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Journal article
Asymmetry in Time Evolution of Magnetization in Magnetic Nanostructures
Scientific reports, v 5(1), pp 12301-12301
22 Jul 2015
PMID: 26198544
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Strong interest in nanomagnetism stems from the promise of high storage densities of information through control of ever smaller and smaller ensembles of spins. There is a broad consensus that the Landau-Lifshitz-Gilbert equation reliably describes the magnetization dynamics on classical phenomenological level. On the other hand, it is not so evident that the magnetization dynamics governed by this equation contains built-in asymmetry in the case of broad topology sets of symmetric total energy functional surfaces. The magnetization dynamics in such cases shows preference for one particular state from many energetically equivalent available minima. We demonstrate this behavior on a simple one-spin model which can be treated analytically. Depending on the ferromagnet geometry and material parameters, this asymmetric behavior can be robust enough to survive even at high temperatures opening simplified venues for controlling magnetic states of nanodevices in practical applications. Using micromagnetic simulations we demonstrate the asymmetry in magnetization dynamics in a real system with reduced symmetry such as Pacman-like nanodot. Exploiting the built-in asymmetry in the dynamics could lead to practical methods of preparing desired spin configurations on nanoscale.
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Details
- Title
- Asymmetry in Time Evolution of Magnetization in Magnetic Nanostructures
- Creators
- Jaroslav Tobik - Slovak Academy of SciencesVladimir Cambel - Slovak Academy of SciencesGoran Karapetrov - Drexel UniversityEnergy Frontier Research Centers (EFRC), Washington, D.C. (United States). Center for the Computational Design of Functional Layered Materials (CCDM)
- Publication Details
- Scientific reports, v 5(1), pp 12301-12301
- Publisher
- Springer Nature
- Number of pages
- 9
- Grant note
- APVV-0088-12 / Slovak Grant Agency APVV; Slovak Research and Development Agency DE-SC0012575 / Center for the Computational Design of Functional Layered Materials, an Energy Frontier Research Center - US Department of Energy, Office of Science, Basic Energy Sciences; United States Department of Energy (DOE) VEGA-2/0180/14 / VEGA agency; Vedecka grantova agentura MSVVaS SR a SAV (VEGA)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000358304900001
- Scopus ID
- 2-s2.0-84937903043
- Other Identifier
- 991019169642304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Applied