Reentrance phenomenon in superconductor/ferromagnet nanostructures and their application in superconducting spin valves for superconducting electronics

Sidorenko Anatolie

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SIDORENKO, Anatolie. Reentrance phenomenon in superconductor/ferromagnet nanostructures and their application in superconducting spin valves for superconducting electronics. In: Low Temperature Physics, 2017, vol. 43, pp. 766-771. ISSN 1063-777X. DOI: https://doi.org/10.1063/1.4995623

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Low Temperature Physics

Volumul 43 / 2017 / ISSN 1063-777X

Reentrance phenomenon in superconductor/ferromagnet nanostructures and their application in superconducting spin valves for superconducting electronics

DOI:https://doi.org/10.1063/1.4995623

Pag. 766-771

Sidorenko Anatolie¹²

¹ Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova,
² University of Augsburg

Disponibil în IBN: 7 septembrie 2018

Rezumat

In superconductor/ferromagnet layered structures, a Fulde-Ferrell-Larkin-Ovchinnikov-like inhomogeneous superconducting pairing give rise. The singlet and zero-projection triplet components of the pairing oscillate in space, and the presence of interfaces causes interference phenomena. As the result of the interference, the super-conducting critical temperature T_c oscillates as a function of the ferromagnetic layer thicknesses or, even more spectacular, reentrant superconductivity appears. Two ferromagnetic layers can be combined with a superconducting layer into a superconducting spin valve. Proper design and choice of the material parameters give possibility to control superconducting T_c manipulating with magnetic configurations in the system. The conditions to get large spin-valve effect, i.e., a large shift in the critical temperature, are reviewed in the article.

Cuvinte-cheie
Ferromagnetic materials, ferromagnetism, Magnetoresistance, Superconducting materials, temperature

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