The proximity effect in an Fe-Cr-V-Cr-Fe system |
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| Authors: | I A Garifullin D A Tikhonov N N Garif’yanov M Z Fattakhov L R Tagirov K Theiz-Bröhl K Westerholt H Zabel |
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| Institution: | 1.Kazan Physicotechnical Institute, Kazan Scientific Center,Russian Academy of Sciences,Kazan, Tatarstan,Russia;2.Kazan State University,Kazan, Tatarstan,Russia;3.Institut für Experimentalphysik/Fesk?rperphysik,Runr-Universit?t Bochum,Bochum,Germany |
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| Abstract: | The proximity effect was studied in a thin-film Fe-Cr-V-Cr-Fe layered system. As the chromium layer thickness (dCr) increases at a fixed thickness of iron layers (dFe), the dependence of the superconducting transition temperature (Tc) on dCr exhibits a maximum at dCr ? 40 Å followed by a sharp decrease. Investigation of the dependence of Tc on dFe at a fixed dCr showed that the depth of penetration of the Cooper pairs into a chromium layer does not exceed 40 Å. Analysis of the results obtained suggests that, at dCr ? 40 Å, chromium layers exhibit the transition from a nonmagnetic state to an incommensurate spin density wave state. |
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