Nano-Fluxonics lab


Assoc. Prof. Priv.-Doz. Dr. habil. Oleksandr  V. Dobrovolskiy, D. Sci. (KhNU)                     

M.Sci. in Physics, V. Karazin Kharkiv National University (KhNU), Ukraine, 2005; PhD,
B. Verkin Institute for Low Temperature Physics and Engineering (ILTPE), Ukraine, 2009; 
Postdoctoral researcher, Goethe University Frankfurt 2009-10; Principal investigator (PI), DFG 
project, 2011-15, Management Committee (MC) member COST Action MP1201 "NanoSC“, 
2012-16; Habilitation in Physics, Goethe University Frankfurt, 2016; D.Sci. in Physics and 
Mathematics, B. Verkin ILTPE, Ukraine; Privatdozent since 2016; Assoc. Prof. since 2017;  
PI, DFG project, 2017-19; MC member COST Action MP16218 "NanoCoHybri“, 2017-21;
80+ publications incl. 3 book chapters and 3 reviews; member of the research group 
"Thin Films and Nanostructures" of Prof. Dr. Michael Huth

Current research projects

Enhancing speed limits to the Abrikosov vortex dynamics, DFG 1511/3-1, No. 374052683, 2017-2019
Nanoscale coherent hybrid devices for superconducting quantum technologies, COST Action CA16218, 2017-2021
Magnonics, Interactions and Complexity - MagIC (KhNU), H2020-MSCA-RISE-2014, No. 644348, 2015-2019
Spin+X - collaboration with Nano-Magnonics group of Jun.-Prof. Dr. habil. Andrii Chumak within SFB/TRR 173 B04

Publications since 2017


1. Route to form skyrmions in soft magnetic films
D. Navas, R.V. Verba, A. Hierro-Rodriguez, S. A. Bunyaev, X. Zhou, A.O. Adeyeye,
O. V. Dobrovolskiy, B.A. Ivanov, K. Yu. Guslienko, and G. N. Kakazei


1 Local flux-flow instability in superconducting films near Tc
A. I. Bezuglyj, V. A. Shklovskij, R. V. Vovk, V. M. Bevz,
M. Huth, and O. V. Dobrovolskiy
Phys. Rev. B 99, 174518 (2019), arXiv:1905.03564
2 Fast dynamics of guided magnetic flux quanta
O. V. Dobrovolskiy, V. M. Bevz, E. Begun, R. Sachser,
R. V. Vovk, and M. Huth
Phys. Rev. Appl. 11, 054064 (2019), arXiv:1902.03761
3 Crystalline niobium carbide superconducting nanowires
prepared by focused ion beam direct writing
F. Porrati, S. Barth, R. Sachser, O. V. Dobrovolskiy,
A. Seybert, A. S. Frangakis, and M. Huth
ACS Nano 13, 6287-6296 (2019)
4 Spin-wave phase inverter upon a single nanodefect
O. V. Dobrovolskiy, R. Sachser, S. A. Bunyaev, V. M. Bevz,
M. Zelent, W. Smigaj, J. Rychly, M. Krawczyk, R. V. Vovk,
M. Huth, and G. N. Kakazei
ACS Appl. Mater. & Interf. 11, 17654-17662 (2019), arXiv:1902.03758
Phase shifter
5 Microwave radiation detection with an ultra-thin free-standing superconducting niobium nanohelix
S. Lösch, A. Alfonsov, O. V. Dobrovolskiy, R. Keil, V. Engemaier,
S. Baunack, G. Li, O. G. Schmidt, and D. Bürger
ACS Nano 13, 2948-2955 (2019)
6 Magnetic properties of Permalloy antidot arrays
fabricated by interference lithography

A. S. Silva, A. Hierro-Rodriguez, S. A. Bunyaev, G. N. Kakazei,
O. V. Dobrovolskiy, C. Redondo, R. Morales, H. Crespo, and D. Navas
AIP Advances 9035136 (2019)
7 Magnon-Fluxon interaction in a ferromagnet / superconductor heterostructure
O. V. Dobrovolskiy, R. Sachser, T. Brächer, T. Fischer, V. V. Kruglyak,
R. V. Vovk, V. A. Shklovskij, M. Huth, B. Hillebrands, and A. V. Chumak
Nature Physics 15, 477-482 (2019), arXiv:1901.06156
8 Reduction of microwave loss by mobile fluxons
in grooved Nb films

O. V. Dobrovolskiy, R. Sachser, V. M. Bevz, A. Lara, F. G. Aliev,
V. A. Shklovskij, A. I. Bezuglyj, R. V. Vovk, and M. Huth
Phys. Stat. Sol. - RRL 13
18002231-5 (2019), arXiv:1805.10882
mw loss
9 Microwave emission from superconducting vortices
in Mo/Si superlattices

O. V. Dobrovolskiy, V. M. Bevz, M. Yu. Mikhailov, O. I. Yuzephovich,
V. A. Shklovskij, R. V. Vovk,  M. I. Tsindlekht, R. Sachser, and M. Huth

Nature Comms. 9, 4927 (2018),
10 Role of magnons and the size effect in heat transport
through an insulating ferromagnet-insulator interface

V. A. Shklovskij, V. V. Kruglyak, R. V. Vovk, and O. V. Dobrovolskiy

Phys. Rev. B 98, 224403 (2018), arXiv:1808.07294
11 Nonlinear relaxation between magnons and phonons
in insulating ferromagnets

V. A. Shklovskij, V. V. Mezinova, and O. V. Dobrovolskiy
Phys. Rev. B 98, 104405–1-7 (2018), arXiv:1806.05501
12 Radiofrequency generation by coherently moving fluxons
O. V. Dobrovolskiy, R. Sachser, M. Huth, V. A. Shklovskij,
R. V. Vovk, V. M. Bevz, and M. I. Tsindlekht
Appl. Phys. Lett. 112, 152601–1-5 (2018), arXiv:1804.00856
13 Pinning effects on self-heating and flux-flow instability
in superconducting films near Tc

V. A. Shklovskij, A. P. Nazipova, and O. V. Dobrovolskiy,
Phys. Rev. B 95, 184517–1-9 (2017), arXiv:1705.00363
14 Mobile fluxons as coherent probes of periodic pinning
in superconductors

O. V. Dobrovolskiy, M. Huth, V. A. Shklovskij, and R. V. Vovk
Scientific Reports 7, 13740
1-10 (2017), arXiv:1710.02554
15 Pinning effects on flux-flow instability in epitaxial Nb thin films
O. V. Dobrovolskiy, V. A. Shklovskij, M. Hanefeld,
M. Zörb, L. Köhs, and M. Huth,
Supercond. Sci. Technol. 30
, 085002 (2017), arXiv:1704.08833

Monographs and reviews

1. Vortices at microwave frequencies (Book chapter)
E. Silva, N. Pompeo, and O. V. Dobrovolskiy
in Superconductors at the Nanoscale: From Basic Research to Applications
(eds.) R. Wördenweber. V. Moshchalkov, S. Bending, F. Tafuri
De Gruyter, Berlin, 2017, chap. 8, pp. 253-278
ISBN 978-3-11-045620-2

2. Pinning and vortex dynamics in superconductors (Tutorial)
V. A. Shklovskij and O. V. Dobrovolskiy
Lambert Academic Publishing, Saarbrücken, 2017, 136 p.
ISBN 978-3-330-04172-1

3. Focused electron beam induced deposition meets materials science (Invited Review)
M. Huth, F. Porrati, O. V. Dobrovolskiy
Microelectron. Engin., 185 
186, 9 (2018), arXiv:1709.05835

4. Vortices at microwave frequencies (Invited Review)
E. Silva, N. Pompeo, and O. V. Dobrovolskiy
Phys. Sci. Rev. 10, 20178004 (2017) 

5. Abrikosov fluxonics in washboard nanolandscapes (Invited Review)
O. V. Dobrovolskiy,
Physica C 533
, 80–90 (2017), arXiv:1510.06872

Last update: 25.06.2019