Some Recent Developments in Magnetic Alloys

The magnetic properties and use of some conventional and new alloys are discussed. The control which can be exercised on the switching properties by varying composition and treatment is indicated and a very fast switching alloy described. The abnormally low permeability of very thin strip is explained; it can be avoided by keeping material and furnace atmosphere pure. The latest aluminum-iron and cobalt-iron alloys, and permanent magnets, are briefly described.