High-density magnetic recording and reproducing head

Details High-density magnetic recording and reproducing head High-density magnetic recording and reproducing head

1992-03-09

1994-07-19

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

360111, G11B 5127

Patent

active

053314913

ABSTRACT:
A magnetic recording and reproducing head records a signal from and reproduces a signal from a magnetic recording medium having a perpendicularly magnetizable film. The magnetic recording and reproducing head includes a magnetic sensing section comprising a slender needle of a soft magnetic material, and an exciting coil wound around the slender needle for magnetizing the slender needle to record a signal on the magnetic recording medium. To reproduced the recorded signal, high-frequency electric energy is applied to the magnetic sensing section to produce a reflected wave, and a change in the reflected wave caused by a leakage magnetic field produced by a signal recorded on the magnetic recording medium is detected as representing the recorded signal.

REFERENCES:
patent: 4091429 (1978-05-01), Ate de Jouge et al.
patent: 4464691 (1984-08-01), Sawazaki et al.
patent: 4530016 (1985-07-01), Sawazaki
patent: 4575777 (1986-03-01), Hosokawa
patent: 4677512 (1987-06-01), Akiyama et al.

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