Dynamic magnetic information storage or retrieval – Record medium
Reexamination Certificate
2007-09-18
2007-09-18
Bernatz, Kevin M. (Department: 1773)
Dynamic magnetic information storage or retrieval
Record medium
C428S828000, C428S828100
Reexamination Certificate
active
10850988
ABSTRACT:
A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic coupling layer. The first and second magnetic layers are exchange-coupled, and have magnetization directions which are mutually parallel in a state where no external magnetic field is applied thereto, and the first magnetic layer switches the magnetization direction thereof before the second magnetic layer in response to a recording magnetic field which switches the magnetization directions of the first and second magnetic layers.
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Lyberatos, A. Ju, G., van de Verrdonk, J., and Weller, D., J. App. Phys., 91(4), 2002, 2236-2242.
Okamoto Iwao
Umeda Hisashi
Bernatz Kevin M.
Greer Burns & Crain Ltd.
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