凝聚态物理
铁磁性
磁畴壁(磁性)
动能
物理
磁场
绝热过程
自旋(空气动力学)
领域(数学)
领域(数学分析)
工作(物理)
材料科学
经典力学
量子力学
磁化
热力学
数学分析
数学
纯数学
作者
Sarabindu Dolui,Sharad Dwivedi
出处
期刊:Chaos
[American Institute of Physics]
日期:2024-12-01
卷期号:34 (12)
摘要
This work delineates a comprehensive investigation of the static and kinetic depinning of a domain wall in a notched ferromagnetic nanostrip. More precisely, we consider a 180° Bloch-type domain wall and examine its behavior under the action of an applied magnetic field, spin-polarized electric current, and Rashba field. Moreover, we assume an artificial notch positioned at the edges of the nanostrip, serving as a pinning site for the wall. We characterize domain walls’ pinning and depinning dynamics in the steady-state regime by using the classical Schryer and Walker trial-function approach. The results demonstrate that the static depinning limits of external stimuli are more significant than the kinetic depinning. It is also observed that higher Rashba field strength increases the static depinning fields/currents while decreasing kinetic depinning ones. Furthermore, both static and kinetic depinning thresholds are elevated with higher damping, whereas an increase in the non-adiabatic spin-transfer parameter leads to a reduction. Finally, we present numerical illustrations of the analytical results, showing good qualitative agreement with the literature.
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