Micromagnetics of laminated Permalloy films

The edge curling wall (ECW) is observed in an optical Kerr microscope. Conditions are derived energetically favoring single transverse domains with ECWs over other multiple closure domains or single longitudinal domains that are undesirable because of their low permeability. Computed figures illustr...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on magnetics Vol. 24; no. 3; pp. 2045 - 2054
Main Authors Slonczewski, J.C., Petek, B., Argyle, B.E.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.05.1988
Institute of Electrical and Electronics Engineers
Subjects
Analysing. Testing. Standards
Anisotropic magnetoresistance
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Geometrical optics
Magnetic domains
Magnetic properties and materials
Magnetic properties of surface, thin films and multilayers
Magnetostriction
Materials science
Measurement of properties and materials state
Metals, semimetals and alloys
Metals. Metallurgy
Micromagnetics
Nondestructive testing
Optical films
Optical microscopy
Permeability
Physics
Specific materials
Stress
Strips
Thickness
Micromagnetism
Optical microscopy
Magnetic domains
Magnetic domain
Kerr magnetooptical effect
Bloch wall
Néel wall
Thin film
Online AccessGet full text

Cover

More Information
Summary:The edge curling wall (ECW) is observed in an optical Kerr microscope. Conditions are derived energetically favoring single transverse domains with ECWs over other multiple closure domains or single longitudinal domains that are undesirable because of their low permeability. Computed figures illustrate how the maximum permissible spacer thickness depends on Permalloy sublayer thickness, uniaxial anisotropy, width of the magnetic strip, mismatch of Permalloy thickness, and perpendicular anisotropy. The case with strip width W=100 mu m and vanishing magnetostriction or stress should require only a few sublayers. However, if W is very small, or if stress-induced or some other form of perpendicular anisotropy is excessive, then attainment of single transversely magnetized domains requires many sublayers. Some of these conclusions are supported by microscopic observations.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/20.3399