A nonmonotonic dependence of the critical Josephson supercurrent on the injection current through a normal metal/ferromagnet weak link from a single domain ferromagnetic strip has been observed experimentally in nanofabricated planar crosslike S-N/F-S Josephson structures. This behavior is explained by 0–π and π–0 transitions, which can be caused by the suppression and Zeeman splitting of the induced superconductivity due to interaction between N and F layers, and the injection of spin-polarized current into the weak link. A model considering both effects has been developed. It shows the qualitative agreement between the experimental results and the theoretical model in terms of spectral supercurrent-carrying density of states of S-N/F-S structures and the spin-dependent double-step nonequilibrium quasiparticle distribution.

在纳米制造的平面十字形 SN/FS Josephson 结构中，通过实验观察到临界约瑟夫森超电流对通过来自单域铁磁条的正常金属/铁磁体弱连接的注入电流的非单调依赖性。这种行为可以用 0– π和π来解释–0 跃迁，这可能是由于 N 层和 F 层之间的相互作用引起的感应超导性的抑制和塞曼分裂，以及自旋极化电流注入薄弱环节引起的。已经开发了一个考虑这两种影响的模型。它显示了实验结果与理论模型在 SN/FS 结构的谱超载流态密度和自旋相关双步非平衡准粒子分布方面的定性一致性。