Floating magnetic head with reduced magnetostriction vibration n

Details Floating magnetic head with reduced magnetostriction vibration n Floating magnetic head with reduced magnetostriction vibration n

1994-05-11

1996-11-19

Resan, Stevan A.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360122, 360125, 360126, 360127, 428692, 428900, 252 6256, G11B 560

Patent

active

055769128

ABSTRACT:
In a floating magnetic head, noises produced at the time of reproduction are reduced, thereby enhancing the precision of detection of a track position. The floating magnetic head uses a monocrystal magnetic material constituting an electromagnetic transducer element, and a crystal orientation of the monocrystal magnetic material in the electromagnetic transducer element is parallel to a direction of travel of a medium. In the case of .vertline..lambda..sub.111 .vertline.+2.times.10.sup.-6 .ltoreq..vertline..lambda..sub.100 .vertline., the crystal orientation is in the range of a solid angle of 3.multidot.sin.theta..multidot.cos.phi. which satisfies 0.ltoreq..theta.<10 degrees and 0.ltoreq..phi..ltoreq.360 degrees around [111], and in the case of .vertline..lambda..sub.111 .vertline..gtoreq..vertline..lambda..sub.100 .vertline.+2.times.10.sup.-6, the crystal orientation is in the range of a solid angle of sin .theta..multidot.cos.phi. which satisfies 0.ltoreq..theta.<10 degrees and 0.ltoreq..phi..ltoreq.360 degrees around [100], where .lambda..sub.111 and .lambda..sub.100 respectively represent linear magnetostriction constant of the monocrystal magnetic material in directions <111> and <100>. The monocrystal magnetic material is a monocrystal MnZn ferrite whose chemical composition is represented by 20.ltoreq.MnO.ltoreq.40, 10.ltoreq.ZnO.ltoreq.25 50.ltoreq.Fe.sub.2 O.sub.3 .ltoreq.65 in terms of mol. %.

REFERENCES:
patent: 3837910 (1974-09-01), Van der Laan et al.
patent: 4787004 (1988-11-01), Akiho et al.
Aso "Mechanically Induced Anisotropy and its Effect on Magnetic Permeability in Single Crystal Ferrites" IEEE Trans. Mag., vol. Mag. 14(2); Mar. 1978 pp. 76-81.

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