Dipartimento di Fisica "E.R. Caianiello", Università di Salerno, I-84084 Fisciano (SA), Italy and CNR-SPIN Salerno, I-84084 Fisciano (SA), Italy.
Phys Rev Lett. 2013 Nov 27;111(22):226801. doi: 10.1103/PhysRevLett.111.226801. Epub 2013 Nov 25.
We study a spin valve with a triplet superconductor spacer intercalated between two ferromagnets with noncollinear magnetizations. We show that the magnetoresistance of the triplet spin valve depends on the relative orientations of the d vector, characterizing the superconducting order parameter, and the magnetization directions of the ferromagnetic layers. For devices characterized by a long superconductor, the effects of a polarized current sustained by Cooper pairs only are observed. In this regime, a supermagnetoresistance effect emerges, and the chiral symmetry of the order parameter of the superconducting spacer is easily recognized. Our findings open new perspectives in designing spintronics devices based on the cooperation of ferromagnetic and triplet correlations.
我们研究了一种自旋阀，其中一个三进制超导体间隔物夹在两个非共线磁化的铁磁体之间。我们表明，三进制自旋阀的磁电阻取决于 d 向量的相对取向，该向量表征超导有序参数和铁磁层的磁化方向。对于由长超导体表征的器件，观察到仅由库珀对维持的极化电流的效应。在该区域中，出现了超磁电阻效应，并且很容易识别超导间隔物的有序参数的手征对称性。我们的发现为基于铁磁和三进制相关合作的自旋电子学器件的设计开辟了新的前景。
