Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK.
J Phys Condens Matter. 2012 Jan 18;24(2):024205. doi: 10.1088/0953-8984/24/2/024205. Epub 2011 Dec 15.
Micromagnetic and analytical models are used to investigate how in-plane uniaxial anisotropy affects transverse and vortex domain walls in nanowires where shape anisotropy dominates. The effect of the uniaxial anisotropy can be interpreted as a modification of the effective wire dimensions. When the anisotropy axis is aligned with the wire axis (θ(a) = 0), the wall width is narrower than when no anisotropy is present. Conversely, the wall width increases when the anisotropy axis is perpendicular to the wire axis (θ(a) = π/2). The anisotropy also affects the nanowire dimensions at which transverse walls become unstable. This phase boundary shifts to larger widths or thicknesses when θ(a) = 0, but smaller widths or thicknesses when θ(a) = π/2.
微磁学和解析模型被用于研究面内单轴各向异性如何影响在形状各向异性起主导作用的纳米线中的横向和涡旋畴壁。单轴各向异性的影响可以解释为对有效线尺寸的修正。当各向异性轴与线轴平行（θ(a) = 0）时，壁的宽度比没有各向异性时窄。相反，当各向异性轴垂直于线轴时（θ(a) = π/2），壁的宽度增加。各向异性还影响横向壁变得不稳定的纳米线尺寸。当θ(a) = 0 时，这个相界会向较大的宽度或厚度移动，但当θ(a) = π/2 时，会向较小的宽度或厚度移动。
