铁磁布洛赫线作为弦上的珠子
Ferromagnetic Bloch Line as a Bead on a String
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- Johns Hopkins University（约翰斯·霍普金斯大学）
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中文总结 AI 辅助
本文提出一个将薄膜铁磁体中布洛赫线建模为弦上陀螺珠子的简单模型，该模型能动态隔离畴壁段并反射自旋波，其预测与数值模拟相符。
中文摘要 AI 辅助
我们提出了一个在具有强易轴和中等面内各向异性的薄膜铁磁体中布洛赫线的简单模型。梅伦（meron）被表示为一个带电、无质量的粒子，它沿着线性畴壁在背景磁场中滑动——即一个陀螺式的弦上珠子。其陀螺行为动态地隔离了梅伦两侧的畴壁段，从而激发了一个将布洛赫线视为两个在移动边界处连接的弦的模型。梅伦在该连接处夹紧畴壁，完全反射沿其传播的低振幅自旋波。面外和面内磁场以及自旋转移力矩随后以两种方式作用：对布洛赫线本身施加力，或驱动整个畴壁。该模型的预测与数值模拟结果一致。
英文摘要
We present a simple model of a Bloch line in a thin-film ferromagnet with strong easy-axis and intermediate in-plane anisotropies. The meron is represented as a charged, massless particle that slides along the linear domain wall in a background magnetic field- a gyroscopic bead on a string. Its gyroscopic behavior dynamically isolates the wall segments on either side of the meron, motivating the model for a Bloch line as two strings joined at a moving boundary. The meron clamps the wall at this junction, completely reflecting low-amplitude spin waves that propagate along it. Out-of-plane and in-plane magnetic fields and spin-transfer torques then act in two ways: by exerting a force on the Bloch line itself, or by driving the wall as a whole. Predictions of this model are in agreement with numerical simulations.
