Figure - available from: Applied Physics Letters
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![(a) Scheme of the experimental configuration relating the θ-angle between the film plane and the direction of the applied field. The red in-plane arrow identifies the direction of the transport electric current density. The Δ T C θ curves determined for a field of 1.5 T and obtained from the R(T, θ) curves are shown for the Nb(20)/Pt [Fig. 3(b)] and Nb(20)/Cu [Fig. 3(c)] nanohybrids. Dashed red and blue lines are guides to the eyes.](publication/380949247/figure/fig3/AS:11431281289688907@1731350233183/a-Scheme-of-the-experimental-configuration-relating-the-th-angle-between-the-film-plane.jpg)
(a) Scheme of the experimental configuration relating the θ-angle between the film plane and the direction of the applied field. The red in-plane arrow identifies the direction of the transport electric current density. The Δ T C θ curves determined for a field of 1.5 T and obtained from the R(T, θ) curves are shown for the Nb(20)/Pt [Fig. 3(b)] and Nb(20)/Cu [Fig. 3(c)] nanohybrids. Dashed red and blue lines are guides to the eyes.
Source publication
Nb/Pt and Nb/Cu nanohybrids were sputtered on Si(100) substrate and systematically studied by transmission electron microscopy and magneto-transport measurements. Our experimental findings show that the colossal spin-valve effect measured in a hybrid formed by thick Pt layers deposited on Nb films is absent in equivalent Nb/Cu nanohybrids. In the l...
Citations
The role of spin orbit interaction in superconducting proximity effect is an area of intense research effort. Recent theoretical and experimental works investigate the possible role of spin–orbit interaction in generating spin-triplet pair correlations. In this work, we present an experimental survey of thin normal metal–superconductor–normal metal trilayers with Nb superconductor and Al, Ti, Cu, Pt, Ta, and Au normal metals, along with single layers of Nb as reference. We aim to probe the role of spin–orbit interaction and resistivity on the normal metal proximity effect through measurements of the upper critical field. We find that the upper critical fields of the trilayers are lower than that of a single layer Nb reference sample, and that the trilayers with higher resistivity metals, Ti, Pt, and Ta, behave as 2-dimensional superconductors. At low applied in-plane magnetic fields and temperatures close to the zero field transition temperature, we find a possible deviation from 2-dimensional to 3-dimensional behavior in the Ti and Pt trilayers. We also find that compared to single layer Nb films, all of our trilayers show a greater suppression of critical temperature during rotation from an in-plane to an out-of-plane applied magnetic field, with the greatest suppression observed in trilayers with Au or Al. This suppression of the critical temperature under field rotation might appear analogous to the colossal spin valve effect that can be achieved in systems with ferromagnetic materials; however, in our trilayers, only conventional orbital screening contributions to the suppression are present and the additional suppression is not present in the absence of applied magnetic field.
