Scaling laws of domain walls in magnetic nanowires
Scaling laws of domain walls in magnetic nanowires
复制标题
磁性纳米线中畴壁的缩放定律
DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
K. Kühn
中科院分区:
文献类型:
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作者:
K. Kühn
This paper investigates magnetic 180 degree domain walls in thin wires. It establishes a crossover between two scaling regimes for the energy as a function of the radiusR. For small radii the optimal scaling can be realized by a transverse wall for which the magnetization is constant on each cross section. For large radii a vortex wall yields the optimal scaling. Moreover we show that for R → 0 the energy minimization problem Γ-converges to a local, one dimensional problem where the energy is given by π‖∂xm‖L2(R) + π2 ‖my‖L2(R).