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| Presentation | 2012-10-19 08:55 [Invited Talk] 5Tb/in2 Bit Patterned Media Fabricated by a Directed Self-Assembling Polymer Mask Yoshiyuki Kamata, Tomoyuki Maeda, Hiroyuki Hieda, Ryosuke Yamamoto, Naoko Kihara, Akira Kikitsu (Toshiba corp.)  MR2012-25 Link to ES Tech. Rep. Archives: MR2012-25 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | FePt bit patterned media (BPM) was fabricated with a self-assembled polymer mask with 12 nm pitch (equivalent to 5 Tdot/inch2). A 3.2 nm FePt film with high c axis crystal orientation was prepared for the magnetic recording layer. A solvent vapor annealing was applied for uniform directed self-assembling of PS (Polystyrene)-PDMS (polydimethylsiloxane) diblock copolymer. Pattern transfer from a polymer mask to FePt layer was successfully achieved by employing a C hard mask. In spite of excellent magnetic characteristics of FePt layer, the fabricated FePt BPM showed small coercivity (Hc) of 6 kOe and large switching field distribution (SFD) of 21%. These results are due to the etching damage of FePt dots. Disordering of FePt L10 phase by the etching damage reduced magnetic anisotropy energy (Ku). | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | bit patterned media / FePt / diblock copolymer / directed self-assembly / switching field distribution / HDD / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, Oct. 2012. | |
| Paper # | ||
| Date of Issue | 2012-10-11 (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 | MR2012-25 Link to ES Tech. Rep. Archives: MR2012-25 |
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| Conference Information | |
| Committee | MRIS ITE-MMS |
| Conference Date | 2012-10-18 - 2012-10-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | AIT |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Recording head, Spintronics, etc. |
| Paper Information | |
| Registration To | MRIS |
| Conference Code | 2012-10-MR-MMS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | 5Tb/in2 Bit Patterned Media Fabricated by a Directed Self-Assembling Polymer Mask |
| Sub Title (in English) | |
| Keyword(1) | bit patterned media |
| Keyword(2) | FePt |
| Keyword(3) | diblock copolymer |
| Keyword(4) | directed self-assembly |
| Keyword(5) | switching field distribution |
| Keyword(6) | HDD |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yoshiyuki Kamata |
| 1st Author's Affiliation | Toshiba corporation (Toshiba corp.) |
| 2nd Author's Name | Tomoyuki Maeda |
| 2nd Author's Affiliation | Toshiba corporation (Toshiba corp.) |
| 3rd Author's Name | Hiroyuki Hieda |
| 3rd Author's Affiliation | Toshiba corporation (Toshiba corp.) |
| 4th Author's Name | Ryosuke Yamamoto |
| 4th Author's Affiliation | Toshiba corporation (Toshiba corp.) |
| 5th Author's Name | Naoko Kihara |
| 5th Author's Affiliation | Toshiba corporation (Toshiba corp.) |
| 6th Author's Name | Akira Kikitsu |
| 6th Author's Affiliation | Toshiba corporation (Toshiba corp.) |
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| Speaker | Author-1 |
| Date Time | 2012-10-19 08:55:00 |
| Presentation Time | 50 minutes |
| Registration for | MRIS |
| Paper # | MR2012-25 |
| Volume (vol) | vol.112 |
| Number (no) | no.249 |
| Page | pp.43-48 |
| #Pages | 6 |
| Date of Issue | 2012-10-11 (MR) |
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