Correlation between interlayer exchange coupling and domain wall velocity in multilayered magnetic wires
Correlation between interlayer exchange coupling and domain wall velocity in multilayered magnetic wires
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DOI：
10.1016/j.jmmm.2022.170218
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发表时间：
2022-11
影响因子：
2.7
通讯作者：
Takafumi J. Suzuki;Masaaki Tanaka;Tatsuro Ohmasa;S. Honda;S. Honda;H. Awano;K. Mibu
中科院分区：
文献类型：
--
作者：
Takafumi J. Suzuki;Masaaki Tanaka;Tatsuro Ohmasa;S. Honda;S. Honda;H. Awano;K. Mibu
研究了{Tb/Co}4/Rh/{Co/Tb}4/Pt多层线中层间交换耦合（IEC）对畴壁结构和畴壁速度的影响。结果表明，随着反铁磁IEC强度的增加，Néel型DW的稳定性增强，电流诱导DW运动的速度增加。基于Landau-Lifshitz方程的微磁学模拟表明，DW中磁矩的方向依赖于反铁磁IEC强度，Néel型DW的稳定性随反铁磁IEC强度的增加而增加.由于这种稳定性，自旋-轨道力矩有效地影响DW的磁矩，DW速度增加。这些结果意味着，DW速度在磁畴为基础的存储器可以控制的反铁磁IEC强度。
The effect of interlayer exchange coupling (IEC) in {Tb/Co}4/Rh/{Co/Tb}4/Pt multilayered wires on the domain wall (DW) structure and DW velocity was investigated. It was found that the stability of the Néel-type DWs was enhanced and the velocity of the current-induced DW movement increased with an increase in the antiferromagnetic IEC strength. The micromagnetic simulation based on the Landau–Lifshitz equation clarifies that the direction of the magnetic moment in the DWs depends on the antiferromagnetic IEC strength, and the stability of the Néel-type DW increases with an increase in the antiferromagnetic IEC strength. As a consequence of this stability, the spin-orbital torque affects effectively on the magnetic moment of the DWs and the DW velocity increases. These results imply that the DW velocity in magnetic domain-based memories can be controlled by the antiferromagnetic IEC strength.