Magnetic head for magneto-optical recording and magneto-optical

Details Magnetic head for magneto-optical recording and magneto-optical Magnetic head for magneto-optical recording and magneto-optical

1995-08-23

1997-11-18

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 59, G11B 1100

Patent

active

056894783

ABSTRACT:
A magnetic head for magneto-optical recording includes a slider sliding on a magneto-optical recording medium, a core made of a magnetic material and mounted to the slider, and a coil wound around the core. The core has an area of a main magnetic pole end face of from 0.01 mm.sup.2 to 0.039 mm.sup.2. The magnetic material for the core is a Mn--Zn ferrite having a Curie temperature of not less than 140.degree. C., a permeability of not less than 200 at frequency 8 MHz at temperature 25.degree. C., and an effective saturation magnetic flux density of not less than 4400 G. A magneto-optical recording apparatus includes an optical head for irradiating a magneto-optical recording medium with a light spot, and a magnetic head for applying a magnetic field to the magneto-optical recording medium. The magnetic head includes a slider sliding on the magneto-optical recording medium, a core made of a magnetic material and mounted to the slider, and a coil wound around the core. Upon application of a voltage to the coil a modulation magnetic field is applied to a recording surface of the magneto-optical recording medium to record an information signal with a maximum frequency of not less than about 8 MHz.

REFERENCES:
patent: 4796241 (1989-01-01), Hayakawa et al.
patent: 5107471 (1992-04-01), Miyake et al.
patent: 5138567 (1992-08-01), Mehrgardt
patent: 5485435 (1996-01-01), Matsuda et al.
Patent Abstracts of Japan, Kokai No. 04-82065, vol. 16, No. 305, Jul. 1992.
Patent Abstracts of Japan, Kokai No. 04-119503, vol. 16, No. 377, Aug. 1992.
Patent Abstracts of Japan, Kokai No. 01-236412, vol. 13, No. 566, Dec. 1989 .

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