| Presentation | 2018-12-07 Micromagnetic analysis of MAMR recording head Ryo Itagaki, Yasushi Kanai, Simon Greaves, Hiroaki Muraoka, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Micromagnetic model simulations were performed considering a spin-torque oscillator (STO), write head and double-layered recording medium. To reduce the calculation time, we used a simplified model consisting of a STO, recording layer (RL) and soft magnetic underlayer (SUL) and investigated the magnetostatic interactions between the STO and RL. It was found that the STO oscillation frequency was lowered due to the field from the RL, but the oscillation amplitude did not change. We used a second model consisting of a STO, write head, RL and SUL to investigate the effect of the RL on the main pole ? trailing shield (MP-TS) gap field. It was found that the STO oscillation frequency was lowered due to the field from the RL, and the field from RL was large when the RL magnetization switched. Finally, using a third model, we found that increasing the injected current to an STO in a tilted, parallel main pole - trailing shield gap stabilized its rotation, although the conditions were still not ideal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Microwave-Assisted Magnetic Recording (MAMR) / Spin Torque Oscillator (STO) / Write Heads / Micromagnetic Simulation |
| Paper # | MRIS2018-25 |
| Date of Issue | 2018-11-29 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2018/12/6(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ehime University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Signal Processing and Others |
| Chair | Satoshi Matsunuma(Maxell) / Norihiko Ishii(NHK) |
| Vice Chair | |
| Secretary | (Toshiba) / (Kinki Univ.) |
| Assistant | Ikuya Tagawa(Tohoku Inst. of Tech.) / Hiroko Arai(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Group on Multi-media Storage |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Micromagnetic analysis of MAMR recording head |
| Sub Title (in English) | STO with parallel gap write head and the influence of recording layer on STO oscillation |
| Keyword(1) | Microwave-Assisted Magnetic Recording (MAMR) |
| Keyword(2) | Spin Torque Oscillator (STO) |
| Keyword(3) | Write Heads |
| Keyword(4) | Micromagnetic Simulation |
| 1st Author's Name | Ryo Itagaki |
| 1st Author's Affiliation | Niigata Institute of Technology(NIIT) |
| 2nd Author's Name | Yasushi Kanai |
| 2nd Author's Affiliation | Niigata Institute of Technology(NIIT) |
| 3rd Author's Name | Simon Greaves |
| 3rd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 4th Author's Name | Hiroaki Muraoka |
| 4th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| Date | 2018-12-07 |
| Paper # | MRIS2018-25 |
| Volume (vol) | vol.118 |
| Number (no) | MRIS-347 |
| Page | pp.pp.41-46(MRIS), |
| #Pages | 6 |
| Date of Issue | 2018-11-29 (MRIS) |