A magnetic head comprising a magnetic film in at least a part of a magnetic circuit, at least a part of the magnetic film being formed in contact with, or being exposed to, an oxide or oxygen at least in a heating step at 150.degree. C. or higher in a process for preparing the magnetic head is disclosed....http://www.google.fr/patents/US4766039?utm_source=gb-gplus-shareBrevet US4766039 - Magnetic head made from amorphous magnetic film
