Scientific degrees
Habilitation – 2012
PhD in Physics – 1988
MSc in Physics – 1983
Curriculum vitae: >>>
Research interests
Keywords: theoretical physics, magnetic nanostructures, phase transitions, nonlinear excitations.
The current scientific interest are:
- analytical description of vortex dynamics in circular ferromagnetic nanodots; in collaboration with Universidad del País Vasco, San Sebastian, Spain, IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de Física, Universidade do Porto, Portugal,
- spin wave localization and Bloch oscillations in magnonic crystals due to a gradient of magnetic field; in collaboration with University of Exeter, United Kingdom,
- theoretical explanation of broadband ferromagnetic resonance spectroscopy data in arrays of planar rings; in collaboration with experimental groups from Department of Electrical and Computer Engineering, National University of Singapore and IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de Física, Universidade do Porto, Portugal.
Research stays
June 2018 – July 2018 : Visiting Scientist University of Exeter, United Kingdom
November 2016 – December 2016 : Visiting Scientist Universidad del País Vasco, San Sebastian, Spain
November 2013 – August 2014 : Fulbright fellowship in George Washington University, USA, and NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, USA.
November 2010 – March 2011 : Visiting Scientist Helmholtz-Zentrum, Geesthacht, Germany
January 2009 – April 2009, November 2009 – March 2010 : Visiting Scientist GKSS Research Center, Geesthacht, Germany
December 2007 – February 2008 : Visiting Scientist GKSS Research Center, Geesthacht, Germany
January 2007 – March 2007 : Visiting Scientist GKSS Research Center, Geesthacht, Germany
April 2006 – May 2006 : Visiting Scientist GKSS Research Center, Geesthacht, Germany
Scientific achievements
Theoretical description of magnetic structures and PASANS data in ordered arrays of multilayered galfenol nanowires; in collaboration with NIST Center for Neutron Research and University of Minnesota, USA. The results were published in ACS Nano.
Theoretical description of experiments on local ferromagnetic resonance imaging with magnetic resonance force microscopy (FMRFM), has been developed in collaboration with National Institute of Standards and Technology (NIST), Gaithersburg, USA and with George Washington University, USA. The results were published in Physical Review B.
Theoretical explanation of splitting of spin-wave modes in the case of symmetry violation in ferromagnetic wires and circular dots. Theory is in good agreement with experimental data. The results were published in Scientific Reports and in Physical Review B.
A phenomenological theory describing reorientation phase transitions and magnon dynamics in two-dimensional and three-dimensional magnonic crystals (ordered arrays of interacting cylindrical nanowires and nanospheres) has been developed. The theory explains experimental results obtained in George Washington University (USA) and Instituto de Ciencia de Materiales de Madrid (Spain). The main results of this research were published in Physical Review B, Journal of Applied Physics and Journal of Magnetism and Magnetic Materials.
A microscopic theory describing magnetic dynamics in one-dimensional magnonic crystals (multilayers) has been developed. Using the results of this theory, a set of the experiments on neutron facilities in ILL (France) and Helmholtz-Zentrum, Geesthacht (Germany) was planned and realized. The results of the experiments approved quantitatively the theoretical predictions. The main results of this research have been published in Applied Physics Letters and in Physical Review B.
Theoretical description of magnetic properties of FePtRh films and the experimentally observed reorientation phase transitions in such thin films with itinerant magnetism is presented. The results, obtained in collaboration with Helmholtz-Zentrum and Juelich Research Center, Institute for Research on Solid State Physics (Germany), MINT Center, University of Alabama (USA) and Australian Nuclear Science and Technology Organisation (Australia), were published in Physical Review B and Journal of Applied Crystallography.
Theoretical explanations of polarized neutron data on field-induced chirality in rare-earth multilayers; in collaboration with Helmholtz-Zentrum, Geesthacht, Germany. The main results of this research were published in Physical Review B, and Journal of Magnetism and Magnetic Materials.
Publications
2024
|
| 4. | Krzysztof Szulc, Yulia Kharlan, Pavlo Bondarenko, Elena V. Tartakovskaya, Maciej Krawczyk Impact of surface anisotropy on the spin-wave dynamics in a thin ferromagnetic film Phys. Rev. B, 109 , pp. 054430, 2024. Links | BibTeX @article{PhysRevB.109.054430,
title = {Impact of surface anisotropy on the spin-wave dynamics in a thin ferromagnetic film},
author = {Krzysztof Szulc and Yulia Kharlan and Pavlo Bondarenko and Elena V. Tartakovskaya and Maciej Krawczyk},
url = {https://link.aps.org/doi/10.1103/PhysRevB.109.054430},
doi = {10.1103/PhysRevB.109.054430},
year = {2024},
date = {2024-02-01},
journal = {Phys. Rev. B},
volume = {109},
pages = {054430},
publisher = {American Physical Society},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
2023
|
| 3. | Dariia Popadiuk, Elena V. Tartakovskaya, Maciej Krawczyk, Kostyantyn Guslienko Emergent Magnetic Field and Nonzero Gyrovector of the Toroidal Magnetic Hopfion physica status solidi (RRL) – Rapid Research Letters, n/a (n/a), pp. 2300131, 2023. Abstract | Links | BibTeX @article{https://doi.org/10.1002/pssr.202300131,
title = {Emergent Magnetic Field and Nonzero Gyrovector of the Toroidal Magnetic Hopfion},
author = {Dariia Popadiuk and Elena V. Tartakovskaya and Maciej Krawczyk and Kostyantyn Guslienko},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/pssr.202300131},
doi = {https://doi.org/10.1002/pssr.202300131},
year = {2023},
date = {2023-05-13},
journal = {physica status solidi (RRL) – Rapid Research Letters},
volume = {n/a},
number = {n/a},
pages = {2300131},
abstract = {Magnetic hopfions are localized magnetic solitons with a nonzero 3D topological charge (Hopf index). Herein, an analytical calculation of the magnetic hopfion gyrovector is presented and it is shown that it does not vanish even in an infinite sample. The calculation method is based on the concept of the emergent magnetic field. The particular case of the simplest nontrivial toroidal hopfion with the Hopf index | QH |=1$łeft|right. Q_textĦ łeft|right. = 1$ in the cylindrical magnetic dot is considered and dependencies of the gyrovector components on the dot sizes are calculated. Nonzero hopfion gyrovector is important in any description of the hopfion dynamics within the collective coordinate Thiele's approach.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Magnetic hopfions are localized magnetic solitons with a nonzero 3D topological charge (Hopf index). Herein, an analytical calculation of the magnetic hopfion gyrovector is presented and it is shown that it does not vanish even in an infinite sample. The calculation method is based on the concept of the emergent magnetic field. The particular case of the simplest nontrivial toroidal hopfion with the Hopf index | QH |=1$łeft|right. Q_textĦ łeft|right. = 1$ in the cylindrical magnetic dot is considered and dependencies of the gyrovector components on the dot sizes are calculated. Nonzero hopfion gyrovector is important in any description of the hopfion dynamics within the collective coordinate Thiele's approach. |
2022
|
| 2. | Krzysztof Sobucki, Maciej Krawczyk, Elena V. Tartakovskaya, Piotr Graczyk Magnon spectrum of Bloch hopfion beyond ferromagnetic resonance APL Materials, 10 (9), pp. 091103, 2022. Abstract | Links | BibTeX @article{doi:10.1063/5.0100484,
title = {Magnon spectrum of Bloch hopfion beyond ferromagnetic resonance},
author = {Krzysztof Sobucki and Maciej Krawczyk and Elena V. Tartakovskaya and Piotr Graczyk},
url = {https://doi.org/10.1063/5.0100484},
doi = {10.1063/5.0100484},
year = {2022},
date = {2022-09-08},
journal = {APL Materials},
volume = {10},
number = {9},
pages = {091103},
abstract = {With the development of new nanofabrication technologies and measurement techniques, the interest of researchers is moving toward 3D structures and 3D magnetization textures. Special attention is paid to the topological magnetization textures, particularly hopfions. In this paper, we investigate the magnetization dynamics of the hopfion through the numerical solution of the eigenvalue problem. We show that the spectrum of spin-wave modes of the hopfion is much richer than those attainable in ferromagnetic resonance experiments or time-domain simulations reported so far. We identified four groups of modes that differ in the character of oscillations (clockwise or counter-clockwise rotation sense), the position of an average amplitude localization along the radial direction, and different oscillations in the vertical cross section. The knowledge of the full spin-wave spectrum shall help in hopfion identification, understanding of the interaction between spin waves and hopfion dynamics as well as the development of the potential of hopfion in spintronic and magnonic applications.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
With the development of new nanofabrication technologies and measurement techniques, the interest of researchers is moving toward 3D structures and 3D magnetization textures. Special attention is paid to the topological magnetization textures, particularly hopfions. In this paper, we investigate the magnetization dynamics of the hopfion through the numerical solution of the eigenvalue problem. We show that the spectrum of spin-wave modes of the hopfion is much richer than those attainable in ferromagnetic resonance experiments or time-domain simulations reported so far. We identified four groups of modes that differ in the character of oscillations (clockwise or counter-clockwise rotation sense), the position of an average amplitude localization along the radial direction, and different oscillations in the vertical cross section. The knowledge of the full spin-wave spectrum shall help in hopfion identification, understanding of the interaction between spin waves and hopfion dynamics as well as the development of the potential of hopfion in spintronic and magnonic applications. |
2021
|
| 1. | X. Zhou, Elena V. Tartakovskaya, G. N. Kakazei, A. O. Adeyeye Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields Phys. Rev. B, 104 , pp. 214402, 2021. Abstract | Links | BibTeX @article{PhysRevB.104.214402,
title = {Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields},
author = {X. Zhou and Elena V. Tartakovskaya and G. N. Kakazei and A. O. Adeyeye},
url = {https://link.aps.org/doi/10.1103/PhysRevB.104.214402},
doi = {10.1103/PhysRevB.104.214402},
year = {2021},
date = {2021-12-03},
journal = {Phys. Rev. B},
volume = {104},
pages = {214402},
publisher = {American Physical Society},
abstract = {Control of the spin wave dynamics in nanomagnetic elements is very important for the realization of a broad range of novel magnonic devices. Here we study experimentally the spin wave resonance in thick ferromagnetic rings (100 nm) using perpendicular ferromagnetic resonance spectroscopy. Different from what was observed for the continuous film of the same thickness, or from rings with similar lateral dimensions but with lower thicknesses, the spectra of thick patterned rings show a nonmonotonic dependence of the mode intensity on the resonance field for a fixed frequency. To explain this effect, the theoretical approach by considering the dependence of the mode profiles on both the radial and axial coordinates was developed. It was demonstrated that such unusual behavior is a result of the competition between exchange and dipolar fields acting at the spin excitations in the structure under study. The calculations are in a good agreement with the experimental results.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Control of the spin wave dynamics in nanomagnetic elements is very important for the realization of a broad range of novel magnonic devices. Here we study experimentally the spin wave resonance in thick ferromagnetic rings (100 nm) using perpendicular ferromagnetic resonance spectroscopy. Different from what was observed for the continuous film of the same thickness, or from rings with similar lateral dimensions but with lower thicknesses, the spectra of thick patterned rings show a nonmonotonic dependence of the mode intensity on the resonance field for a fixed frequency. To explain this effect, the theoretical approach by considering the dependence of the mode profiles on both the radial and axial coordinates was developed. It was demonstrated that such unusual behavior is a result of the competition between exchange and dipolar fields acting at the spin excitations in the structure under study. The calculations are in a good agreement with the experimental results. |
