Invention Grant
- Patent Title: Magnetic recording apparatus utilizing a spin torque oscillator which interacts with an antenna layer in the magnetic recording medium
- Patent Title (中): 利用与磁记录介质中的天线层相互作用的自旋扭矩振荡器的磁记录装置
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Application No.: US12512237Application Date: 2009-07-30
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Publication No.: US08120875B2Publication Date: 2012-02-21
- Inventor: Masayuki Takagishi , Kenichiro Yamada , Hitoshi Iwasaki , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu
- Applicant: Masayuki Takagishi , Kenichiro Yamada , Hitoshi Iwasaki , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Ohlandt, Greeley, Ruggiero & Perle, L.L.P.
- Priority: JP2008-198144 20080731
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
A magnetic recording apparatus includes a magnetic recording head having a magnetic pole and a spin torque oscillator, the spin torque oscillator being placed adjacent to the magnetic pole and includes at least two magnetic layers of a first magnetic layer and a second magnetic layer, and a magnetic recording medium includes two magnetic layers of a recording layer and an antenna layer, the recording layer including a hard magnetic material, such that the antenna layer is formed closer to the magnetic recording head than the recording layer, in which the antenna layer has a resonance frequency fa lower than a resonance frequency fr of the recording layer, greater than a resonance frequency of the second magnetic layer, and the recording layer and the antenna layer are ferromagnetically coupled to each other.
Public/Granted literature
- US20100027161A1 MAGNETIC RECORDING APPARATUS Public/Granted day:2010-02-04
Information query
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