• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2022 Fiscal Year Annual Research Report

Laser-induced deterministic magnetization switching for next-generation magnetic recording

Research Project

Project/Area Number 21K14521
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

王 建  国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究員 (80792069)

Project Period (FY) 2021-04-01 – 2023-03-31
Keywordsエネルギーアシスト磁化反転 / FePt媒体 / 光誘起磁化反転 / 熱流スピン流変換 / 超高密度磁気記録
Outline of Annual Research Achievements

The endless explosion of digital data universe accompanies with “Society 5.0”is now pushing the world toward a data storage capacity crisis. Moreover, the energy consumption of data storage devices is increasing exponentially, which can cause serious energy and environmental issues in the near future. Therefore, revolution of current data storage technologies is urgently desired.
In current work, a new magnetic recording technique was designed and developed for the next-generation magnetic recording technology with high recording areal density, ultrafast process speed, and low energy consumption. I have experimentally demonstrated that by utilizing the interconversion between heat (phononic), light (photonic), and spin (spintronic), the magnetization reversal in the magnetic hard FePt nanogranular media can be enhanced and ultrafast manipulated by femtosecond laser pulses. The results of this interdisciplinary research work provide the first experimental demonstration of the application of the magnetothermal effect for magnetization reversal. The unique physical phenomenon and the mechanism behind are believed will attract intensive academic interests. Meanwhile, further optimization of this work will open a new pathway for the laser-induced deterministic magnetization switching in magnetically hard recording media which will gain great attentions from the magnetic recording industry.

Remarks

There are two more academic journal papers under peer-reviewing.
The results will be presented in two academic conference (one domestics, one international) which are waiting for the notification.

  • Research Products

    (2 results)

All 2022

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results)

  • [Journal Article] Strain-Induced Large Anomalous Nernst Effect in Polycrystalline Co2MnGa/AlN Multilayers2022

    • Author(s)
      Jian Wang, Yong‐Chang Lau, Weinan Zhou, Takeshi Seki, Yuya Sakuraba, Takahide Kubota, Keita Ito, Koki Takanashi
    • Journal Title

      Advanced Electronic Materials

      Volume: 8 Pages: 2101380

    • DOI

      10.1002/aelm.202101380

    • Peer Reviewed / Open Access
  • [Journal Article] A study on the relationship of magnetic moments orientation in L10 FePt network nanostructured film by electron energy-loss magnetic chiral dichroism using semi-core excitation spectra2022

    • Author(s)
      Hitoshi Makino, Jan Rusz, Jian Wang, Diego Turenne, Masahiro Ohtsuka, Yukiko K Takahashi, Hermann A Durr, Shunsuke Muto
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 558 Pages: 169522

    • DOI

      10.1016/j.jmmm.2022.169522

    • Peer Reviewed / Int'l Joint Research

URL: 

Published: 2023-12-25  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi