2014/01/05 by Riccardo Hertel, Hertel, Riccardo, Attila Kákay +1
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties and Applications #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #ZnO doping and properties
paper · pdf · doi:10.48550/arxiv.1401.0909
openalex publication_date 2014/01/05 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
The one-dimensional problem of a static head-to-head domain wall structure in\na thin soft-magnetic nanowire with circular cross-section is treated within the\nframework of micromagnetic theory. A radius-dependent analytic form of the\ndomain wall profile is derived by decomposing the magnetostatic energy into a\nmonopolar and a dipolar term. We present a model in which the dipolar term of\nthe magnetostatic energy resulting from the transverse magnetization in the\ncenter of the domain wall is calculated with Osborn's formulas for\nhomogeneously magnetized ellipsoids [Phys. Rev. 67, 351 (1945)]. The analytic\nresults agree almost perfectly with simulation data as long as the wire\ndiameter is sufficiently small to prevent inhomogeneities of the magnetization\nalong the cross-section. Owing to the recently demonstrated negligible D "oring\nmass of these walls, our results should also apply to the dynamic case, where\ndomain walls are driven by spin-transfer toque effects and/or an axial magnetic\nfield.\n