| Presentation | 2021-06-10 Effect of thermal fluctuations on microwave assisted switching in Co/Pt nanodot array Satoshi Mizutani, Nobuaki Kikuchi, Masatoshi Hatayama, Satoshi Okamoto, Takehito Shimatsu, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Microwave assisted magnetization switching (MAS) has been gathered wide interests as one of the prominent technologies for ultra-high density magnetic recording. In MAS, magnetization switching field is reduced by exciting magnetization precession with microwave field with GHz frequency. In this work, we experimentally investigated MAS behavior of Co/Pt multilayers nanodots with diameter of 40-200 nm focusing on the influence of thermal fluctuation. As the dot diameter is reduced to 70 nm, the assistance effect becomes drastically smaller by decreasing the effective time of microwave field application, while coercivity is rather insensitive to the effective time particularly for high microwave frequency. These results suggest that the thermal fluctuation might become significant by reducing the dot diameter, although some parts of the behaviors are possibly due to the damage during nanofabrication process. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Microwave assisted magnetic recording / Microwave assisted magnetization switching / Co/Pt multilayers nanodots |
| Paper # | MRIS2021-2 |
| Date of Issue | 2021-06-03 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2021/6/10(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | RIEC, Tohoku U. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Recording systems, etc. |
| Chair | Shuhei Yoshida(Kinki Univ.) / Kenji Machida(NHK) |
| Vice Chair | |
| Secretary | (Tohoku Inst. of Tech.) / (AIST) |
| Assistant | Yasuaki Nakamura(Ehime Univ.) / Yoshiyuki Hirayama(Samsung) |
| 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) | Effect of thermal fluctuations on microwave assisted switching in Co/Pt nanodot array |
| Sub Title (in English) | |
| Keyword(1) | Microwave assisted magnetic recording |
| Keyword(2) | Microwave assisted magnetization switching |
| Keyword(3) | Co/Pt multilayers nanodots |
| 1st Author's Name | Satoshi Mizutani |
| 1st Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 2nd Author's Name | Nobuaki Kikuchi |
| 2nd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 3rd Author's Name | Masatoshi Hatayama |
| 3rd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 4th Author's Name | Satoshi Okamoto |
| 4th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 5th Author's Name | Takehito Shimatsu |
| 5th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| Date | 2021-06-10 |
| Paper # | MRIS2021-2 |
| Volume (vol) | vol.121 |
| Number (no) | MRIS-60 |
| Page | pp.pp.7-11(MRIS), |
| #Pages | 5 |
| Date of Issue | 2021-06-03 (MRIS) |