Abstract

Nonstoichiometric FexO1−x and FexMyO1−x−y films, where M is either a nonmagnetic element, e.g., Si, or a magnetic element, e.g., Co, were prepared by sputter deposition. They showed increasing ferromagnetic magnetization with decreasing oxygen concentration below 1−x−y<0.5, and strong perpendicular magnetic anisotropy which overwhelmed the shape anisotropy of the thin ferromagnetic films in certain composition ranges. The magnetization of perpendicular magnetic films attained more than 500 emu/cm3 with an anisotropy energy of 2×106 erg/cm3. Ferromagnetic amorphous metallic phases precipitated between columnar structure of nonmagnetic oxide phase were considered to be responsible for the ferromagnetism of these films. The perpendicular anisotropy was also interpreted by the internal shape effect arising from fine elongated ferromagnetic phases distributed in a nonmagnetic phase with their long axis perpendicular to the film plane. They had an appropriate coercivity for the perpendicular magnetic recording media with a high resistance against wear and corrosion and a low friction constant.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.