Intrinsic pinning behavior and propagation onset of three-dimensional Bloch-point domain wall in a cylindrical ferromagnetic nanowire

Hong Guang Piao, Je Ho Shim, Dede Djuhana, Dong Hyun Kim

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We have investigated dynamic behavior of a three-dimensional magnetic domain wall (DW) having a Bloch-point structure in a cylindrical ferromagnetic nanowire via micromagnetic simulations. We have found the existence of an onset depinning behavior of the Bloch-point domain wall (BP-DW) motion under external magnetic fields, which is originated from overcoming an intrinsic pinning barrier generated from spin configuration of the Bloch-point domain wall inner structure. Ultrafast sequential switching of Bloch-point spins is expected to have a single precessional motion with negligible ringing on a few picoseconds time scale, which might be attractive for future spintronic applications.

Original languageEnglish
Article number112405
JournalApplied Physics Letters
Volume102
Issue number11
DOIs
Publication statusPublished - 18 Mar 2013

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