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US 4,060,798 AGranted
Method for increasing the critical velocity of magnetic bubble propagation in magnetic materials
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsErnst Fritz Rudolf August Schloemann, Harry Jerrold Van Hook
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Abstract
The critical velocity at which magnetic bubbles can propagate within a matic material is increased by establishing an easy axis of magnetization within the material. This axis is either growth-induced or strain-induced. In one embodiment, the material has a curvature imparted to it which places it under a uniaxial strain and this induces the magnetic easy axis.
Claims2
Apparatus for use in magnetic bubble devices so as to increase the frequency at which said bubble devices can operate, comprising in combination
- a substrate;
- a magnetic film formed on one surface of said substrate, the composition of said magnetic film being such that magnetic bubbles may be created and propagated therein;
- and
- means for maintaining within said magnetic film a uniaxial strain-induced, in-plane, easy axis of magnetization.
1 more element
Dependencies are inferred from the claim text.