Browse Prior Art Database

Incorporating Hydrogen in Bubble Domain Film

IP.com Disclosure Number: IPCOM000086991D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Cuomo, JJ: AUTHOR [+2]

Abstract

Hydrogen incorporation in amorphous magnetic films is used to decrease the anisotropy field H(K), increase the magnetization, and decrease the compensation temperature. Additionally, the anisotropy energy K(U) is decreased.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 61% of the total text.

Page 1 of 2

Incorporating Hydrogen in Bubble Domain Film

Hydrogen incorporation in amorphous magnetic films is used to decrease the anisotropy field H(K), increase the magnetization, and decrease the compensation temperature. Additionally, the anisotropy energy K(U) is decreased.

Hydrogen is incorporated into selected areas of the amorphous magnetic film by first overcoating the magnetic film with a masking layer such as SiO(2). The masking layer is then patterned and etched to expose the underlying amorphous magnetic film in selected regions which are to be doped. The exposed surfaces of the amorphous film are then electrolytically etched, and hydrogen is cathodically evolved at the surface of the film in order to incorporate it into the bubble film. The hydrogen-doped regions are then overcoated with a hydrogen barrier material, such as electrodeposited gold or additional SiO(2).

The amount of hydrogen incorporated by this technique can be controlled by varying the electrode voltage and the deposition time. As an example, a Gd-Co- Mo amorphous magnetic film was masked leaving windows about 1-2 millimeters in area. The exposed amorphous film surfaces in these window areas were electroplated with palladium by brush plating with a voltage of 6 volts negative on the amorphous film with respect to a graphite counter electrode, using a commercial plating solution. The hydrogen liberated at the surface of the electrodeposited palladium passed through the palladium film and into t...