Thin-film permanent magnet and method of producing the same

摘要

A thin-film permanent magnet which is made of a Co - Pt alloy containing 5-35 atomic-% of Pt. This thin-film permanent magnet can be readily produced by a sputtering method in which the ultimate pressure before the introduction of a sputtering gas is made 5x10-7-1x10-4 Torr. Without any heat treatment, it has a coercivity of 2,000 Oe at the maximum and a remanence of about 8,000-about 18,000 G.