Journal ArticleDOI
The Product Engineer and the Magnetic Thin Film
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Magnetic thin films have great potential as memory elements in digital computers The properties of thin films are such that memories can be operated at speeds of the order of 100 nanoseconds or less, non-destructively in certain instances.Abstract:
Magnetic thin films have great potential as memory elements in digital computers The properties of thin films are such that memories can be operated at speeds of the order of 100 nanoseconds or less, non-destructively in certain instances While the elements themselves show great promise, there are many problems attendant to their use, the solution of which must dome from experts in packaging techniquesread more
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Journal ArticleDOI
Anisotropy in Permalloy Films
TL;DR: In this paper, three principal effects have been identified as contributing to this anisotropy, namely, formation of directed Fe pairs in the Ni matrix, an effect due to the angle-of-incidence between the substrate and the depositing beam, and anisotropic stress in combination with the isotropic magnetostriction.
Journal ArticleDOI
Flux Reversal in Thin Films of 82% Ni, 18% Fe
C. D. Olson,A. V. Pohm +1 more
TL;DR: The magnetization reversal process of iron-nickel films (nominally 82% Ni−18% Fe) deposited in the presence of a magnetic field to a thickness of about 1000 A to 4000 A have been examined by the application of appropriate fields.
Journal ArticleDOI
The Permalloy Problem
TL;DR: In this paper, the effect of cooling rate on magnetostriction was found to be substantial only in the composition range 70 to 80 percent nickel, where the magnetic crystal anisotropy is very small (75 percent nickel in quenched alloys).
Journal ArticleDOI
Domain walls in thin Ni-Fe films
TL;DR: Observations of domain walls in Ni-Fe films as a function of thickness demonstrate the strong influence of magnetic stray fields on the wall structure, hence on the coercivity for wall motion.
Journal ArticleDOI
Magnetic domain patterns on thin films
H. J. Williams,R. C. Sherwood +1 more
Abstract: Magnetic domain patterns have been observed on evaporated films of iron, cobalt, nickel, and several different alloys of these elements. The films were deposited in the presence of a magnetic field to establish a uniaxial direction of easy magnetization. It was found that the direction of easy magnetization, in films of all compositions, could be changed by re‐heat‐treating them in a magnetic field with a new orientation. This is of special interest because bulk specimens of the elements do not respond to heat treatment in a magnetic field. Nucleation and growth of domains were observed for fields applied at various angles to the uniaxial direction of easy magnetization in some of the films. Patterns were obtained on films ranging in thickness from approximately 50 A to 12 000 A. Domain walls in films ranging from 50 A to 500 A in thickness tend to aggregate in pairs.