Oscillation Characteristics of Spin-Torque Oscillator Put in Write Gap of SPT Head

• Takahashi T.

  Kogakuin University

• Asaka S.

  Kogakuin University

• Yoshida K.

  Kogakuin University

• Kanai Y.

  Niigata Institute of Technology

Bibliographic Information

Other Title

• ライトギャップ内に配置したSTO素子の発振特性シミュレーション
• ライトギャップ ナイ ニ ハイチ シタ STO ソシ ノ ハッシン トクセイ シミュレーション

Abstract

  Microwave-assisted magnetic recording (MAMR) has been proposed as a promising technique to achieve a higher areal recording density over 1.0 Tbit/inch². MAMR requires a spin-torque oscillator (STO) to generate a strong, high-frequency magnetic field to induce magnetic resonance in a recording medium. The oscillation properties of STOs were previously investigated using micromagnetic models. However, simple models were used that neglected the magnetic interactions between the STO and a single-pole-type (SPT) recording head. The interactions and the magnetic field in the gap between the main pole and the trailing shield might strongly affect the oscillating characteristics. Thus, a new simulator that combines an SPT head and an STO simulator, called an integrated MAMR simulator, has been developed. The magnetic interactions between an SPT and an STO are revealed to have considerable effects on the oscillating frequency and the field strength.

Journal

• Journal of the Magnetics Society of Japan

  Journal of the Magnetics Society of Japan 36 (3), 150-154, 2012

  The Magnetics Society of Japan

Keywords

• microwave-assisted magnetic recording
• spin-torque oscillator
• micromagnetic simulation
• magnetic interaction

Details

• CRID: 1390282680262537088
• NII Article ID: 130002112329
• NII Book ID: AA12297999
• DOI: 10.3379/msjmag.1205r002
• ISSN: 18822932
• ISSN: 18822924
• NDL BIB ID: 023753467
• Web Site: http://id.ndl.go.jp/bib/023753467
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023753467
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed