Control of the permeability loss-peak frequency of Ni81Fe19 thin films through laser ablation of triangular and square cluster geometries

Laser ablation arrays of triangular and square shaped clusters, comprised of 23 micrometers diam circular holes, are defined upon 100 nm thick Ni81Fe19 films used to control the rf permeability spectra. Cluster-to-cluster spacing is varied from 200 to 600 micrometers. For each geometry it is found t...

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Bibliographic Details
Published inJournal of applied physics Vol. 87; no. 9 Pt 2; p. 5254
Main Authors Grimes, C A, Lumpp, J K
Format Journal Article
LanguageEnglish
Published United States 01.05.2000
Subjects
Environmental Monitoring - instrumentation
Iron - chemistry
Lasers
Magnetics
Nickel - chemistry
Permeability
NASA Discipline Life Sciences Technologies
Non-NASA Center
Online AccessGet more information

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Summary:Laser ablation arrays of triangular and square shaped clusters, comprised of 23 micrometers diam circular holes, are defined upon 100 nm thick Ni81Fe19 films used to control the rf permeability spectra. Cluster-to-cluster spacing is varied from 200 to 600 micrometers. For each geometry it is found that the loss peak frequency and permeability magnitude shift lower, in a step-wise fashion, at a cluster-to-cluster spacing between 275 and 300 micrometers. The nonlinear shift in the behavior of the permeability spectra correlates with a dramatic increase in domain wall density.
ISSN:0021-8979
DOI:10.1063/1.373312