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…
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.
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.
Source code of slasi module for simulations consists of the next files: alltypes.h: definition of structures and global variables used in all another files. clargs.c/clargs.h: processing of command-line arguments. constants.h: some constants. fields.c/fields.h: functions for magnetic field processing: initialization (reducing field parameters) and calculation of field for given time and…
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…
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…
Authors: Jean-Guy Caputo, Yuri Gaididei, Franz G. Mertens, Denis D. Sheka, Publication: Phys. Rev. Lett. 98, 056604 (2007), 10.1103/PhysRevLett.98.056604 Comments: 4 pages, 3 figures arXiv: http://arxiv.org/abs/cond-mat/0607362 The spin-transfer effect is investigated for the vortex state of a magnetic nanodot. A spin current is shown to act similarly to an effective magnetic field…