Domain wall motion devices by controlling spin current distribution

2009 Fiscal Year Final Research Report

• Project/Area Number: 19760210
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Electronic materials/Electric materials
• Research Institution: Ibaraki University
• Principal Investigator: KOMINE Takashi Ibaraki University, 工学部, 准教授 (90361287)
• Project Period (FY): 2007 – 2009
• Keywords: スピン流分布 / マイクロマグネティックス / 磁性ナノワイヤ / 磁壁移動

Research Abstract

We developed the micromagnetic simulation including non-uniform spin current distribution, and investigated current-induced domain wall motion in a nanowire. As a result, in an in-plane magnetization nanowire, the influences of notch shape and pulse current on the critical current density driving domain wall motion were clarified. Moreover, the multi-bit motion in a nanowire with perpendicular magnetic anisotropy was demonstrated, and a new issue to realize a nanowire memory was suggested.

Research Products

• [Journal Article] Micromagnetic analysis of current-driven domain wall motion of multi-bit in a nanowire with perpendicular magnetic anisotropy (2010)
  • Author(s): H. Murakami, T. Komine, R. Sugita
  • Journal Title: J. Phys. Conf. Ser. Vol.200,042018 Pages: 1-4
  • Peer Reviewed
• [Journal Article] Micromagnetic study of magnetic printing onto various slave media (2010)
  • Author(s): T. Komine, T. Murakoshi, Y. Tanaka, Y. Sakaguchi, R. Sugita
  • Journal Title: J. Phys. Conf. Ser. Vol.200,102004 Pages: 1-4
  • Peer Reviewed
• [Journal Article] Effect of Non-Adiabatic Spin Torque Parameter on Domain Wall Motion Driven by Pulse Current in a Magnetic Nanowire (2009)
  • Author(s): H. Murakami, T. Komine, R. Sugita
  • Journal Title: IEEE Trans. Magn. vol.45,iss.10 Pages: 3812-3815
  • Peer Reviewed
• [Journal Article] Perpendicular anisotropy master medium in magnetic printing for writing high density servo signal (2009)
  • Author(s): N. Sheeda, M. Nakazawa, H. Konishi, T. Komine, R. Sugita
  • Journal Title: IEEE Trans. Magn. vol.45,iss.10 Pages: 3676-3678
  • Peer Reviewed
• [Journal Article] 磁性細線における磁壁移動の電流パルス波形依存性 (2009)
  • Author(s): 村上宏, 小峰啓史, 杉田龍二
  • Journal Title: J. Magn. Soc. Jpn. vol.33,no.3 Pages: 232-236
  • Peer Reviewed
• [Journal Article] Influence of Notch Shape and Size on Current-Driven Domain Wall Motions in a Magnetic Nanowire (2008)
  • Author(s): T. Komine, H. Murakami, T. Nagayama, R. Sugita
  • Journal Title: IEEE Trans. Magn. vol.44,iss.11 Pages: 2516-2518
  • Peer Reviewed
• [Journal Article] Feasibility of Perpendicular Magnetic Duplication at 1Tbit/inch2 (2008)
  • Author(s): T. Komine, T. Murata, Y. Sakaguchi, Y. Hosoya, N. Sheeda Suhaimi, R. Sugita
  • Journal Title: IEEE Trans. Magn. vol.44,iss.11 Pages: 3416-3418
  • Peer Reviewed
• [Journal Article] 非一様電流による磁壁駆動のマイクロマグネティックシミュレーション (2008)
  • Author(s): 小峰啓史, 村上宏, 永山剛広, 杉田龍二
  • Journal Title: J. Magn. Soc. Jpn. vol.32,no.3 Pages: 280-284
  • Peer Reviewed
• [Presentation] Influence of exchange coupling on current-driven domain wall motion in a nanowire (2010)
  • Author(s): T. Komine, K. Takahashi, H. Murakami, R. Sugita
  • Organizer: Joint MMM-Intermag Conference
  • Place of Presentation: Washington DC
  • Year and Date: 2010-01-21
• [Remarks] 茨城大学学長表彰(奨励賞), 「非一様電流を考慮した磁壁電流駆動のマイクロマグネティックシミュレーション」, 2009年9. 月17日
• [Remarks] 日本磁気学会学術奨励賞(内山賞), 「非一様電流を考慮した磁壁電流駆動のマイクロマグネティックシミュレーション」, 2008年9月14日