Vortex Chain States in a Ferromagnet/Superconductor Bilayer

Details Vortex Chain States in a Ferromagnet/Superconductor Bilayer Vortex Chain States in a Ferromagnet/Superconductor Bilayer

2006-06-13

arxiv.org/abs/cond-mat/0606344v1

Phys. Rev. B 73, 224506 (2006)

Physics

Condensed Matter

Superconductivity

11 Pages, 11 Figures

Scientific paper

10.1103/PhysRevB.73.224506

The discrete vortex lattices in a ferromagnet/superconductor bilayer are studied when the ferromagnet has periodic stripe domains with an out-of-plane magnetization. The vortices are assumed to be situated periodically on chains in the stripe domains. Only up to two vortex chains per domain configurations are considered. When the domain period is fixed, the threshold magnetization is calculated at which the transition from the Meissner state to the mixed state occurs. When the domain period is not fixed, the equilibrium domain size and vortex positions are calculated, depending on the domain's magnetization and the domain wall energy. In equilibrium, the vortices in the neighbor domains are half-way shifted, while they are next to each other in the same domain.

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