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arXiv · 2010.03454

Transport characterization of magnetic states in Superconductor/Ferromagnet Nb/Co multilayers

Olena M. Kapran·Roman Morari·Taras Golod·Evgenii A. Borodianskyi·Vladimir Boian·Andrei Prepelita·Nikolay Klenov·Anatoli Sidorenko·Vladimir M. Krasnov
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Abstract

Employment of the non-trivial proximity effect in Superconductor/Ferromagnet (S/F) heterostructures for creation of novel superconducting devices requires an accurate control of magnetic states in complex thin-film multilayers composing such devices. In this work we study experimentally in-plane transport properties of micro-structured Nb/Co multilayers. We apply various experimental techniques for characterization of multilayers, including the anisotropic magnetoresistance, the Hall effect and the first-order-reversal-curves analysis. We demonstrate that a combination of those techniques can provide a detailed knowledge of the magnetic state of the multilayer. In particular, we identify the range of existence of the coherently rotating, monodomain scissor-like state. It is anticipated, that in this noncollinear magnetic state the unconventional odd-frequency spin-triplet order parameter should appear. The non-hystertic nature of this state allows reversible tuning of the magnetic orientation. Thus, we identify the range of parameters and the procedure for controllable operation of devices based on such S/F heterostructures.

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Olena M. Kapran, Roman Morari, Taras Golod, Evgenii A. Borodianskyi, Vladimir Boian, Andrei Prepelita, Nikolay Klenov, Anatoli Sidorenko, Vladimir M. Krasnov. 2020-10-07. Transport characterization of magnetic states in Superconductor/Ferromagnet Nb/Co multilayers. https://doi.org/10.3762/bjnano.12.68

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