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Author Guslienko, K. Yu. ♦ Novosad, V. ♦ Otani, Y. ♦ Shima, H. ♦ Fukamichi, K.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword MATERIALS SCIENCE ♦ MAGNETIC FIELDS ♦ MAGNETIC SUSCEPTIBILITY ♦ PERMALLOY ♦ PHYSICS ♦ THICKNESS
Abstract The evolution of a magnetic {open_quotes}vortex{close_quotes} state in submicron ferromagnetic disks has been studied as functions of disk diameter and thickness. The vortex core displacement in the applied magnetic field was calculated by minimizing the total magnetic energy consisting of the magnetostatic, exchange, and Zeeman energies. A simple analytical expression for the initial magnetic susceptibility is deduced. The initial susceptibility increases with increasing disk diameter and decreasing thickness. The calculations agree well with the experimental data obtained for the 60 nm thick permalloy disk arrays with a variable diameter from 0.2 to 0.8 {mu}m. {copyright} 2001 American Institute of Physics.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-06-11
Publisher Place United States
Journal Applied Physics Letters
Volume Number 78
Issue Number 24


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