Abstract
We performed a comparative study of magnetic proximity effects in [Gd(5nm)/Nb(25nm)]12 and [Cu30Ni70(6nm)/Nb(27nm)]12 superlattices of S/F type by means of transport measurements and neutron scattering. Transport measurements have shown that Gd/Nb and CuNi/Nb superlattices shows 3D and 2D type of superconductivity respectively. In the case of proximity coupled Gd/Nb superconductor the effective thickness of the superconducting region, 300nm is enough to expel significant amount of applied magnetic field which was detected by neutron scattering. In decoupled CuNi/Nb superlattice thickness of every superconducting layer is only 27nm which is not enough to expel applied magnetic field. Our study shows how neutron reflectometry can be applied to study proximity coupling in superconducting/ferromagnet heterostructures.
Highlights
IOP PublishingY Khaydukov, E Kravtsov, R Morari, D Lenk, L Mustafa, G Kim, M Trapp, V Zhaketov, V Proglyado, V Zrdavkov, Y Nikitenko, H-A Krug von Nidda, T Keller, R Steitz, R Tideks, A Sidorenko, V Ustinov, V Aksenov and B Keimer
Artificial superconducting/ferromagnet (S/F) heterostructures are attracting nowadays great attention due to rich proximity effect physics arising in them [1,2,3,4,5,6,7,8]
Discussions and conclusion transport measurements show that despite of similar thickness of F layer the Gd/Nb and CuNi/Nb SLs are of different type of superconductivity: the Gd/Nb is 3D and CuNi/Nb is 2D superconductor
Summary
Y Khaydukov, E Kravtsov, R Morari, D Lenk, L Mustafa, G Kim, M Trapp, V Zhaketov, V Proglyado, V Zrdavkov, Y Nikitenko, H-A Krug von Nidda, T Keller, R Steitz, R Tideks, A Sidorenko, V Ustinov, V Aksenov and B Keimer.
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