Dynamic magnetic information storage or retrieval – Head – Core
Patent
1983-01-31
1986-08-05
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Core
360113, 360122, 360125, G11B 5133, G11B 5127, G11B 5187
Patent
active
046046704
ABSTRACT:
A magnetic head (1) having a (monocrystalline) core (2) of a magnetizable material which provides a substantially closed path for magnetic flux (B) in write/read operations of the magnetic head (1). In order to provide a magnetic head which has an improved signal-to-noise ratio in particular in the frequency range from 0.5-10 MHz, the magnetizable material of the core (2) shows essentially a uniaxial magnetic anisotropy having an easy axis of magnetization which is transverse to the plane of the path for the magnetic flux. Said orientation of the easy axis of magnetization is produced in one embodiment by coating the faces of the core which are parallel to the path for the magnetic flux with layers of non-magnetizable material which exert a (tensile or compressive) stress in said planes.
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ITO, "Knoop Hardness Anisotropy and Plastic Deformation in Mn--Zn Ferrite Single Crystals", Journal of the American Ceramic Society, vol. 54, No. 1, Jan. 1971.
Heinz A. J.
Treacy David R.
U.S. Philips Corporation
Urcia Benjamin E.
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