NDLI: Simulation of Magnetization Reversal and Domain-Wall Trapping in Submicron Permalloy Wires With Different Wire Geometries

Content Provider	IEEE Xplore Digital Library
Author	Varga, E. Csaba, G. Imre, A. Porod, W.
Copyright Year	2002
Abstract	Nonvolatile data storage in today's computers is based on magnetic materials. Hard disk drives (HDD) feature ferromagnetic thin films for recording bits as regions with different magnetizations in the film. At present, the efforts of decreasing HDD size while increasing storage capacity, however, face fundamental limits, namely, the so-called superparamagnetic effect. Research into new generations of magnetic data-storage devices, amongst others, considers as its basic working principle current-induced magnetic domain-wall motion (CIDWM) in magnetic nanowires. In this paper, we present simulation studies of external magnetic field-induced magnetization reversal and domain-wall motion in nanowires of various sizes and shapes. Our results contribute to the basic design principles applied to magnetic structures used in CIDWM experiments. Parameters, such as wire thickness and wire-pad geometries are investigated, and important threshold magnetic field values are presented. In addition, we introduce a novel method of domain-wall trapping in a magnetic wire using the fringe fields of close-by magnets.
Sponsorship	IEEE Nanotechnology Council
Starting Page	682
Ending Page	686
Page Count	5
File Size	451503
File Format	PDF
ISSN	1536125X
Volume Number	11
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wires Magnetic domains Magnetic domain walls Switches Shape Magnetic fields Geometry simulation work with OOMMF Domain-wall trapping magnetic wires nanomagnetics shape study
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Electrical and Electronic Engineering Computer Science Applications

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