• Development of superconducting structures with unique electromagnetic characteristics and the study of their physical properties...

MONTH OF POSTDOCS LECTURES 2016

29 March 2016

In the framework of MONTH OF POSTDOCS LECTURES 2016 PhD Ben Hamida Aymen and his scientific advisor Prof. Valery Ryazanov will give the lectures introducing their  joint scientific work in the laboratory for superconducting metamaterials.

Lectures will be  held on 18th of May, between 15:00 and 17:00, library.

  1. Valery V. Ryazanov: “Цифровая и квантовая сверхпроводящая электроника” (Russian language).
  2. Aymen Ben Hamida: “Ferromagnetic Josephson Junctions for superconducting cryogenic memories” (English language).

Abstract:

To realize novel elements of superconducting electronics and spintronics based on hybrid nano- and microstructures, a Josephson magnetic memory based on Josephson superconductor/ferromagnet/superconductor junction (SFS junction) is fabricated and investigated [1,2].  The first successful experiment detecting a perceptible supercurrent in an SFS structure was carried out in 1999 [3]. An application of small external magnetic field changes the magnetization of the ferromagnetic layer that in turn changes the junction critical current Ic, allowing the realization of two distinct states with high and low Ic, corresponding to logical “0” and “1” states, respectively.

In this lecture, a quick review of Josephson magnetic memories will be given as well as new results on multilayered Josephson SIsFS structures, with a tunneling barrier (I) and a thin superconducting layer (s), namely Nb-Al/AlOx-Nb-Pd0.99Fe0.01-Nb junctions.
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[1] V. V. Bolginov, V. S. Stolyarov, D. S. Sobanin, A. L. Kar-povich, and V. V. Ryazanov, JETP Lett. 95, 366 (2012).

[2] V. V. Ryazanov, V. V. Bolginov, D. S. Sobanin, I. V. Vernik, S. K. Tolpygo, A. M. Kadin, and O. A. Mukhanov, Physics Procedia 36, 35 (2012).

[3] V. V. Ryazanov, Phys. Usp. 42, 825 (1999).

Lectures will be held in the unique scientific and popular format. Everyone is welcome!

Learn more about MONTH OF POSTDOCS LECTURES 2016

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PhD Ben Hamida Ayman, MONTH OF POSTDOCS LECTURES 2015

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Prof. Dr. Valery Ryazanov, MONTH OF POSTDOCS LECTURES 2015

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