Information recording medium and information storing device
AssigneeFujitsu Limited
InventorsToshio Sugimoto, Takuya Uzumaki
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Abstract
A perpendicular magnetic recording medium including a substrate, a soft-magnetic backing layer formed on the substrate, a magnetic recording layer having perpendicular magnetic anisotropy formed on the backing layer, and a leakage magnetic field control layer having ferrimagnetism formed on the magnetic recording layer. The leakage magnetic field control layer is exchange-coupled to the magnetic recording layer antiferromagnetically or ferrimagnetically to thereby suppress the influence of leakage magnetic fields from the backing layer and the magnetic recording layer and reduce the medium noise.
Claims9
An information recording medium comprising:
- a substrate;
- a ferromagnetic recording layer formed on the upper side of said substrate, said ferromagnetic recording layer having perpendicular magnetic anisotropy;
- and
- a ferrimagnetic layer formed on at least one of the upper and lower sides of said ferromagnetic recording layer, said ferrimagnetic layer exhibiting magnetization opposite to the magnetization of said ferromagnetic recording layer in its magnetized condition.
Dependencies are inferred from the claim text.