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| Presentation | 2011-11-18 15:30 Application of spin-torque oscillator to read head for hard disk drive Tazumi Nagasawa, Hirofumi Suto, Kiwamu Kudo, Tao Yang, Koichi Mizushima, Rie Sato (Toshiba)  MR2011-22 Link to ES Tech. Rep. Archives: MR2011-22 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Spin-torque and thermal magnetic noises in read heads for HDD with areal density over 2 Tb/in2 are predicted to seriously reduce the signal-to-noise (S/N) ratios. To overcome these problems, a novel read head composed of a spin-torque oscillator (STO) has recently been proposed. This STO reader utilizes the frequency tunability of STO by an applied field. The STO reader is expected to obtain high signal-transfer-rate beyond 5 Gbps and sufficiently high S/N ratios for areal density over 2 Tb/in2. In this article, we present an experimental study of the temporal response of an STO to a pulsed magnetic field by a real-time oscilloscope. Stable oscillation is sustained in the presence of the pulsed magnetic field, and the frequency responds to a change of magnetic field in less than 1 ns. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Spin-torque Oscillator / STO / Magnetic Recording / Read Head / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, Nov. 2011. | |
| Paper # | ||
| Date of Issue | 2011-11-11 (MR) | |
| 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 | MR2011-22 Link to ES Tech. Rep. Archives: MR2011-22 |
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| Conference Information | |
| Committee | MRIS ITE-MMS |
| Conference Date | 2011-11-18 - 2011-11-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Waseda Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Hard disk drive technology, etc. |
| Paper Information | |
| Registration To | MRIS |
| Conference Code | 2011-11-MR-MMS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Application of spin-torque oscillator to read head for hard disk drive |
| Sub Title (in English) | |
| Keyword(1) | Spin-torque Oscillator |
| Keyword(2) | STO |
| Keyword(3) | Magnetic Recording |
| Keyword(4) | Read Head |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tazumi Nagasawa |
| 1st Author's Affiliation | Toshiba Corporation (Toshiba) |
| 2nd Author's Name | Hirofumi Suto |
| 2nd Author's Affiliation | Toshiba Corporation (Toshiba) |
| 3rd Author's Name | Kiwamu Kudo |
| 3rd Author's Affiliation | Toshiba Corporation (Toshiba) |
| 4th Author's Name | Tao Yang |
| 4th Author's Affiliation | Toshiba Corporation (Toshiba) |
| 5th Author's Name | Koichi Mizushima |
| 5th Author's Affiliation | Toshiba Corporation (Toshiba) |
| 6th Author's Name | Rie Sato |
| 6th Author's Affiliation | Toshiba Corporation (Toshiba) |
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| Speaker | Author-1 |
| Date Time | 2011-11-18 15:30:00 |
| Presentation Time | 30 minutes |
| Registration for | MRIS |
| Paper # | MR2011-22 |
| Volume (vol) | vol.111 |
| Number (no) | no.307 |
| Page | pp.21-25 |
| #Pages | 5 |
| Date of Issue | 2011-11-11 (MR) |
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