpart of skyrmions in in-plane magnets, which can be used as a spintronic information carrier. We report the static properties of bimerons with different topological structures in a frustrated…

Mesoscale and Nanoscale Physics · Physics 2020-04-29 Xichao Zhang , Jing Xia , Laichuan Shen , Motohiko Ezawa , Oleg A. Tretiakov , Guoping Zhao , Xiaoxi Liu , Yan Zhou

We numerically and analytically study the transient dynamics of magnetic skyrmions in synthetic antiferromagnets under a magnetic field gradient. We consider skyrmions in a bilayer with antiferromagnetic coupling between the layers. The…

Mesoscale and Nanoscale Physics · Physics 2025-12-03 Bruno Barton-Singer , Anusree Navallur , Stavros Komineas

Skyrmions have been proposed as new information carriers in racetrack memory devices. To realise such devices, a small size; high speed of propagation; and minimal skyrmion Hall angle are required. Synthetic antiferromagnets (SAFs) present…

Mesoscale and Nanoscale Physics · Physics 2025-08-01 Christopher E. A. Barker , Charles Parton-Barr , Christopher H. Marrows , Olga Kazakova , Craig Barton

Despite significant advances in the last decade regarding the room temperature stabilization of skyrmions or their current induced dynamics, the impact of local material inhomogeneities still remains an important issue that impedes to reach…

The center of mass and helicity are two dynamic degrees of freedom of skyrmions. In this work, we study the current-driven skyrmion motion in frustrated altermagnets. Contrary to conventional wisdom, we find that the skyrmion helicity is…

Materials Science · Physics 2026-01-21 Yang Liu , Zhejunyu Jin , Jie Liu , Peng Yan

Arising from emergent electromagnetic field of magnetic skyrmions due to their nontrivial topology, the skyrmion Hall effect might be a roadblock for practical applications since any longitudinal motions of skyrmions in nanotrack is…

Mesoscale and Nanoscale Physics · Physics 2016-01-22 Xichao Zhang , Yan Zhou , Motohiko Ezawa

A magnetic bimeron is a topologically non-trivial spin texture carrying an integer topological charge, which can be regarded as the counterpart of skyrmion in easy-plane magnets. The controllable creation and manipulation of bimerons are…

Mesoscale and Nanoscale Physics · Physics 2020-01-27 Laichuan Shen , Jing Xia , Xichao Zhang , Motohiko Ezawa , Oleg A. Tretiakov , Xiaoxi Liu , Guoping Zhao , Yan Zhou

The commonly believed absence of skyrmion Hall effect for topologically trivial magnetic skyrmions is reconsidered for bilayer skyrmions in synthetic antiferromagnets driven by spin-transfer and spin-orbit torques. Using a general…

Mesoscale and Nanoscale Physics · Physics 2025-07-22 Mu-Kun Lee , Javier A. Vélez , Rubén M. Otxoa , Masahito Mochizuki

The helicity-orbital coupling is an intriguing feature of magnetic skyrmions in frustrated magnets. Here, we explore the skyrmion dynamics in a frustrated magnet based on the $J_{1}$-$J_{2}$-$J_{3}$ classical Heisenberg model explicitly by…

Mesoscale and Nanoscale Physics · Physics 2017-11-27 Xichao Zhang , Jing Xia , Yan Zhou , Xiaoxi Liu , Han Zhang , Motohiko Ezawa

We consider a twisted magnetic bilayer subject to the perpendicular electric field. The interplay of induced Dzyaloshinskii - Moriya interaction and spatially varying moir\'e exchange potential results in complex non-collinear magnetic…

Mesoscale and Nanoscale Physics · Physics 2023-08-11 Polina Shaban , Igor Lobanov , Valerii Uzdin , Ivan Iorsh

Using both atomistic and particle-based simulations, we investigate the current-driven dynamics of skyrmions on two-dimensional periodic substrates when there are multiple skyrmions per substrate minimum. At zero drive, the system forms…

Mesoscale and Nanoscale Physics · Physics 2025-04-03 J. C. Bellizotti Souza , C. J. O. Reichhardt , C. Reichhardt , N. P. Vizarim , P. A. Venegas

In this work we compute the torque field present in a ferromagnet in contact with a metallic nanowire when a skyrmion is present. If the nanowire is narrow enough the current is carried by a single conduction band. In this regime the…

Mesoscale and Nanoscale Physics · Physics 2020-10-07 Javier Osca , Bart Sorée

Current-driven magnetic skyrmions show promise as carriers of information bits in racetrack magnetic memory applications. Specifically, the utilization of skyrmions in synthetic antiferromagnetic (SAF) systems is highly attractive due to…

Mesoscale and Nanoscale Physics · Physics 2024-05-20 Dimitris Kechrakos , Mario Carpentieri , Anna Giordano , Riccardo Tomasello , Giovanni Finocchio

Magnetic skyrmions are textures behaving as quasiparticles which are topologically different from other states. Their discovery in systems with broken inversion symmetry sparked the search for materials containing such magnetic phase at…

The motion of skyrmions along ferromagnetic strips driven by current pulses is theoretically analyzed by means of micromagnetic simulations. Analytical expressions describing the skyrmion dynamics during and after the current pulse are…

Materials Science · Physics 2018-01-19 Victor Raposo , Ricardo Francisco Luis Martinez , Eduardo Martinez

Topological spin textures can be found in both two-dimensional and three-dimensional nanostructures, which are of great importance to advanced spintronic applications. Here we report the current-induced skyrmion tube dynamics in…

Mesoscale and Nanoscale Physics · Physics 2021-05-11 Jing Xia , Xichao Zhang , Kai-Yu Mak , Motohiko Ezawa , Oleg A. Tretiakov , Yan Zhou , Guoping Zhao , Xiaoxi Liu

Magnetic skyrmions are topological spin textures that appear in magnets with broken spatial inversion symmetry via competition between the (anti)ferromagnetic exchange interactions and the Dzyaloshinskii-Moriya interactions in a magnetic…

Mesoscale and Nanoscale Physics · Physics 2025-02-14 Yuto Ohki , Masahito Mochizuki
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