A new mode of thermomagnetic direct overwrite with a fixed bias field

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344919· OSTI ID:6950283

Suzuki, Y; Niihara, T; Ohta, N ^[1]

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1. Central Research Laboratory, Hitachi Ltd., Kokubunji, Tokyo 185, Japan (JP)

The magneto-optical write and overwrite process on Tb{sub 24}Fe{sub 65}Co{sub 11} films with a fixed bias magnetic field was investigated using a static recording system. It was found that with increasing the write laser pulse energy the recorded domain size first increases, then decreases, and finally increases again for films thicker than 100 nm. At certain conditions domains written by irradiation with a light pulse can be annihilated by application of a light pulse with higher energy. Based on this observation a new mode of direct overwrite with fixed bias magnetic field is proposed in which domains are written with a light pulse, and erased with a pulse of larger energy.

• OSTI ID: 6950283
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
COBALT ALLOYS
DOMAIN STRUCTURE
ELECTROMAGNETIC RADIATION
FILMS
IRON ALLOYS
LASER RADIATION
MAGNETIC STORAGE DEVICES
MAGNETO-OPTICAL EFFECTS
MEMORY DEVICES
PULSES
RADIATIONS
RARE EARTH ALLOYS
TERBIUM ALLOYS