129 citations · 407 across the 13 of their papers we have counts for
13 papers
Chirality of Bloch domain walls in exchange biased CoO/Co bilayer seen by waveguide-enhanced neutron spin-flip scattering
Yu. Khaydukov, D. Lenk, V. Zdravkov +7
Magnetic state of exchanged biased CoO(20nm)/Co() bilayer (=5-20nm) was studied by means of polarized neutron reflectometry. By spacing of CoO/Co bilayer and AlO…
Magnetic state of Nb(1-7nm)/CuNi(6nm) superlattices revealed by Polarized Neutron Reflectometry and SQUID magnetometry
Yu. Khaydukov, R. Morari, D. Lenk +11
We report results of a magnetic characterization of [CuNi(6nm)] (x=1-7nm) superlattices using Polarized Neutron Reflectometry (PNR) and SQUID magnetometry. The…
Influence of the FFLO-like State on the Upper Critical Field of a S/F Bilayer: Angular and Temperature Dependence
D. Lenk, M. Hemmida, R. Morari +9
We investigated the upper critical magnetic field, , of a superconductor-ferromagnet (S/F) bilayer of Nb/CuNi and a Nb film (as reference). We obtained the dep…
STM study of the preparation of clean Ta(110) and the subsequent growth of two-dimensional Fe islands
Thomas Eelbo, Vladimir Zdravkov, Roland Wiesendanger
This report deals with the preparation of a clean Ta(110) surface, investigated by means of scanning tunneling microscopy/spectroscopy as well as by low-energy electron diffraction…
Memory Effect and Triplet Pairing Generation in the Superconducting Exchange Biased Co/CoOx/Cu41Ni59/Nb/Cu41Ni59 Layered Heterostructure
V. I. Zdravkov, D. Lenk, R. Morari +8
We fabricated a nanolayered hybrid superconductor-ferromagnet spin-valve structure, the resistive state of which depends on the preceding magnetic field polarity. The effect is bas…
Reentrant Superconductivity and Superconducting Critical Temperature Oscillations in F/S/F trilayers of Cu41Ni59/Nb/Cu41Ni59 Grown on Cobalt Oxide
V. I. Zdravkov, J. Kehrle, D. Lenk +9
Ferromagnet/Superconductor/Ferromagnet (F/S/F) trilayers constitute the core of a superconducting spin valve. The switching effect of the spin valve is based on interference phenom…
Experimental and theoretical analysis of the upper critical field in FSF trilayers
E. Antropov, Mikhail S. Kalenkov, J. Kehrle +10
The upper critical magnetic field H_{c2} in thin-film FSF trilayer spin-valve cores is studied experimentally and theoretically in geometries perpendicular and parallel to the hete…
Observation of the Triplet Spin-Valve Effect in a Superconductor-Ferromagnet Heterostructure
V. Zdravkov, J. Kehrle, G. Obermeier +7
The theory of superconductor-ferromagnet (S-F) heterostructures with two ferromagnetic layers predicts the generation of a long-range, odd-in-frequency triplet pairing at non-colli…
Critical Temperature Oscillations and Reentrant Superconductivity due to the FFLO like State in F/S/F Trilayers
J. Kehrle, V. I. Zdravkov, G. Obermeier +8
Ferromagnet/Superconductor/Ferromagnet (F/S/F) trilayers, in which the establishing of a Fulde-Ferrell Larkin-Ovchinnikov (FFLO) like state leads to interference effects of the sup…
Interference Effects of the Superconducting Pairing Wave Function due to the Fulde-Ferrell-Larkin-Ovchinnikov like State in Ferromagnet/Superconductor Bilayers
V. I. Zdravkov, J. Kehrle, G. Obermeier +10
The theoretical description of the Fulde-Ferrell-Larkin-Ovchinnikov like state establishing in nanostructered bilayers of ferromagnetic (F) and superconducting (S) material leads t…
Reentrant superconductivity in superconductor/ferromagnetic-alloy bilayers
V. I. Zdravkov, J. Kehrle, G. Obermeier +13
We studied the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state establishing due to the proximity effect in superconducting Nb/Cu41Ni59 bilayers. Using a special wedge-type depos…
Re-entrant superconductivity in Nb/Cu(1-x)Ni(x) bilayers
V. Zdravkov, A. Sidorenko, G. Obermeier +6
We report on the first observation of a pronounced re-entrant superconductivity phenomenon in superconductor/ferromagnetic layered systems. The results were obtained using a superc…
Thermally Assisted Flux Flow in MgB2 : Strong Magnetic Field Dependence of the Activation Energy
A. Sidorenko, V. Zdravkov, V. Ryazanov +6
The origin of the resistive transition broadening for MgB2 thin films was investigated. Thermally activated flux flow is found to be responsible for the resistivity contribution in…