Possible Origin for Oscillatory Superconducting Transition Temperature in Superconductor/Ferromagnet Multilayers
- Institut fuer Experimentalphysik--Festkoerperphysik, Ruhr-Universitaet Bochum, 44780 Bochum (Germany)
We have studied superconducting and magnetic properties of sputtered Fe/Nb/Fe trilayers. For a fixed Nb thickness and with changing Fe thickness, {ital d}{sub Fe}, a nonmonotonic behavior of the superconducting transition temperature {ital T}{sub {ital c}} was observed with a maximum at {ital d}{sub Fe}{approx_equal}10 A. The analysis of the magnetization data revealed that for {ital d}{sub Fe}{le}7 A the Fe layer is nonmagnetic. The interpretation of the observed {ital T}{sub {ital c}} behavior is attributed to the existence of this magnetically {open_quote}{open_quote}dead{close_quote}{close_quote} layer and the change of the interaction of the Cooper pairs with this layer at the onset of ferromagnetism for {ital d}{sub Fe}{ge}7 A. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 383311
- Journal Information:
- Physical Review Letters, Vol. 77, Issue 9; Other Information: PBD: Aug 1996
- Country of Publication:
- United States
- Language:
- English
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