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Magnetic-Pole Flip by Millimeter Wave.
Ohkoshi, Shin-Ichi; Yoshikiyo, Marie; Imoto, Kenta; Nakagawa, Kosuke; Namai, Asuka; Tokoro, Hiroko; Yahagi, Yuji; Takeuchi, Kyohei; Jia, Fangda; Miyashita, Seiji; Nakajima, Makoto; Qiu, Hongsong; Kato, Kosaku; Yamaoka, Takehiro; Shirata, Masashi; Naoi, Kenji; Yagishita, Koichi; Doshita, Hiroaki.
Afiliação
  • Ohkoshi SI; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Yoshikiyo M; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Imoto K; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Nakagawa K; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Namai A; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Tokoro H; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Yahagi Y; Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
  • Takeuchi K; Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
  • Jia F; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Miyashita S; Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Nakajima M; Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Qiu H; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan.
  • Kato K; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan.
  • Yamaoka T; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan.
  • Shirata M; Analysis Systems Solution Development Dept., Metrology and Analysis Systems Product Div., Hitachi High-Tech Corporation, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa, 213-0012, Japan.
  • Naoi K; Recording Media Research & Development Laboratories, FUJIFILM Corporation, 12-1, Ohgi-cho 2-Chome, Odawara-shi, Kanagawa, 250-0001, Japan.
  • Yagishita K; Recording Media Research & Development Laboratories, FUJIFILM Corporation, 12-1, Ohgi-cho 2-Chome, Odawara-shi, Kanagawa, 250-0001, Japan.
  • Doshita H; Recording Media Research & Development Laboratories, FUJIFILM Corporation, 12-1, Ohgi-cho 2-Chome, Odawara-shi, Kanagawa, 250-0001, Japan.
Adv Mater ; 32(48): e2004897, 2020 Dec.
Article em En | MEDLINE | ID: mdl-33029839
ABSTRACT
In the era of Big Data and the Internet of Things, data archiving is a key technology. From this viewpoint, magnetic recordings are drawing attention because they guarantee long-term data storage. To archive an enormous amount of data, further increase of the recording density is necessary. Herein a new magnetic recording methodology, "focused-millimeter-wave-assisted magnetic recording (F-MIMR)," is proposed. To test this methodology, magnetic films based on epsilon iron oxide nanoparticles are prepared and a focused-millimeter-wave generator is constructed using terahertz (THz) light. Irradiating the focused millimeter wave to epsilon iron oxide instantly switches its magnetic pole direction. The spin dynamics of F-MIMR are also calculated using the stochastic Landau-Lifshitz-Gilbert model considering all of the spins in an epsilon iron oxide nanoparticle. In F-MIMR, the heat-up effect of the recording media is expected to be suppressed. Thus, F-MIMR can be applied to high-density magnetic recordings.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Ano de publicação: 2020 Tipo de documento: Article
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PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Ano de publicação: 2020 Tipo de documento: Article