Domain walls within domain walls in wide ferromagnetic strips
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
PHYSICAL REVIEW B, Volume 92, issue 10
AbstractWe carry out large-scale micromagnetic simulations that demonstrate that due to topological constraints, internal domain walls (Bloch lines) within extended domain walls are more robust than domain walls in nanowires. Thus, the possibility of spintronics applications based on their motion channeled along domain walls emerges. Internal domain walls are nucleated within domain walls in perpendicularly magnetized media concurrent with a Walker breakdown-like abrupt reduction of the domain wall velocity above a threshold driving force, and may also be generated within pinned, localized domain walls. We observe fast field and current driven internal domain wall dynamics without a Walker breakdown along pinned domain walls, originating from topological protection of the internal domain wall structure due to the surrounding out-of-plane domains.
Herranen , T & Laurson , L 2015 , ' Domain walls within domain walls in wide ferromagnetic strips ' , Physical Review B , vol. 92 , no. 10 , 100405 , pp. 1-5 . https://doi.org/10.1103/PhysRevB.92.100405