Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 55: Poster Session: Superconductivity 2

TT 55.4: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P2-OG3

Investigation of Superconducting Proximity and Magnetic Stray Field Effects in Superconductor/Ferromagnet Heterostructures — •Vladimir I. Zdravkov^1,2, Daniel Lenk¹, Roman Morari², Zakir Seidov³, Yury Khaydukov⁴, Aladin Ullrich¹, Günter Obermeier¹, Claus Müller¹, Anatoli S. Sidorenko², Hans-Albrecht Krug von Nidda¹, Siegfried Horn¹, Lenar R. Tagirov^1,5, and Reinhard Tidecks¹ — ¹Institut für Physik, Universität Augsburg, D-86159 Augsburg, Germany — ²D. Ghitsu Institute of Electronic Engineering and Nanotechnologies ASM, MD2028 Kishinev, Moldova — ³Institute of Physics, Azerbaijan National Academy of Sciences, AZ-1143 Baku, Azerbaijan — ⁴Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany — ⁵E.K. Zavoisky Physical-Technical Institute of RAS, 420029 Kazan, Russia

We have experimentally studied Nb/Cu₄₁Ni₅₉/nc−Nb/Co/CoO_x superconducting spin-triplet spin-valve structures. Due to the proximity effect between the superconductor and the ferromagnets, these structures show a superconducting transition temperature depending on the magnetic configuration of the ferromagnetic layers. Thus, the transition temperatures depend on the magnetic history of the samples, yielding functionality as spin-valves. We observed characteristic features in the magnetoresistance associated with different types of superconducting spin valve effects. To clarify possible influences of stray field effects from Co, we investigate the magnetoresistance of Nb/Si/Co/CoO_x systems.