Domain walls within domain walls in wide ferromagnetic strips

T. Herranen, L. Laurson

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)
124 Downloads (Pure)

Abstract

We 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.
Original languageEnglish
Article number100405
Pages (from-to)1-5
JournalPhysical Review B
Volume92
Issue number10
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • domain walls

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