Thermally Assisted Magnetic Recording using Plasmon Antenna with Ultra Short Laser Pulse

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  • Mano H.
    Graduate School of Science and Technology, Nihon University
  • Yoshikawa H.
    Graduate School of Science and Technology, Nihon University
  • Hashiba H.
    College of Science and Technology, Nihon University
  • Ashizawa Y.
    College of Science and Technology, Nihon University
  • Tsukamoto A.
    College of Science and Technology, Nihon University
  • Sasaki Y.
    Graduate School of Engineering, Tohoku University
  • Saito S.
    Graduate School of Engineering, Tohoku University
  • Takahashi M.
    Graduate School of Engineering, Tohoku University
  • Ohnuki S.
    College of Science and Technology, Nihon University
  • Nakagawa K.
    College of Science and Technology, Nihon University

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As one of the methods for ultra high density recording of hard disk drives, Thermally Assist Magnetic Recording (TAMR) increases memory density and thus attracts attention. The key technology of the TAMR is applying laser light as well as plasmon antenna to generate localized near-field spot. We fabricated plasmon antennas on magnetic film to understand fundamental recording capability by confined near-field stimulated by ultra short laser pulse. Some square plasmon gold antennas were deposited over a magnetic recording film (Co55Pt30Cr15-SiO2). We successfully confirmed that small magnetic domains of 67 nm × 62 nm were written at the corner of the plasmon antennas by the surface plasmon effect with a femto-second laser pulse.

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