论文标题
驱动磁磁体驱动磁性域壁
Driving a magnetized domain wall in an antiferromagnet by magnons
论文作者
论文摘要
从理论上讲，在沿易于轴施加的外部磁场的情况下，我们研究了一维易于轴抗铁磁体的镁的相互作用，自旋波的量子和域壁的相互作用。为此，我们首先在通过外场磁化的域壁的背景中获得了旋转波的精确解决方案。显示域壁内的有限磁化显示会引起域壁散射的镁的反射，这与在没有磁场的情况下偏离了无反射的镁的众所周知的结果。对于预测的镁反射的实际应用，我们表明镁反射有助于热驱动的域壁运动。我们的工作使我们想到，在诸如涡流和天空之类的防铁磁孤子中诱导有限磁化可以用于引起在没有磁化情况下不会发生的现象。
We theoretically study the interaction of magnons, quanta of spin waves, and a domain wall in a one-dimensional easy-axis antiferromagnet in the presence of an external magnetic field applied along the easy axis. To this end, we begin by obtaining the exact solution for spin waves in the background of a domain wall magnetized by an external field. The finite magnetization inside the domain wall is shown to give rise to reflection of magnons scattering off the domain wall, deviating from the well-known result of reflection-free magnons in the absence of a magnetic field. For practical applications of the predicted reflection of magnons, we show that the magnon reflection contributes to the thermally-driven domain-wall motion. Our work leads us to envision that inducing a finite magnetization in antiferromagnetic solitons such as vortices and skyrmions can be used to engender phenomena that do not occur in the absence of magnetization.
