24 citations · 205 across the 51 of their papers we have counts for
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Magnetic properties of artificially prepared ordered two-dimensional shunted and unshunted Nb-AlO_x-Nb Josephson Junction Arrays
F. M. Araujo-Moreira, S. Sergeenkov
In this Chapter, we present our latest experimental results (along with their theoretical interpretation) related to some unusual magnetic properties of artificially prepared order…
Elastic properties of polycrystalline YBa_2Cu_3O_7: Evidence for granularity induced martensitic behavior
C. Stari, A. Moreno-Gobbi, A. W. Mombru +4
In this work we present the study of the elastic properties of polycrystalline samples of superconducting YBa_2Cu_3O_7 prepared by the sol-gel method. The quality of all samples wa…
Chemically Induced Nanoscale Josephson Effects in Non-Stoichiometric High-Temperature Superconductors
Sergei Sergeenkov
This paper reviews some of the recently suggested (by the author) novel effects expected to occur in intrinsically granular non-stoichiometric material modeled by 2D Josephson junc…
Magnetic field induced polarization effects in intrinsically granular superconductors
Sergei Sergeenkov
Based on the previously suggested model of nanoscale dislocations induced Josephson junctions and their arrays, we study the magnetic field induced electric polarization effects in…
On the origin of reentrance in 2D Josephson Junction Arrays
F. M. Araujo-Moreira, W. Maluf, S. Sergeenkov
A comparative study of the magnetic properties of shunted and unshunted two-dimensional Josephson junction arrays (2D-JJA) is presented. Using a single-plaquette approximation of t…
Influence of nonuniform critical current density profile on magnetic field behavior of AC susceptibility in 2D Josephson Junction Arrays
F. M. Araujo-Moreira, W. Maluf, S. Sergeenkov
Employing mutual-inductance measurements we study the magnetic field dependence of complex AC susceptibility of artificially prepared highly ordered (periodic) two-dimensional Jose…
Higher harmonics of ac voltage response in narrow strips of YBa2Cu3O7 thin films: Evidence for strong thermal fluctuations
J. G. Ossandon, S. Sergeenkov, P. Esquinazi +1
We report on measurements of higher harmonics of the ac voltage response in strips of YBa2Cu3O7 thin films as a function of temperature, frequency and ac current amplitude. The thi…
Manifestation of geometric quantization effects in temperature behavior of AC magnetic response of Josephson Junction Arrays
S. Sergeenkov, F. M. Araujo-Moreira
By improving resolution of home-made mutual-inductance measurements technique, a pronounced step-like structure (with the number of steps n=4 for all AC fields) has been observed i…