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Your search keyword '"Sidorenko, Anatoli S."' showing total 19 results
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19 results on '"Sidorenko, Anatoli S."'

1. In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures

Author

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

Subjects
Condensed Matter - Superconductivity, Quantum Physics
Abstract

Employment of the non-trivial proximity effect in superconductor/ferromagnet (S/F) heterostructures for the creation of novel superconducting devices requires accurate control of magnetic states in complex thin-film multilayers. In this work, we study experimentally in-plane transport properties of microstructured Nb/Co multilayers. We apply various transport characterization techniques, including magnetoresistance, Hall effect, and the first-order-reversal-curves (FORC) analysis. We demonstrate how FORC can be used for detailed in situ characterization of magnetic states. It reveals that upon reduction of the external field, the magnetization in ferromagnetic layers first rotates in a coherent scissor-like manner, then switches abruptly into the antiparallel state and after that splits into the polydomain state, which gradually turns into the opposite parallel state., Comment: arXiv admin note: text overlap with arXiv:2010.03454

Published
2022
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4. In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures

Author

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

Abstract

Employment of the non-trivial proximity effect in superconductor/ferromagnet (S/F) heterostructures for the creation of novel superconducting devices requires accurate control of magnetic states in complex thin-film multilayers. In this work, we study experimentally in-plane transport properties of microstructured Nb/Co multilayers. We apply various transport characterization techniques, including magnetoresistance, Hall effect, and the first-order-reversal-curves (FORC) analysis. We demonstrate how FORC can be used for detailed in situ characterization of magnetic states. It reveals that upon reduction of the external field, the magnetization in ferromagnetic layers first rotates in a coherent scissor-like manner, then switches abruptly into the antiparallel state and after that splits into the polydomain state, which gradually turns into the opposite parallel state. The polydomain state is manifested by a profound enhancement of resistance caused by a flux-flow phenomenon, triggered by domain stray fields. The scissor state represents the noncollinear magnetic state in which the unconventional odd-frequency spin-triplet order parameter should appear. The non-hysteretic nature of this state allows for reversible tuning of the magnetic orientation. Thus, we identify the range of parameters and the procedure for in situ control of devices based on S/F heterostructures.

Published
2021
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13. Towards the creation of SF metamaterials

Author

Khaydukov, Yu., Morari, Roman, Zdravkov, Vladimir I., Lenk, D., Merke, D., Seidlhofer, B.-K., Steitz, R., Müller, C., Krug von Nidda, Hans-Albrecht, Keller, T., Sidorenko, Anatoli S., Horn, Siegfried R., Tidecks, Reinhard, and Keimer, B.

Published
2019

18. Influence of strong disorder on superconductivity of MgB2 thin films

Author

Koch, Th., Zdravkov, Vladimir I., Surdu, A., Condrea, E., Socrovisciuc, A., Rossolenko, A. N., Ryazanov, V. V., Straumal, B., Tidecks, Reinhard, Wixforth, Achim, and Sidorenko, Anatoli S.

Subjects
TK7800-8360, Physics, QC1-999, Electronics
Abstract

We investigated the influence of disorder on superconductivity of MgB2 films, prepared in a single deposition run onto two different substrates: (100)-MgO and on (128° rot)-LiNbO3 with trigonal crystal structure which does not match to the MgB2 structure. As expected, the microstructure of both films crucially differs. The REM study shows a very homogeneous, smooth morphology of the MgB2 film on MgO, but a very rough inhomogeneous film structure on LiNbO3. Although the MgB2 film on LiNbO3 is strongly disordered, its critical temperature Tc=33.5 K is practically the same as for the film deposited on MgO. Possible reasons of such unusual Tc behavior are discussed.

Published
2008

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