13:30 〜 15:30
▲ [19p-P1-31] Domain wall dynamics in ferrimagnetic Tb/Co multilayer wires below and above the magnetic compensation point
キーワード：Current-driven motion of magnetic domain walls,Ferrimagnetic material
Electric-current-induced movements of domain walls in magnetic wires are paid attention because of the curiosity from fundamental physics and their potential as new spintronics devices. Our previous studies on ferrimagnetic TbFeCo wires implied that the current-induced movements of the domain walls have different behavior between TbFeCo with transition-metal-dominant magnetization and that with rare-earth-dominant magnetization. In this works, we investigated the dominant-magnetization dependence of current-induced dynamics in ferrimagnetic Tb/Co multilayer wires.
Tb/Co multilayer wires and Hall bars were fabricated on thermally oxidized Si substrates using electron- beam lithography, sputtering and a lift-off method. A magnetic domain was generated in the center of the wire using a laser heating method. The dominant magnetization in the Tb/Co multilayer wire can be adjusted by temperature. The current-induced dynamics of domain walls was detected by the anomalous Hall effect under periodic current pulses at various temperatures.
The temperature and current-pulse dependence will be discussed in the presentation.
Tb/Co multilayer wires and Hall bars were fabricated on thermally oxidized Si substrates using electron- beam lithography, sputtering and a lift-off method. A magnetic domain was generated in the center of the wire using a laser heating method. The dominant magnetization in the Tb/Co multilayer wire can be adjusted by temperature. The current-induced dynamics of domain walls was detected by the anomalous Hall effect under periodic current pulses at various temperatures.
The temperature and current-pulse dependence will be discussed in the presentation.