Magnetic recording apparatus and magnetic head with superconduct

Details Magnetic recording apparatus and magnetic head with superconduct Magnetic recording apparatus and magnetic head with superconduct

1990-03-19

1992-04-28

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360125, 360106, 505872, 505701, 505 1, G11B 5147, G11B 5133, G11B 555, H04B 328

Patent

active

051093120

ABSTRACT:
A magnetic recording apparatus with a magnetic head, superconductive layers formed over at least flux generating surfaces of the magnetic head and normal conductive regions of small size for passing the flux provided in the superconductive layers, over the flux generating surfaces, so as not to form a closed magnetic circuit so as to enable reversible spontaneous magnetization in a magnetic recording medium proximate thereto. The minimum unit size (recording wavelength) of the reversible spontaneous magnetization in magnetic recording of the magnetic recording medium can be reduced from the order of 1 .mu.m to that of 0.1 .mu.m. Thus it is possible to increase the surface recording density of the magnetic recording medium utilizing more than 100 Mb/in.sup.2, comparable to the density achieved by the opto-magnetic recording. This in turn makes it possible to provide a large disc apparatus having a capacity of 60 MB or more.

REFERENCES:
patent: 4907115 (1990-03-01), Ruigrok et al.
patent: 4926082 (1990-05-01), Barnes
patent: 4927804 (1990-05-01), Zieren et al.
patent: 4935403 (1990-06-01), Yamaoki et al.
patent: 4937227 (1990-06-01), Enz et al.
patent: 4971947 (1990-11-01), Barnes et al.
patent: 4979064 (1990-12-01), Mage et al.

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