Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1991-03-12
1994-02-15
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
360126, 428668, 428694R, G11B 530, G11B 5147, B32B 1500
Patent
active
052872378
ABSTRACT:
In order to prevent generation of Barkhausen noise of a magnetoresistance-effect element, a thin antiferromagnetic film formed of Fe-Mn-X alloy containing a third alloying element X (which serves to improve corrosion resistance of Fe-Mn alloy) by 0.1 to 20 atomic % is disposed in adjacent to a thin permalloy film. The element X is selected from the group consisting of Ir, Ru, Zr, Nb, Si, Ge, V, Co, Pt and Pd. It is particularly recommended to employ Ir of 4 to 15 atomic % or Ru of 5.5 to 15 atomic % as the element X. When one or more alloying element selected from Ru, Rh, Pt, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Ni, Cu, Al, Si and Ge is added to Fe and Mn which are essential components of the Fe-Mn-X alloy in addition to the element X, corrosion resistance of the alloy is improved more sufficiently.
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Kitada Masahiro
Koyama Naoki
Nakatani Ryoichi
Shimizu Noboru
Tanabe Hideo
Evans Jefferson
Hitachi , Ltd.
Levy Stuart S.
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