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Modification of Properties of Amorphous Magnetic Materials through Chemically Active Substitution

IP.com Disclosure Number: IPCOM000082705D
Original Publication Date: 1975-Jan-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Street, GB: AUTHOR [+2]

Abstract

A GdCo composition containing 20% silicon is described. This composition has improved magnetic, thermal stability and corrosion-resistant properties.

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Modification of Properties of Amorphous Magnetic Materials through Chemically Active Substitution

A GdCo composition containing 20% silicon is described. This composition has improved magnetic, thermal stability and corrosion-resistant properties.

Bulk GdCo(2) in an amorphous state has not been possible to prepare by current techniques. It has been found that the addition of 20 atomic percent of silicon facilitates the stabilization of the amorphous state for GdCo(2). This composition was prepared by rapid cooling and was shown to be amorphous by both X-ray diffraction and transmission electron diffraction.

While 20 atomic percent provided a completely amorphous composition, the addition of 10% silicon failed to produce a completely amorphous composition.

Amorphous GdCo compositions containing silicon have improved corrosion resistance and thermal stability. The presence of silicon provides a drastic reduction in the net magnetization above liquid nitrogen temperatures.

Silicon provides an alternative to molybdenum and gold as an additive means of tailoring the magnetization of films of amorphous materials.

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