论文标题
在平面应变梯度驱动的手性尼尔域壁的动力学中，没有沃克分解
Absence of Walker breakdown in the dynamics of chiral Neel domain walls driven by in-plane strain gradients
论文作者
论文摘要
从理论上讲，我们从平面应变梯度驱动的垂直磁化系统中的手性néel结构壁壁的运动。我们表明，这种应变驱动域壁有效地增加了阳性（负）磁性材料的拉伸（压缩）应变。在其运动过程中，由于应变梯度而导致的局部阻尼扭矩，它会反对采用扭矩。该扭矩可防止湍流动力学的发作，并且对于任何任意的大应变梯度，都渐近地达到了稳定的域壁运动。随着验证，在逼真的条件下，可以使用电压诱导的应变获得500 m/s的速度。
We investigate theoretically the motion of chiral Néel domain walls in perpendicularly magnetized systems driven by in-plane strain gradients. We show that such strain drives domain walls efficiently towards increasing tensile (compressive) strain for positive (negative) magnetostrictive materials. During their motion a local damping torque that opposes the precessional torque due to the strain gradient arises. This torque prevents the onset of turbulent dynamics, and steady domain wall motion with constant velocity is asymptotically reached for any arbitrary large strain gradient. Withal, velocities in the range of 500 m/s can be obtained using voltage-induced strain under realistic conditions.
