Static information storage and retrieval – Systems using particular element – Magnetic thin film
Reexamination Certificate
2005-05-24
2005-05-24
Nguyen, VanThu (Department: 2824)
Static information storage and retrieval
Systems using particular element
Magnetic thin film
C365S173000, C365S180000, C365S158000
Reexamination Certificate
active
06898115
ABSTRACT:
A magnetoresistive film has at least a first magnetic layer, a second magnetic layer, a nonmagnetic layer, a third magnetic layer, and a fourth magnetic layer stacked in the order named. In the magnetoresistive film, at least the first magnetic layer contains Gd and the fourth magnetic layer contains Tb and/or Dy, each of the first magnetic layer and fourth magnetic layer has an easy axis of magnetization along a perpendicular direction to a film plane, and the second magnetic layer and the third magnetic layer have a greater spin polarization than the first magnetic layer and the fourth magnetic layer. Furthermore, the second and third magnetic layers are magnetic layers containing at least Co and Co contents thereof are not less than 20 at. % nor more than 90 at. %.
REFERENCES:
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patent: 5966323 (1999-10-01), Chen et al.
patent: 6022633 (2000-02-01), Hayashi et al.
patent: 6219275 (2001-04-01), Nishimura
patent: 6329078 (2001-12-01), Tsuge
patent: 6456467 (2002-09-01), Mao et al.
Patent Abstracts of Japan, for JPLAO 11-13587, published May 21, 1999.
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