ИСТИНА

Superconducting spintronics has emerged in the last decade as a promising new field that seeks to open a new dimension for nanoelectronics by utilizing the internal spin structure of the superconducting Cooper pair as a new degree of freedom. Currently, the discipline finds itself at the crossroads for developing first-generation devices. One of the main elements of superconducting spintronics is the superconducting spin valve. For ideal operation of such device, the in-plane supercurrent in the superconducting layer can be controlled by the mutual orientation of magnetization of the ferromagnetic layers. In 1999 the superconducting spin-valve was proposed theoretically, comprising a superconducting (S) spacer layer separating two ferromagnetic (F) layers. For ideal operation, the in-plane supercurrent in the S layer can be controlled by the mutual orientation of magnetization in the F layers. Initially the spin-valve effect was observed as a dependence of the critical temperature (Tc) on the magnetic configuration, parallel (P) or antiparallel (AP) in such structures. However, the Tc change between collinear and perpendicular configuration may be much more pronounced than between P and AP alignment in a case of a strongly spin-polarized ferromagnet due to appearance of the new channel for drainage of Cooper pairs from the S to the F layers related to appearance of the long-range triplet superconducting correlations (LRTC). We have developed different models for the description of superconducting spin valves with the proximity effect between a usual low-Tc superconductor and different types of ferromagnets. I will also discuss the effect of remote magnetization appearance, which was found recently in SFF spin-valves. Such spin-valves may serve as magnetic sensors or building blocks of spintronic devices.