Re-entrant superconductivity in the superconductor/ferromagnet V/Fe layered system
I. A. Garifullin, D. A. Tikhonov, N. N. Garif’yanov, L. Lazar, Yu. V. Goryunov, S. Ya. Khlebnikov, L. R. Tagirov, K. Westerholt, H. Zabel
DOI 10.1103/PhysRevB.66.020505 · Physical Review B
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Abstract
We study the superconducting properties of a series of Fe/V/Fe trilayers with variable thickness of the Fe layer and constant thickness of the V layer. For an optimized combination of thicknesses and structural quality of the thin films we observe a re-entrant behavior of the superconducting state when plotting the superconducting transition temperature Tc as a function of the Fe thickness dFe. With increasing dFe, Tc drops sharply up to dFe≃8 Å, then the superconductivity disappears, and it restores again at dFe>~12 Å.
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