Awards:

• State Prize of Ukraine in the field of science and technology, 2014
• O.S.Davydov Prize of the Presidium of the National Academy of Sciences of Ukraine, 2006
• Diploma of the K.D.Synelnikov scholarship holder in the field of science of the Kharkiv Regional State Administration, 2015
• Diploma of the Verkhovna Rada of Ukraine for services to the Ukrainian people, 2010
• Honors of the National Academy of Sciences of Ukraine "For professional achievements", 2018
• Honors of the National Academy of Sciences of Ukraine "For preparation of scientific change", 2025
• Medal of V.N.Karazin of the Kharkiv National University, 2025

Languages:

Ukrainian, Russian, English

Education:

Field of Scientific Interest:

Theoretical condensed matter physics, nonlinear mechanics, nonlinear dynamics of elastic media, nonlinear mechanics of magnetically ordered media, theory of dynamical and topological solitons, asymptotic methods of nonlinear physics.

Main Achievements:

• The theory of dynamic crowdions in an elastic medium was constructed (with A.M. Kosevich).
• Asymptotic methods for the analysis of soliton dynamics in condensed matter physics were developed (with A.M. Kosevich).
• New types of nonlinear excitations in magnetics were proposed and theoretically investigated: magnetic skyrmions, disclinations associated with dislocations and steps on the surface, nonlinear surface spin waves and solitons.
• The concept of magnetic solitons as the bound states of a large number of magnons was developed (with A.M. Kosevich and B.O. Ivanov).
• The theory of the dynamics of magnetic vortices and their interaction with each other, with defects and magnons was developed as well.
• The nature of the exchange bias phenomenon and its connection with the classification of possible magneto-field dependences were theoretically investigated.

Professional Experience:

Work at foreign universities (1-3 months per year) as a visitor:

• Sweden, Linköping University, 2003, 2005.
• United Kingdom, University of Birmingham, 2004.
• Poland, Universities of Warsaw and Białystok, 2002
• France, University of Paris-6, 1997, 2002.
• Germany, Universities of Regesburg and Bayreuth, annually, 1993-2002.
• Australia, University of Canberra, 1997-1998

Associate Editor-in-Chief of Fizyka Nyzkykh Temperatur

Educational activity:

Scientific adviser of 7 PhDs and 1 DSc..

Part-time professor at the V.N. Karazin Kharkiv National University, 2001-present

Teaching lectures on nonlinear physics for postgraduate students of ILTPE of NAS of Ukraine, 2002-2005

Teaching a general course in theoretical mechanics and a special course in the theory of nonlinear oscillations, waves and structures for students of Kharkiv National University. 1990-2005

Part-time lecturer at the V.N. Karazin Kharkiv National University, 1990-2001

Publication of the V.N. Karazin Kharkiv National University textbooks on classical mechanics and the theory of nonlinear oscillations, 2012, 2013, 2016, 2018.

Publications:

Number of papers: 215 (in the refereed journals - 200)

Selected Publications for the last 10 years:

1. A.S. Kovalev. Dynamics of magnetic vortices in the field of local inhomogeneity of a ferromagnet" // Fizika Nizkikh Temperatur/Low Temperature Physics, 2024, v.50, N 2, 125-132 / 117–124
2. A.S. Kovalev, E.V. Ezerskaya. Dissipative nonlinear dynamics of ferromagnetic bilayer // Fizika Nizkikh Temperatur/Low Temperature Physics, 2024, v.50, N 10, 968-972 / 968-972
3. A.S. Kovalev, “Nonlinear dynamics of magnetic multilayers and low- dimensional magnets. I. Easy-plane magnetic anisotropy”, LTP, 49, N10, 1122-1136, 2023.
4. A.S. Kovalev, E.V. Ezerskaya, L.R. Krbashyan, “Nonlinear dynamics of magnetic multilayers. II.Antiferromagnetic interlayer interaction”, LTP, 49, N12, 1419-1438, 2023.
5. A.S. Kovalev, A.A. Peretyatko, “Nonlinear dynamics of the magnet with localized high-frequency external impact”, LTP, 48, N12, 1071-1086, 2022.
6. A.S. Kovalev, “Magnetic vortices in media with spatially inhomogeneous exchange interaction”, LTP, 47, N9, 774-483, 2021.
7. A.S. Kovalev, ”Resonance properties of magnetic helical structures”, LTP, 46, N7, 704-711, 2020
8. A.S. Kovalev, Y.E. Prilepskii, “Dynamics of pair of coupled nonlinear systems.I.Magnetic systems”, LTP, 46, N8, 856-862, 2020
9. A.S. Kovalev, Resonant properties of domain walls in low-dimension antiferromagnets, LTP, 44, N1, 69–72, 2018
10. A.S. Kovalev, J.E. Prilepskii, Interaction of magnetic vortices with defects, LTP,. 44, N7, 663–670, 2018
11. A.S. Kovalev, The vortex structure of magnetic solitons, LTP,. 43, N2, 274–283, 2017
12. A.S. Kovalev, V.L. Pankratova, M. Zukovic, Understanding of Exchange Bias in Ferromagnetic/Antiferromagnetic Bilayers, in “Exchange Bias: From Thin Film to Nanogranular and Bulk Systems”, Monograph Series in Physical Sciences, Taylor & Frances Inb. CRC Press, 205-233, 2017.
13. V.I. Belan; A.S. Kovalev; A.A. Peretyatko, Properties of quasi-soliton states in nonlinear media under local high-frequency irradiation. Analytic description and comparison with numerical simulations, LTP, 42, N12, 1130–1138, 2016
14. M.L.Pankratova; A.S. Kovalev, Model of exchange bias in a trilayer FM/AFM/FM structure, LTP, 41, N10, 838–844, 2015