Overwrite on Sputtered Garnet Media Using Magnetic Field Modulation
- 1 February 1992
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 31 (2S) , 431-434
- https://doi.org/10.1143/jjap.31.431
Abstract
Both a pregroove and aftergroove were formed in a garnet medium on a GGG substrate, and a reliable 785-nm laser diode tracking servo produced. Magnetic field modulation recording for the pregrooved media produced a carrier to noise ratio (CNR) of 48 dB, and overwriting gave complete erasure. Writing was impossible in the off-track zone of the aftergrooved media, which we believe will be useful in improving the overwrite power margin. There is a problem of deterioration of coercivity, caused by wet etching during fabrication of the aftergroove, which remains to be solved.Keywords
This publication has 3 references indexed in Scilit:
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- Generation of 41 mW of blue radiation by frequency doubling of a GaAlAs diode laserApplied Physics Letters, 1990
- Optimized structure of sputtered garnet disksIEEE Transactions on Magnetics, 1989