Low Temperature Physics: 34, 528 (2008); https://doi.org/10.1063/1.2957013 (7 pages)
Физика Низких Температур: Том 34, Выпуск 7 (Июль 2008), c. 669-676    ( к оглавлению , назад )

Switching phenomena in magnetic vortex dynamics

Yuri B. Gaididei1, Volodymyr P. Kravchuk2, Franz G. Mertens3, and Denis D. Sheka2

1Institute for Theoretical Physics, Kiev 03680, Ukraine

2National Taras Shevchenko University of Kiev, Kiev 03127, Ukraine

3Physics Institute, University of Bayreuth, Bayreuth 95440, Germany
E-mail: denis_sheka@univ.kiev.ua

Received January 28, 2008


Amagnetic nanoparticle in a vortex state is a promising candidate for the information storage. One bit of information corresponds to the upward or downward magnetization of the vortex core (vortex polarity). Generic properties of the vortex polarity switching are insensitive of the way how the vortex dynamics was excited: by an ac magnetic field, or by an electrical current. We study theoretically the switching process and describe in detail its mechanism, which involves the creation and annihilation of an intermediate vortex- antivortex pair.

PACS: 75.10.Hk Classical spin models;
PACS: 75.70.Ak Magnetic properties of monolayers and thin films;
PACS: 75.40.Mg Numerical simulation studies;
PACS: 05.45.–a Nonlinear dynamics and nonlinear dynamical systems.

Ключевые слова: magnetic nanoparticle, vortex state, switching phenomena.