NDLI: Nonequilibrium magnetic domain configurations assisted by thermally excited magnons

Content Provider	IEEE Xplore Digital Library
Author	Choi, B.C. Arnup, G. Freeman, M.R.
Copyright Year	2005
Description	Author affiliation: Dept. of Phys. & Astron., Victoria Univ., Canada (Choi, B.C.)
Abstract	Dynamic behavior in the evolving structure of domains in mesoscopic ferromagnets (Ni/sub 80/Fe/sub 20/) undergoing ultrafast magnetization reversal is studied with scanning Kerr microscope and micromagnetic modeling based on Landau-Liftshitz-Gilbert equation. A faint branchlike fine structure is observed in the initial state of the magnetization reversal. Micromagnetic simulation at 300 K reveals that complex domain structures evolve out of these fine structures, in agreement with the experimental observations. This result implies that thermally excited magnons at finite temperatures are effectively involved in the formation of complex nonequilibrium domain structures. Furthermore, the speed at which the magnetization reversal is driven by switching fields is found to play an essential role in determining these dynamic domain patterns.
Sponsorship	Magnetics Soc. of Japan Magnetics Soc. of the IEEE
Starting Page	203
Ending Page	204
File Size	162504
Page Count	2
File Format	PDF
ISBN	0780390091
DOI	10.1109/INTMAG.2005.1463530
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-04
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic domains Magnetization reversal Micromagnetics Temperature Magnetic field measurement Physics Magnetic force microscopy Transistors Electron beams Lithography
Content Type	Text
Resource Type	Article

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