The proximity effect in the few-layered hybrid ferromagnet/superconductor nanostructures and a possibility of creation of data controlling nanodevices

Yu. N. Proshin ; I. I. Popov ; R. G. Luchkin ; M. G. Khusainov

Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 149 (2007) no. 3, pp. 49-70

Résumé

The creation of spin switches based on the proximity effect for layered nanostructures ferromagnetic metal/superconductor (F/S) is reviewed. The phase diagrams of both few-layered hybrid nanostructures F/S and superlattices F/S are analyzed. It is shown that the four-layered nanostructure F/S/F$'$/S$'$ can possess different critical temperatures and critical fields for the neighboring S layers. By the optimal set of parameters, this system has the greatest amount of possible states in comparison with previously investigated layered F/S nanostructures. Due to this reason, four-layered nanostructure F/S/F$'$/S$'$ is the most perspective candidate for usage in superconducting spin nanoelectronics (spintronics). The conceptual scheme of data controlling and recording device with superconducting and magnetic channels in a common sample is proposed. The superconducting and magnetic properties can be separately managed by weak magnetic field.

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