Title :
Bias susceptibility measurements in thin permalloy films
Author :
Comstock, C.S., Jr. ; Sharp, A.C. ; Samuels, Robert L. ; Pohm, Arthur V.
Author_Institution :
Iowa State University, Ames, IA, USA
fDate :
3/1/1968 12:00:00 AM
Abstract :
Susceptibility measurements at 5000 Hz have been performed in the easy and hard directions on two 80-20 Permalloy films (1000 Å, 1 cm in diameter) cut from large samples. The experimental results agree with the predictions of the Hoffmann theory. The susceptibility parallel to the average direction of

is found to be proportional to

or

when the net field is large enough to prevent blocking.
Keywords :
Magnetic measurements; Magnetization processes; Permalloy films; Coercive force; Earth; Frequency; Magnetic field measurement; Magnetic susceptibility; Magnetization; Performance evaluation; Perpendicular magnetic recording; Physics; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1968.1066170