Magnetic Nanohorns for measurement of the interfacial Dzyaloshinskii-Moriya interaction: A micromagnetic study

Abstract

We evaluate the micromagnetic energy of a domain wall contained in a thin, horn-shaped nanostructure and propose a method to extract the strength of the interfacial Dzyaloshinskii-Moriya interaction based on the equilibrium position of the wall. An inplane magnetic field coupled with the interfacial DMI balances a competing driving force related to the "nanohorn" tapering and consequent variation in length. It is evident that the strength of the the DMI is directly correlated to the equilibrium position of the DW. Moreover, the range of measurable DMI values can be controlled by varying the degree of tapering in the nanohorn. Numerical and semi-analytical calculations were separately performed and show broad agreement. The calculations provided here offer an alternative framework for future measurement of DMI, which has been notoriously difficult to do experimentally.

arXiv comment3 pages, 3 figures, submitted to IEEE Transactions on Magnetics

References in corpus (9)

• Skyrmion Lattice in a Chiral Magnet
• The design and verification of Mumax3
• Current-driven dynamics of chiral ferromagnetic domain walls
• Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Asymmetric magnetic bubble expansion under in-plane field in Pt/Co/Pt: effect of interface engineering
• Energetic molding of chiral magnetic bubbles
• Dispersive Stiffness of Dzyaloshinskii Domain Walls
• Disentangling factors governing Dzyaloshinskii domain wall creep in Co/Ni thin films using Pt${}_x$Ir${}_{1-x}$ seedlayers