DocumentCode :
1039754
Title :
An experimental verification of dispersion theory in soft magnetic films
Author :
Fujii, Toshitaka ; Uchiyama, Susumu ; Tsunashima, Shigeru ; Sakaki, Yoneichiro
Author_Institution :
Nagoya University, Nagoya, Japan.
Volume :
5
Issue :
3
fYear :
1969
fDate :
9/1/1969 12:00:00 AM
Firstpage :
223
Lastpage :
226
Abstract :
The transverse bias susceptibility and the angular dispersion were measured for the purpose of testing the validity of the dispersion theory in polycrystalline ferromagnetic films. If each measurement is made on a localized small region of a sample, the field dependence of the transverse bias susceptibility ch\\it(h) agrees very well with the theoretical prediction, where h is the bias field normalized by the anisotropy field. Thus it is possible to determine the random local anisotropy K or the structure constant S of the region giving rise to the magnetization ripple. The dependence of the dispersion anisotropy productα90Kuon the structure constant S shows that the dispersion theory of Hoffmann was quite reliable. If similar experiments were performed for the whole area of each film, considerable discrepancy is found between theory and experiment in many films. This discrepancy can be interpreted as resulting from the long wavelength dispersion or the extrinsic dispersion.
Keywords :
Ferromagnetic films; Anisotropic magnetoresistance; Area measurement; Crystallization; Dispersion; Magnetic field measurement; Magnetic films; Magnetic susceptibility; Magnetization; Magnetooptic effects; Micromagnetics;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1969.1066472
Filename :
1066472
Link To Document :
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