Gillijns W, Aladyshkin A Yu, Lange M, Van Bael M J, Moshchalkov V V
INPAC-Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism Group, K.U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
Phys Rev Lett. 2005 Nov 25;95(22):227003. doi: 10.1103/PhysRevLett.95.227003. Epub 2005 Nov 21.
Domain-wall superconductivity is studied in a superconducting Nb film placed between two ferromagnetic Co/Pd multilayers with perpendicular magnetization. The parameters of top and bottom ferromagnetic films are chosen to provide different coercive fields, so that the magnetic domain structure of the ferromagnets can be selectively controlled. From the dependence of the critical temperature Tc on the applied magnetic field H, we have found evidence for domain-wall superconductivity in this three-layered F/S/F structure for different magnetic domain patterns. The phase boundary, calculated numerically for this structure from the linearized Ginzburg-Landau equation, is in good agreement with the experimental data.
在置于两个具有垂直磁化方向的铁磁Co/Pd多层膜之间的超导Nb薄膜中研究了畴壁超导性。选择顶部和底部铁磁薄膜的参数以提供不同的矫顽场，从而可以选择性地控制铁磁体的磁畴结构。从临界温度Tc对施加磁场H的依赖性，我们发现了在这种三层F/S/F结构中不同磁畴图案下畴壁超导性的证据。根据线性化金兹堡-朗道方程对该结构进行数值计算得到的相边界与实验数据吻合良好。
