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| Presentation | 2009-07-16 16:35 Improvement of granular perpendicular magnetic recording media with Si/NiFe/FeCoB crystalline SUL Shunsuke Gomi, Kenichiro Hirata, Toshimitsu Matsuu (TITech), Satoshi Matsunuma, Tetsutaro Inoue, Toshiyuki Watanabe, Tsugihiro Doi (Hitachi Maxell), Shigeki Nakagawa (TITech)  MR2009-20 Link to ES Tech. Rep. Archives: MR2009-20 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Application of crystalline soft magnetic underlayer(SUL) for reduction of the Ru intermediate layer(IML) between recording layer and SUL in perpendicular magnetic recording media has been performed. The use of FeCoB layer as crystalline SUL improves degree of FeCo(110) orientation, and that gives degree of (001) orientation of Ru IML and CoPtCr in CoPtCr-SiO2 recording layer. Then, FeCoB crystalline SULs with seed layer of Ru or Si/NiFe are fabricated and compared to control degree of (110) orientation of FeCo in FeCoB layer. Ru/FeCoB SUL has high anisotropy field. Si/NiFe seed layer improves (110) preferential orientation of FeCo. Si/NiFe seed layer more improved (110) orientation of FeCo than that of Ru. It was confirmed that the use of Ru/FeCoB layer or Si/NiFe/FeCoB layer causes improvement of (001) orientation of Ru IML, which causes improvement of (001) orientation of CoPtCr. The intensity of (002) diffraction peak of CoPtCr is almost constant even though the thickness of Ru IML changes from 30 nm to 1 nm. Coercivity and squareness ratio of recording layer maintained the same value in spite of reducing the thickness of the Ru IML from 30 nm to 5 nm. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Perpendicular magnetic recording media / Crystalline soft magnetic underlayer / Ru intermediate layer / (110) orientation of bcc-FeCo / (001) orientation of hcp-Ru / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, July 2009. | |
| Paper # | ||
| Date of Issue | 2009-07-09 (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 | MR2009-20 Link to ES Tech. Rep. Archives: MR2009-20 |
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| Conference Information | |
| Committee | MRIS ITE-MMS |
| Conference Date | 2009-07-16 - 2009-07-16 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Inst. of Tech. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MRIS |
| Conference Code | 2009-07-MR-MMS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of granular perpendicular magnetic recording media with Si/NiFe/FeCoB crystalline SUL |
| Sub Title (in English) | |
| Keyword(1) | Perpendicular magnetic recording media |
| Keyword(2) | Crystalline soft magnetic underlayer |
| Keyword(3) | Ru intermediate layer |
| Keyword(4) | (110) orientation of bcc-FeCo |
| Keyword(5) | (001) orientation of hcp-Ru |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Shunsuke Gomi |
| 1st Author's Affiliation | Tokyo Institute of Technology (TITech) |
| 2nd Author's Name | Kenichiro Hirata |
| 2nd Author's Affiliation | Tokyo Institute of Technology (TITech) |
| 3rd Author's Name | Toshimitsu Matsuu |
| 3rd Author's Affiliation | Tokyo Institute of Technology (TITech) |
| 4th Author's Name | Satoshi Matsunuma |
| 4th Author's Affiliation | Hitachi Maxell (Hitachi Maxell) |
| 5th Author's Name | Tetsutaro Inoue |
| 5th Author's Affiliation | Hitachi Maxell (Hitachi Maxell) |
| 6th Author's Name | Toshiyuki Watanabe |
| 6th Author's Affiliation | Hitachi Maxell (Hitachi Maxell) |
| 7th Author's Name | Tsugihiro Doi |
| 7th Author's Affiliation | Hitachi Maxell (Hitachi Maxell) |
| 8th Author's Name | Shigeki Nakagawa |
| 8th Author's Affiliation | Tokyo Institute of Technology (TITech) |
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| Speaker | Author-1 |
| Date Time | 2009-07-16 16:35:00 |
| Presentation Time | 25 minutes |
| Registration for | MRIS |
| Paper # | MR2009-20 |
| Volume (vol) | vol.109 |
| Number (no) | no.132 |
| Page | pp.41-45 |
| #Pages | 5 |
| Date of Issue | 2009-07-09 (MR) |
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