Multilayered Magneto-Optical Disks for Magnetically Induced Superresolution
- 1 February 1992
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 31 (2S) , 568-575
- https://doi.org/10.1143/jjap.31.568
Abstract
Magnetically induced superresolution (MSR) has been realized in magneto-optical disks using exchange-coupled magnetic multilayer film. Two new detection methods have been developed. In front aperture detection (FAD), the heated area in the light spot is optically masked. In rear aperture detection (RAD), a signal is read out only from the heated area. For higher readout power in RAD, the aperture area is sandwiched by double masks, since another mask is generated in the highest temperature region. The cut-off spatial frequency in both types of detection is more than two times higher than that in conventional detection. A high C/N of 42 dB is obtained in the MSR disks by both methods for a mark length of 0.3 µm.Keywords
This publication has 1 reference indexed in Scilit:
- Magnetization Process of Exchange-Coupled Ferrimagnetic Double-Layered FilmsJapanese Journal of Applied Physics, 1981