Possible Origin for Oscillatory Superconducting Transition Temperature in Superconductor/Ferromagnet Multilayers

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.1857· OSTI ID:383311

Muehge, T; Garifyanov, N N; Goryunov, Y V; Khaliullin, G G; Tagirov, L R; Westerholt, K; Garifullin, I A; Zabel, H ^[1]

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1. 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, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COOPER PAIRS
IRON
LAYERS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MULTILAYERS
NIOBIUM
OSCILLATIONS
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE