Magnetic recording medium and method for magnetic recording and

Details Magnetic recording medium and method for magnetic recording and Magnetic recording medium and method for magnetic recording and

1988-04-08

1991-01-01

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Record medium

Tape

360 59, G11B 578, G11B 502

Patent

active

049823027

ABSTRACT:
A method for magnetic recording and reproduction comprising the steps of: (1) magnetically multiple-recording signals on a magnetic recording medium comprising a support having thereon an upper magnetic recording layer comprising barium ferrite having an increased coercive force at 60.degree. C. or more and a lower magnetic recording layer comprising at least one of chromium dioxide and Co-modified iron oxide, having a decreased coercive force at 60.degree. C. or more, disposed between said upper magnetic recording layer and said support; (2) heating said magnetic recording layers prior to reproduction due to a reproducing head; and (3) reproducing said magnetically recorded signal from said heated magnetic recording medium which is multiple-recorded.

REFERENCES:
patent: 4340914 (1982-07-01), Hanaoka
patent: 4712203 (1987-12-01), Saito et al.

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