Regensburg 2002 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 7: Postersitzung I: Anwendungen der Supraleitung (1-6), Dünne Schichten, Josephsonkontakte, SQUIDs (7-17), Neue und unkonv. Supraleiter(18-23), Amorphe- und Tunnelsyst. (24-28), Quantenflüssigkeiten (29-30), Syst. korr. Elektr.: Theorie I (31-45)
TT 7.15: Poster
Montag, 11. März 2002, 14:30–18:00, A
Quasi-onedimensional FFLO state in the Ni/Nb layered system — •Anatoli Sidorenko1,2, Christian Helbig1, Vladimir Zdravkov2, Yuansu Luo3, Matthias Schreck1, Lenar Tagirov4, and Reinhard Tidecks1 — 1Institut für Physik, Universität Augsburg, D-86159 Augsburg — 2Institute of Applied Physics, MD-2028 Kishinev, Moldova — 3I. Physikalisches Institut, Universität Göttingen, D-37073 Göttingen — 4Kazan State University, RU-420008 Kazan, Russia
Last decade superconductor/ferromagnet layered systems (S/F) were the subject of extensive studies to detect the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) nonuniform superconducting state with a non-zero total momentum and spatial variations of the pair amplitude. Further predictions of the possibility to observe the No-dq1D-FFLONo-dq state in S/F layered systems with oscillating dependence of Tc on the F-layer thickness, dF, stimulated intensive experimental studies of artificial S/F multilayers. Nevertheless, up to now only a few works manifest oscillating Tc(dF) dependence for S/F systems.
We prepared Nb/Ni bilayers by DC magnetron sputtering and observed a non-monotonic Tc(dNi) behavior with a deep minimum of Tc at small dNi. The role of various parameters of the S/F system governing the experimental realisation of the FFLO-state is discussed.
This work was partially supported by INTAS Grant No. 99-00585.