The magnetic properties of Co-Ni-Fe films

Author

LamPert, R.E. ; Gorres, J.M. ; Hanson, M.M.

Author_Institution

Univac, Division of the Sperry Rand Corporation, St. Paul, Minn

Volume

4

Issue

3

fYear

1968

fDate

9/1/1968 12:00:00 AM

Firstpage

525

Lastpage

528

Abstract

$H_{k} , \\delta H_{k} ,\\alpha _{90}$ and Hchave been measured for vapor-deposited nonmagnetostrictive Co-Ni-Fe films, 1500 Å thick. All parameters except Hchave been measured using the transverse-biased permeability apparatus. Hkincreases linearly with cobalt melt content up to 15-percent cobalt, $\\delta H_{k}$ and Hcincrease with increasing cobalt and substrate temperature. α90decreases in the region 0-15-percent cobalt and then increases with increased cobalt melt content and substrate temperature. The coefficient of magnetoelastic composition sensitivity $S$ is the slope of the curve η versus the ratio of nickel to iron in the melt for a constant cobalt percentage about the point $\\eta = 0$ . The value of $S$ increases rapidly with substrate temperature to a maximum near 300°C if the cobalt percentage is small. For larger amounts of cobalt $S$ is reduced and is more independent of temperature. It is proposed that the volume fraction and the mobility of the grain boundaries in the film structure are primarily responsible for $S$ .

Keywords

Cobalt-nickel-iron films; Iron-nickel-cobalt films; Magnetostriction; Cobalt; Iron; Magnetic films; Magnetic properties; Nickel; Permeability measurement; Substrates; Temperature sensors; Thickness measurement; Time of arrival estimation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1968.1066292

Filename

1066292