Journal article
The influence of shape anisotropy on vortex nucleation in Pacman-like nanomagnets
Journal of magnetism and magnetic materials, v 336, pp 29-36
01 Jun 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this paper we explore magnetic properties of Permalloy Pacman-like (PL) nanomagnets in external in-plain magnetic field. PL nanomagnets represent unique magnetic systems with broken symmetry, which are perspective as non-volatile memory elements. In these nanomagnets both bits, chirality and polarity of a single vortex state, can be easily read and written by in-plane magnetic field only. In the experimental part of this work we show that namely chirality of the similar to 1-mu m large PL nanomagnet can be red easily by magnetic force microscopy method. The easy bit reading is enabled due to coupling of the polarity magnetization vector to the magnetic charges located at the surface of the PL missing sector. Using micromagnetic simulations we show the influence of spatial anisotropy on vortex nucleation and annihilation fields in the PL nanomagnets. Angular dependence of the vortex nucleation field is analysed in detail for PL nanomagnets of different diameter, thickness, and missing-sector dimensions. Best control of the ground state can be achieved for diameters not exceeding 100 nm, thicknesses from 40 to 45 nm, and for the missing sector angles from 30 to 60 degrees. (C) 2013 Elsevier B.V. All rights reserved.
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Details
- Title
- The influence of shape anisotropy on vortex nucleation in Pacman-like nanomagnets
- Creators
- V. Cambel - Slovak Academy of SciencesJ. Tobik - Slovak Academy of SciencesJ. Soltys - Slovak Academy of SciencesJ. Fedor - Slovak Academy of SciencesM. Precner - Slovak Academy of SciencesS. Gazi - Slovak Academy of SciencesG. Karapetrov - Drexel University
- Publication Details
- Journal of magnetism and magnetic materials, v 336, pp 29-36
- Publisher
- Elsevier
- Number of pages
- 8
- Grant note
- project "Development of HD Video Platform for Applications in Broadcasting, Education and Research", Research 82 Development Operational Program 26240120041 / ERDF, ITMS 2/0037/12 / VEGA; Vedecka grantova agentura MSVVaS SR a SAV (VEGA); European Commission
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000316732400006
- Scopus ID
- 2-s2.0-84875415652
- Other Identifier
- 991019168020204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Condensed Matter