Presentation Information
[7p-P03-41]Impedance effects in current-induced magnetic domain wall motion
〇Takahiro Funae1, Hiroyuki Awano1, Kenji Tanabe1 (1.Toyota Tech.Inst.)
Keywords:
Racetrack memory,Spintronics,Impedance
With the increase in data consumption, magnetic memory driven by magnetic walls that is energy efficient and capable of high-speed operation is attracting attention. While high-speed operation with pulses of 10 ns or less has been reported, the effect of fine wire impedance has not been verified. In this study, Pt/GdFe fine wires (constant width, modulated length) were fabricated on electrodes with a characteristic impedance of 50 Ω, and the pulse width and domain wall velocity were measured. At pulse widths of 60 ns or longer, the velocity remained constant at approximately 50 m/s, but at pulse widths of 30 ns or shorter, impedance-dependent variations occurred. This study demonstrated that consideration of fine wire impedance is essential in the short pulse region.