Magnetic head having a core portion of polycrystalline MnZn ferr

Details Magnetic head having a core portion of polycrystalline MnZn ferr Magnetic head having a core portion of polycrystalline MnZn ferr

1995-06-16

2000-07-11

Davis, David

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5127

Patent

active

060881984

ABSTRACT:
Magnetic heads comprising at least one core portion of polycrystalline MnZn-ferroferrite material exhibit a very low so-called "rubbing noise" level if the average grain size of the material ranges between 0.2 and 3.0 micrometers. The rubbing noise level of these heads is even lower than the electronic noise level if the average grain size of the material ranges between 0.5 and 2.0 micrometers. By virtue thereof, the heads can very suitably be used in the frequency range from 5 to 100 MHz.

REFERENCES:
patent: 4285894 (1981-08-01), Watanabe et al.
patent: 4521323 (1985-06-01), Hirota et al.
patent: 4568993 (1986-02-01), Stoppers et al.
patent: 4734802 (1988-03-01), Higuchi et al.
patent: 4796127 (1989-01-01), Wada et al.
patent: 4841400 (1989-06-01), Matsuzawa
patent: 5049454 (1991-09-01), Johnson et al.
Mee, C. Denis & Daniel, Eric D.; Magnetic Recording Handbook; 1990; p. 294.

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