Title:
積層媒体内の個々の磁気層として反強磁性結合を有する積層磁気記録媒体
Document Type and Number:
Japanese Patent JP3924532
Kind Code:
B2
Abstract:
A laminated magnetic recording medium for data storage uses a magnetic recording layer having at least two antiferromagnetically-coupled (AFC) layers spaced apart by a nonferromagnetic spacer layer. Each AFC layer is formed as two ferromagnetic films antiferromagnetically coupled together across an antiferromagnetically coupling film that has a composition and thickness to induce antiferromagnetic coupling of the second film to the first film. The magnetic moments of the two antiferromagnetically-coupled films in each AFC layer are oriented antiparallel, and thus the net remanent magnetization-thickness product (Mrt) of each AFC layer is the difference in the Mrt values of the two ferromagnetic films. The nonferromagnetic spacer layer between neighboring AFC layers has a composition and thickness to prevent any antiferromagnetic coupling of the ferromagnetic films of one AFC layer with the ferromagnetic films of the neighboring AFC layer.
Inventors:
Van, Do, Hoa
Fullerton, Eric, Edward
Margulies, David, Thomas
Rosen, Hull, Jarvis
Fullerton, Eric, Edward
Margulies, David, Thomas
Rosen, Hull, Jarvis
Application Number:
JP2002514718A
Publication Date:
June 06, 2007
Filing Date:
July 06, 2001
Export Citation:
Assignee:
Hitachi Global Storage Technologies Netherlands BV
International Classes:
G11B5/65; G11B5/66; C23C28/00; C23C28/02; G11B5/64; G11B5/673; G11B5/708; G11B5/738; H01F10/26
Domestic Patent References:
| JP6096433A | ||||
| JP2001056921A | ||||
| JP2001056924A | ||||
| JP2001148110A |
Foreign References:
| US6153320 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation
Katsuo Ogawa
Katsuo Ogawa