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Production of Regular Bubble Domain Lattices

IP.com Disclosure Number: IPCOM000083984D
Original Publication Date: 1975-Aug-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Cuomo, JJ: AUTHOR

Abstract

Bubbles can spontaneously nucleate in bubble domain materials in a random way to produce amorphous bubble patterns. However, bubble lattice systems require regular lattices which have uniform lattice spacing throughout.

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Production of Regular Bubble Domain Lattices

Bubbles can spontaneously nucleate in bubble domain materials in a random way to produce amorphous bubble patterns. However, bubble lattice systems require regular lattices which have uniform lattice spacing throughout.

The present technique is used to zone refine an amorphous bubble domain lattice, in order to produce a regular lattice. As shown, an in-plane magnetic layer is located adjacent to the bubble domain layer. In-plane domains are moved in the in-plane layer and interact with bubble domains in the lattice. This produces a "zone refinement", in which a zone moves across the amorphous lattice and makes it more regular by removing lattice defects.

The structure can be provided by deposition of a uniaxial bubble material having perpendicular anisotropy on an in-plane material or vice versa, or by using an overlag of an in-plane material on the bubble material. In particular, amorphous Gd-Co alloys can be thermally oxidized to produce an in-plane layer, or ion implantation in the upper layer of the bubble domain material can be used to produce the in-plane layer.

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