DocumentCode
1046064
Title
The permeability-frequency response of 4-79 molybdenum permalloy foils
Author
Thornley, Richard F M ; Kehr, William D.
Author_Institution
IBM Corporation, Boulder, Colo.
Volume
7
Issue
3
fYear
1971
fDate
9/1/1971 12:00:00 AM
Firstpage
672
Lastpage
674
Abstract
Foils of 4-79 molybdenum Permalloy have been measured for permeability-frequency characteristics as a function of heat treatment and foil thickness for frequencies up to 30 MHz. The slope of the permeability-frequency curve was found to be -0.7 instead of the -0.5 expected from classical theory. The low-frequency permeability of foils thinner than 0.5 mil decreases rapidly with decreasing thickness. This decrease may be connected with changes in texture, surface roughness, or grain size, all of which were observed.
Keywords
Magnetic recording heads; Molybdenum Permalloy foils; Permalloy foils; Annealing; Frequency measurement; Furnaces; Heat treatment; Lamination; Magnetic circuits; Permeability measurement; Rough surfaces; Surface roughness; Thickness measurement;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1971.1067049
Filename
1067049
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