论文标题
双轴条纹中的域壁的单向倾斜与dzyaloshinskii-moriya相互作用
Unidirectional tilt of domain walls in equilibrium in biaxial stripes with Dzyaloshinskii-Moriya interaction
论文作者
论文摘要
手性磁性域壁在赛道中的方向决定了其动力学特性。在平衡中，磁性域壁有望定向垂直于条纹轴。我们证明了单向域壁的出现在具有双轴各向异性和dzyaloshinskii-moriya相互作用（DMI）的平面外磁性条纹中的倾斜（DMI）。倾斜是平面易于轴各向异性和DMI之间相互作用的结果。我们表明，附加各向异性和DMI更喜欢不同的域壁结构：各向异性将磁化方位角的方位角与各向异性方向联系起来，与DMI相比，该方向与DMI相反，DMI偏爱垂直于域壁平面的磁化。他们与域壁扩展所产生的能量增益的平衡定义了域壁倾斜的平衡磁化。我们证明，在支撑倾斜壁的系统中，可以增强域壁的Walker场和相应的Walker速度。
The orientation of a chiral magnetic domain wall in a racetrack determines its dynamical properties. In equilibrium, magnetic domain walls are expected to be oriented perpendicular to the stripe axis. We demonstrate the appearance of a unidirectional domain wall tilt in out-of-plane magnetized stripes with biaxial anisotropy and Dzyaloshinskii--Moriya interaction (DMI). The tilt is a result of the interplay between the in-plane easy-axis anisotropy and DMI. We show that the additional anisotropy and DMI prefer different domain wall structure: anisotropy links the magnetization azimuthal angle inside the domain wall with the anisotropy direction in contrast to DMI, which prefers the magnetization perpendicular to the domain wall plane. Their balance with the energy gain due to domain wall extension defines the equilibrium magnetization the domain wall tilting. We demonstrate that the Walker field and the corresponding Walker velocity of the domain wall can be enhanced in the system supporting tilted walls.
