Controlled Injection of Spin-Triplet Supercurrents into a Strong Ferromagnet
Controlled Injection of Spin-Triplet Supercurrents into a Strong Ferromagnet
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DOI：
10.1126/science.1189246
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发表时间：
2010-07-02
期刊：
影响因子：
56.9
通讯作者：
Blamire, M. G.
中科院分区：
文献类型：
--
作者：
Robinson, J. W. A.;Witt, J. D. S.;Blamire, M. G.
超导体-铁磁体邻近效应描述了源于超导体的自旋单重态超电流在进入相邻铁磁体后的快速衰减。在两者之间的界面放置一个锥形磁铁（钬）后，我们在铁磁层中检测到了一个长距离的超电流。长程效应需要特定厚度的螺旋磁有序钬，与自旋三重态邻近理论一致。这使得通过调整钬注入器厚度的磁不均匀性程度来控制电子对对称性成为可能。
The superconductor-ferromagnet proximity effect describes the fast decay of a spin-singlet supercurrent originating from the superconductor upon entering the neighboring ferromagnet. After placing a conical magnet (holmium) at the interface between the two, we detected a long-ranged supercurrent in the ferromagnetic layer. The long-range effect required particular thicknesses of the spiral magnetically ordered holmium, consistent with spin-triplet proximity theory. This enabled control of the electron pairing symmetry by tuning the degree of magnetic inhomogeneity through the thicknesses of the holmium injectors.