124 citations · 747 across the 18 of their papers we have counts for
18 papers
Cherenkov radiation of spin waves by ultra-fast moving magnetic flux quanta
O. V. Dobrovolskiy, Q. Wang, D. Yu. Vodolazov +5
Despite theoretical predictions for a Cherenkov-type radiation of spin waves (magnons) by various propagating magnetic perturbations, fast-enough moving magnetic field stimuli have…
Engineered magnetization and exchange stiffness in direct-write Co-Fe nanoelements
S. A. Bunyaev, B. Budinska, R. Sachser +10
Media with engineered magnetization are essential building blocks in superconductivity, magnetism and magnon spintronics. However, the established thin-film and lithographic techni…
Spin-wave spectroscopy of individual ferromagnetic nanodisks
O. V. Dobrovolskiy, S. A. Bunyaev, N. R. Vovk +8
The increasing demand for ultrahigh data storage densities requires development of 3D magnetic nanostructures. In this regard, focused electron beam induced deposition (FEBID) is a…
Ultra-fast vortex motion in dirty Nb-C superconductor with a close-to-perfect edge barrier
O. V. Dobrovolskiy, D. Yu. Vodolazov, F. Porrati +5
The ultra-fast dynamics of superconducting vortices harbors rich physics generic to nonequilibrium collective systems. The phenomenon of flux-flow instability (FFI), however, preve…
Upper frequency limits for vortex guiding and ratchet effects
O. V. Dobrovolskiy, E. Begun, V. M. Bevz +2
Guided and rectified motion of magnetic flux quanta are important effects governing the magneto-resistive response of nanostructured superconductors. While at low ac frequencies th…
Supersonic dynamics of guided magnetic flux quanta
O. V. Dobrovolskiy, V. M. Bevz, E. Begun +3
The dynamics of Abrikosov vortices in superconductors is usually limited to vortex velocities km/s above which samples abruptly transit into the normal state. In the Lar…
Spin-wave phase inverter upon a single nanodefect
O. V. Dobrovolskiy, R. Sachser, S. A. Bunyaev +9
Local modification of magnetic properties of nanoelements is a key to design future-generation magnonic devices, in which information is carried and processed via spin waves. One o…
Magnon-Fluxon interaction in a ferromagnet/superconductor heterostructure
O. V. Dobrovolskiy, R. Sachser, T. Brächer +7
Ferromagnetism and superconductivity are most fundamental phenomena in condensed matter physics. Entailing opposite spin orders, they share an important conceptual similarity: Dist…
Reduction of microwave loss by mobile fluxons in grooved Nb films
O. V. Dobrovolskiy, R. Sachser, V. M. Bevz +6
In the mixed state of type II superconductors penetrated by an external magnetic field in the form of a lattice of Abrikosov vortices the dc resistance is known to increase with in…
Microwave emission from superconducting vortices in Mo/Si superlattices
O. V. Dobrovolskiy, V. M. Bevz, M. Yu. Mikhailov +6
Most of superconductors in a magnetic field are penetrated by a lattice of quantized flux vortices. In the presence of a transport current causing the vortices to cross sample edge…
Radiofrequency generation by coherently moving fluxons
Oleksandr V. Dobrovolskiy, Roland Sachser, Michael Huth +4
A lattice of Abrikosov vortices in type II superconductors is characterized by a periodic modulation of the magnetic induction perpendicular to the applied magnetic field. For a co…
Fabrication of FeSi and Fe3Si compounds by electron beam induced mixing of [Fe/Si]2 and [Fe3/Si]2 multilayers grown by focused electron beam induced deposition
F. Porrati, R. Sachser, G. C. Gazzadi +2
Fe-Si binary compounds have been fabricated by focused electron beam induced deposition by the alternating use of iron pentacarbonyl, Fe(CO)5, and neopentasilane, Si5H12 as precurs…
Post-growth purification of Co nanostructures prepared by focused electron beam induced deposition
Evgeniya Begun, Oleksandr V. Dobrovolskiy, Maksym Kompaniiets +4
In the majority of cases nanostructures prepared by focused electron beam induced deposition (FEBID) employing an organometallic precursor contain predominantly carbon-based ligand…
Tunable magnetism on the lateral mesoscale by post-processing of Co/Pt heterostructures
Oleksandr V. Dobrovolskiy, Maksym Kompaniiets, Roland Sachser +4
Controlling magnetic properties on the nm-scale is essential for basic research in micro-magnetism and spin-dependent transport, as well as for various applications such as magneti…
Evidence for universal conductance correction in a tunable strongly coupled nanogranular metal
Roland Sachser, Fabrizio Porrati, Christian H. Schwalb +1
We present temperature-dependent conductivity data obtained on a sample set of nanogranular Pt-C with finely tuned inter-grain tunnel coupling strength g. For samples in the strong…
Magnetotransport properties of iron microwires fabricated by focused electron beam induced autocatalytic growth
F. Porrati, R. Sachser, M. -M. Walz +4
We have prepared iron microwires in a combination of focused electron beam induced deposition (FEBID) and autocatalytic growth from the iron pentacarbonyl, Fe(CO)5, precursor gas u…
Influence of the substrate-induced strain and irradiation disorder on the Peierls transition in TTF-TCNQ microdomains
Vita Solovyeva, Anastasia Cmyrev, Roland Sachser +1
The influence of the combined effects of substrate-induced strain, finite size and electron irradiation-induced defects have been studied on individual micron-sized domains of the…
Transient electrical conductivity of W-based electron beam induced deposits during growth, irradiation and exposure to air
F. Porrati, R. Sachser, M. Huth
W-based granular metals have been prepared by electron beam induced deposition from the tungsten-hexacarbonyl W(CO)6 precursor. In situ electrical conductivity measurements have be…