Periodic magnetic structures generated by spin-polarized currents in nanostripes

We investigated the influence of a spin-polarized current on long ferromagnetic nanostripes. The magnetization behavior is analyzed for all range of the applied currents, up to the saturation. It is shown that the saturation current is a nonmonotonic function of the stripe width. For a stripe width increasing it approaches…

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Regular and chaotic vortex core reversal by a resonant perpendicular magnetic field

We predict the regular and chaotic dynamics of the vortex polarity under the action of perpendicular ac magnetic field and propose a simple analytical description in terms of a reduced vortex core model. Phys. Rev. B, 88, 014432 (2013), 10.1103/PhysRevB.88.014432, PDF.

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The results of scientific workshop: Spin-polarized current and spin-transfer torque

According to the results of the scientific workshop I want to publish final presentation and put it to the free access, you can find it by the link: Download

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Magnetic vortex-antivortex crystals generated by spin-polarized current

We study vortex pattern formation in thin ferromagnetic films under the action of strong spin-polarized currents. Considering the currents which are polarized along the normal of the film plane, we determine the critical current above which the film goes to a saturated state with all magnetic moments being perpendicular to…

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Bloch Point Structure in a Magnetic Nanosphere

We classify possible types of Bloch points and analytically derive the shape of the magnetization distribution for different Bloch points. Phys. Rev. B 85, 224401 (2012), 10.1103/PhysRevB.85.224401, PDF. Supplementary materials.

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Out-of-surface vortices in spherical shells

We show that the curvature of the underlying surface leads to a coupling between the localized out-of-surface component of the vortex with its delocalized in-surface structure, i.e., polarity-chirality coupling. Phys. Rev. B 85, 144433 (2012), 10.1103/PhysRevB.85.144433, PDF.

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Bloch Point Structure in a Magnetic Nanosphere

Authors: Oleksandr V. Pylypovskyi, Denis D. Sheka, Yuri Gaididei Publication: Phys. Rev. B 85, 224401 (2012), 10.1103/PhysRevB.85.224401 Comments: 8 pages, 7 figures arXiv: http://arxiv.org/abs/1112.2413 The micromagnetic singularity, the so–called Bloch point, can form a metastable state in the nanosphere. We classify possible types of Bloch points and derive analytically the…

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Controlled vortex core switching in a magnetic nanodisk by a rotating field

Authors: Volodymyr P. Kravchuk, Denis D. Sheka, Yuri Gaididei, Franz G. Mertens Publication: J. Appl. Phys. 101, 043908 (2007), 10.1063/1.2770819 Comments: 5 pages, 5 figures arXiv: http://arxiv.org/abs/0705.2046 The switching process of the vortex core in a Permalloy nanodisk affected by a rotating magnetic field is studied theoretically. A detailed description of magnetization…

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