Abstract
A brief review is given of results of investigations dealing with the magnetic properties of amorphous alloys and intermetallic compounds based on Co or Fe. Additional results of magnetic measurements are presented for Co 2Si and for several amorphous alloys and intermetallic compounds in the systems Zr-Co, Ti-Co and Th-Co. In the Zr-Co system the magnetic properties of amorphous alloys obtained by means of coevaporation of the elements are compared with those obtained by means of melt-spinning. A model proposed earlier for explaining magnetic properties in amorphous alloys has been extended to show that in cases where normal 3d band magnetism prevails, the amorphous state is likely to have larger values for the 3d moments than the crystalline state. The opposite holds true in cases where the magnetic properties are largely determined by superexchange.
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