Slow magnetization dynamics of small permalloy islands

dc.contributor.authorKoo, H.
dc.contributor.authorLuu, T. V.
dc.contributor.authorGomez, R. D.
dc.contributor.authorMetlushko, V. V.
dc.description.abstractThe conditions that lead to specific domain configurations and the associated switching characteristics of small permalloy islands were studied by using magnetic force microscopy. By measuring a large number of particles, it was established that islands that have nonzero remanent moments ~nonsolenoidal! exist in one of three distinct configurations, namely: ~a! true single domain, ~b! quasisingle domain with edge closure patterns, and ~c! multidomain with nonuniform internal magnetization. The configuration depended upon the island width as well as the aspect ratio. Islands that are 310 nm wide or less are true single domain particles at low aspect ratios (;1.87) and higher, while islands wider than 500 nm always exhibited edge closure domains even for very large aspect ratios. In the range between 310 and 500 nm, the onset of single domain behavior was a function of the aspect ratio and thickness. Our studies involving in situ applied field similarly revealed the mechanisms of the reversal processes for each of the configurations, which correlated quite well with the values of the switching fields.en
dc.format.extent364793 bytes
dc.identifier.citationH.C. Koo, T.V. Luu, V. Metlushko and R.D. Gomez, “Slow magnetization dynamics of small Permalloy islands” Journal of Applied Physics 87 (8), 5114-5116 (2000).en
dc.publisherAmerican Institute of Physicsen
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtElectrical & Computer Engineeringen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.rights.licenseCopyright 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article may be found at
dc.subjectmagnetic force microscopyen
dc.subjectaspect ratioen
dc.titleSlow magnetization dynamics of small permalloy islandsen


Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
356.24 KB
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
1.8 KB
Item-specific license agreed upon to submission