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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 1 Issue 4 (1998) pp 405-407
Proximity effect in Fe/Pb/Fe trilayers
N.N. Garif'yanov (1), Y.V. Goryunov (1), T. Mühge (2) (a), L. Lazar (2), G.G. Khaliullin (3) (b), K. Westerholt (2), I.A. Garifullin (1), H. Zabel (2)
(1) Kazan Physicotechnical Institute, Russian Academy of Sciences, 420029 Kazan, Russian Federation
(2) Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany
(3) Max-Planck-Institut für Physik Komplexer Systeme, 01187 Dresden, Germany
Received: 30 June 1997 / Revised: 20 August 1997 / Accepted: 16 December 1997
Abstract: We have studied superconducting and magnetic properties of sputtered Fe/Pb/Fe-trilayers. For a fixed Pb thickness $d_{\rm Pb}$ and with changing Fe thickness, $d_{\rm Fe}$, a monotonic decrease of the superconducting transition temperature $T_{\rm c}$ was observed. Magnetization measurements clearly showed that Fe remains ferromagnetic down to the monolayer range. A quantitative comparison of $T_{\rm c}(d_{\rm Fe})$ with the theory of pair breaking by the exchange field reveals that the observed $T_{\rm c}$-suppression by the ferromagnetic Fe-layer is much weaker than expected. Possible reasons for the reduced $T_{\rm c}$-suppression in this system are discussed.
PACS. 74.80.Dm Superconducting layer structures: superlattices, heterojunctions, and multilayers - 74.50.+r Proximity effects, weak links, tunneling phenomena, and Josephson effects - 74.62.-c Transition temperature variations
(a) email: muehge@spin.ep4.ruhr-uni-bochum.de
(b) Permanent address: Kazan Physicotechnical Institute, Russian Academy of Sciences, 420029 Kazan, Russian Federation.
Online publication: March 19, 1998
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