Title:
MAGNETIC RECORDING AND REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JP3022023
Kind Code:
B2
Abstract:
PURPOSE: To obtain good sensitivity and a high reproducing output by alternately layering a magnetic film impressed with strong anisotropy depending upon a bias film and a magnetic film impressed with weak anisotropy via a nonmagnetic conductive film.
CONSTITUTION: An antiferromagnetic film 32, a magnetic film 11, a nonmagnetic film 20, a magnetic film 12 and a ferromagnetic film 33 are layered on a substrate 50, connecting electrodes. The antiferromagnetic film 32 and the ferromagnetic film 33 are in close contact respectively with the two layers of the magnetic films 11 and 12 separated by the nonmagnetic film, and magnetization of the magnetic films 11 and 12 is induced in the directions of arrows 61 and 62 respectively by heat treatment in a magnetic field in the parallel and orthogonal directions 72 and 73 to the direction 60 of a magnetic field to be sensed or magnetization processing. The antiferromagnetic film 32 is desirable to be nickel oxide for a magnetoresistance effect element in this constitution. Then, it is preferable that the ferromagnetic film is an alloy of Ni 70-90 atomic %, Fe 5-30 atomic %, and Co 1-5 atomic %, or an alloy of Co 30-85 atomic % and Fe 2-50 atomic %.
Inventors:
Hiroyuki Hoshiya
Katsuya Mitsuoka
Masaaki Sato
Reiko Arai
Susumu Soeya
Hiroshi Fukui
Moriaki Fuyama
Fumio Sato
Katsuya Mitsuoka
Masaaki Sato
Reiko Arai
Susumu Soeya
Hiroshi Fukui
Moriaki Fuyama
Fumio Sato
Application Number:
JP1843093A
Publication Date:
March 15, 2000
Filing Date:
February 05, 1993
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G11B5/012; G11B5/09; G11B5/39; G11B5/48; H01F10/06; (IPC1-7): G11B5/39; H01F10/06
Attorney, Agent or Firm:
Yasuo Sakuta