Cobalt-titanium substituted barium ferrite films for magneto-optical memory
- 15 April 1987
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 61 (8) , 3346-3348
- https://doi.org/10.1063/1.338972
Abstract
We have studied Faraday rotation and magnetic properties of Co-Ti substituted barium ferrite films with perpendicular anisotropy, which were prepared by targets-facing-type sputtering method on (111) oriented GGG substrates. Faraday rotation (θF) of 500–830 nm was measured by using the Faraday modulation method. It was found that θF increased proportionally to the content of cobalt in the wavelength range 700–830 nm. In the BaFe10.42Co0.78Ti0.8O19 film, Faraday rotation and magnetic properties were as follows: θF=0.75 deg/μm at 780 nm, anisotropy field: Hk=5.2 kOe, coercive force: Hc=800 Oe, Curie temperature: TC=380 °C. Thermomagnetic recording was achieved on this film by using a 780-nm laser diode. As a result, 2.0-μm bit patterns were observed by Faraday effect.This publication has 1 reference indexed in Scilit:
- Magneto-optical effects of aluminum and ferrous substituted cobalt ferriteJournal of Applied Physics, 1982