Title :
Evaporated amorphous GdCo-films with perpendicular anisotrophy by controlled oxygen contamination
Author :
Brunsch, A. ; Schneider, J.
Author_Institution :
IBM Germany, Sindelfingen.
fDate :
9/1/1977 12:00:00 AM
Abstract :
Vacuum deposited amorphous GdCo-films with strong perpendicular magnetic anisotropy were prepared by thermal evaporation of the constituents at an oxygen pressure during film fabrication between 2.5 × 10-8Torr and 2 × 10-7Torr. Ku-values above +2.3×105erg/cm3at 4 ±Ms= 1000 Gauss were obtained in this pressure range. The coercivity of films with 4 ±Ms= 1000 Gauss increases from 15 Oe at 2.5 × 10-8Torr to 150 Oe at 1.5 × 10-7Torr O2. In this paper the fabrication technique of these films is described and the measured magnetic and physical properties are reported and discussed. A model to explain the origin of the perpendicular anisotropy is proposed.
Keywords :
Amorphous magnetic films/devices; Magnetic anisotropy; Magnetic bubble films; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Coercive force; Contamination; Fabrication; Gaussian processes; Magnetic films; Perpendicular magnetic anisotropy; Pollution measurement;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1977.1059621