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26 papers · 1 filter
In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures
Olena M. Kapran, Roman Morari, Taras Golod +6
Employment of the non-trivial proximity effect in superconductor/ferromagnet (S/F) heterostructures for the creation of novel superconducting devices requires accurate control of m…
Design aspects of BiSrCaCuO THz sources: optimization of thermal and radiative properties
Mikhail M. Krasnov, Natalia D. Novikova, Roger Cattaneo +2
Impedance matching and heat management are important factors influencing performance of THz sources. In this work we analyze thermal and radiative properties of such devices based…
Accurate determination of the Josephson critical current by lock-in measurements
Razmik A. Hovhannisyan, Olena M. Kapran, Taras Golod +1
Operation of Josephson electronics usually requires determination of the Josephson critical current , which is affected both by fluctuations and measurement noise. Lock-in mea…
Crossover between short and long range proximity effects in SFS junctions with Ni-based ferromagnets
O. M. Kapran, T. Golod, A. Iovan +3
We study Superconductor/Ferromagnet/Superconductor junctions with CuNi, PtNi, or Ni interlayers. Remarkably, we observe that supercurrents through Ni can be significantly larger th…
Direct visualization of phase-locking of large Josephson junction arrays by surface electromagnetic waves
M. A. Galin, F. Rudau, E. A. Borodianskyi +5
Phase-locking of oscillators leads to superradiant amplification of the emission power. This is particularly important for development of THz sources, which suffer from low emissio…
Observation of the dominant spin-triplet supercurrent in Josephson spin valves with strong Ni ferromagnets
O. M. Kapran, A. Iovan, T. Golod +1
We study experimentally nanoscale Josephson junctions and Josephson spin-valves containing strong Ni ferromagnets. We observe that in contrast to junctions, spin valves with the sa…