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| Presentation | 2019-12-05 14:50 Micromagnetic analysis of MAMR recording head -- A consideration for stable oscillation of STO at low applied current density -- Ryo Itagaki, Yasushi Kanai (NIIT), Simon Greaves (Tohoku Univ.)  MRIS2019-41 Link to ES Tech. Rep. Archives: MRIS2019-41 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A micromagnetic model analysis of STOs was carried out to realize stable STO oscillation with small J. Using write heads with a tilted and parallel, 20 nm MP – TS gap we investigated STO oscillation as a function of 1) STO tilt angle with respect to recording media surface and 2) Gilbert damping factor α of the write head. We found 1) Gilbert damping factor α of the write head, especially in the main pole – trailing shield (MP – TS) gap region, greatly affected the STO oscillation. 2) STO oscillated stably in a parallel MP – TS gap. 3) STO/gap tilt angle of 15° seemed good. 4) Injected current density to STO of J = 3×10^8 A/cm^2 was enough, compared with J = 6×10^8 A/cm^2 in our previous models. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Microwave-Assisted Magnetic Recording (MAMR) / Spin Torque Oscillator (STO) / Write Heads / Micromagnetic Simulation / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 119, no. 326, MRIS2019-41, pp. 13-18, Dec. 2019. | |
| Paper # | MRIS2019-41 | |
| Date of Issue | 2019-11-28 (MRIS) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | MRIS2019-41 Link to ES Tech. Rep. Archives: MRIS2019-41 |
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| Conference Information | |
| Committee | MRIS ITE-MMS |
| Conference Date | 2019-12-05 - 2019-12-06 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ehime University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Signal Processing and Others |
| Paper Information | |
| Registration To | MRIS |
| Conference Code | 2019-12-MRIS-MMS |
| Language | Japanese |
| 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) | A consideration for stable oscillation of STO at low applied current density |
| Keyword(1) | Microwave-Assisted Magnetic Recording (MAMR) |
| Keyword(2) | Spin Torque Oscillator (STO) |
| Keyword(3) | Write Heads |
| Keyword(4) | Micromagnetic Simulation |
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| 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.) |
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| Speaker | Author-1 |
| Date Time | 2019-12-05 14:50:00 |
| Presentation Time | 25 minutes |
| Registration for | MRIS |
| Paper # | MRIS2019-41 |
| Volume (vol) | vol.119 |
| Number (no) | no.326 |
| Page | pp.13-18 |
| #Pages | 6 |
| Date of Issue | 2019-11-28 (MRIS) |
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