Magnetic phase diagram of magnetocaloric TmFeO Kirill I. Tkachenko, Piotr Fabrykiewicz, Aleksandr K. Ovsianikov, Martin Meven, Oleg V. Usmanov, Igor A. Zobkalo, Kirill A. Shaykhutdinov, Konstantin Yu. Terentjev, Sergey V. Semenov, Eric Ressouche, Ketty Beauvois Physical Review B, 2026
Special Fetures of Magnetism in Dy1 – xHoxMnO3 A. N. Matveeva, I. A. Zobkalo, A. G. Pshenichnaia Bulletin of the Russian Academy of Sciences Physics, 2023 Abstract Crystal and magnetic structures of Dy1 – xHoxMnO3 multiferroic single crystals (x = 0, 0.2) were investigated by the neutron diffraction methods. It is shown that the substitution of Dy by Ho at the level of 20% does not change the crystal symmetry of the compound, which is described by the Pbnm space group for both compounds down to lowest temperatures and magnetic ordering does not change the crystal structure within accuracy of the measurements. Substitution of Dy by Ho suppresses spontaneous ordering of a rare-earth subsystem with a propagation vector (0 0.5 0). This leads to a situation when two magnetic subsystems, manganese and rare-earth ones, have a coherent incommensurate space propagation.
Crystal Field Parameters and Magnetic Properties Correlations in Rare-earth Orthoferrite HoFeO3 O. V. Usmanov, A. K. Ovsianikov, I. A. Zobkalo, K. A. Shaykhutdinov, K. Yu. Terentjev, S. V. Semenov Journal of Surface Investigation, 2022 The crystal structure and magnetic properties investigations of holmium orthoferrite compound HoFeO3 were performed in temperature range 7–300 K. Obtained XRD data confirm that HoFeO3 retains the orthorhombic perovskite structure of Pbnm space group. The crystal electric field (CEF) parameters of Ho3+ ion subsystem has been revealed numerically on the base of point charge model in the same temperature range. By this set of parameters CEF the splitting of Ho3+ energy levels was calculated and their temperature evolution was obtained. Modelling of isothermal magnetization M(H) with obtained set of parameters was carried out. Ho3+ single ion anisotropy due to CEF effects was demonstrated. Bulk magnetization evaluated from CEF was compared to experimental data.
Magnetic phase diagram of HoFeO3 by neutron diffraction A.K. Ovsianikov, O.V. Usmanov, I.A. Zobkalo, V. Hutanu, S.N. Barilo, N.A. Liubachko, K.A. Shaykhutdinov, K. Yu Terentjev, S.V. Semenov, T. Chatterji, M. Meven, P.J. Brown, G. Roth, L. Peters, H. Deng, A. Wu Journal of Magnetism and Magnetic Materials, 2022
Optical and magnetic investigation of multiferroic and magnetocaloric properties of Nd0.8Tb0.2Mn2 O5 S. Mansouri, M. Balli, S. Jandl, A. O. Suleiman, P. Fournier, M. Orlita, I. A. Zobkalo, S. N. Barilo, M. Chaker Physical Review B, 2022 The multiferroic and the rotating magnetocaloric properties of ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ are investigated by microscopic optical probes and macroscopic magnetic measurements. Raman-active phonons as a function of temperature, and ${\mathrm{Nd}}^{3+}$ and ${\mathrm{Tb}}^{3+}$ infrared active crystal-field (CF) excitations as a function of temperature and under magnetic fields up to 11 T have been studied in ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$. The obtained results are compared to those of ${\mathrm{NdMn}}_{2}{\mathrm{O}}_{5}$ and ${\mathrm{TbMn}}_{2}{\mathrm{O}}_{5}$ reference compounds. The observation of one set of Raman-active phonons and CF excitations rule out possible twinning while their energy positions and thermal evolutions indicate noticeable changes of Mn1-O3-Mn1 and ${\mathrm{TbO}}_{8}$ structural units. This would explain the nature of separated magnetic phases in ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$. The degeneracy of the ground-state Kramers doublet is lifted $({\mathrm{\ensuremath{\Delta}}}_{0}\ensuremath{\sim}9\phantom{\rule{0.16em}{0ex}}\mathrm{c}{\mathrm{m}}^{\text{--}1})$, indicating that the ${\mathrm{Nd}}^{3+}\text{--}{\mathrm{Mn}}^{3+}$ interaction impacts the magnetic and ferroelectric properties of ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$. The Zeeman splitting of excited crystal-field levels of the ${\mathrm{Nd}}^{3+}$ ions at low temperatures shows that $\mathrm{the}\phantom{\rule{4pt}{0ex}}{g}_{z}$ factor is weak compared to that in ${\mathrm{NdMn}}_{2}{\mathrm{O}}_{5}$. This indicates that the ${R}^{3+}$ spins in ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ are mostly aligned within the $ab$-plane. The nature of magnetocrystalline anisotropy in ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ as well as in all $R{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ compounds is quantitatively investigated by studying the anisotropy of paramagnetic Curie temperatures along (${\ensuremath{\theta}}_{||}$) and perpendicular (${\ensuremath{\theta}}_{\ensuremath{\perp}}$) to the $c$ axis, $({\ensuremath{\theta}}_{||}\ensuremath{-}{\ensuremath{\theta}}_{\ensuremath{\perp}})$, as a function of the rare-earth atomic number. It is particularly found that the magnetocrystalline anisotropy is mainly determined by the quadrupolar charge distribution of $4f$ shells. The rotating magnetocaloric effect in ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ is also evaluated and compared to that in ${\mathrm{NdMn}}_{2}{\mathrm{O}}_{5}$ and ${\mathrm{TbMn}}_{2}{\mathrm{O}}_{5}$. Our findings show that Nd- and Tb- separated magnetic phases independently contribute to the magnetocaloric effect of ${\mathrm{Nd}}_{0.8}{\mathrm{Tb}}_{0.2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$.
In situ formation of LDH-based nanocontainers on the surface of AZ91 magnesium alloy and detailed investigation of their crystal structure Tatsiana Shulha, M. Serdechnova, M.H. Iuzviuk, I.A. Zobkalo, P. Karlova, N. Scharnagl, D.C.F. Wieland, S.V. Lamaka, A.A. Yaremchenko, C. Blawert, M.L. Zheludkevich Journal of Magnesium and Alloys, 2022 In the presented work, the possibility of direct synthesis of LDH (layered double hydroxide) on the AZ91 surface in the presence of a chelating agent (diethylenetriaminepentaacetic acid - DTPA) is reported. Conversion layer of LDH nanocontainers were formed under ambient pressure conditions without carbonate addition in the electrolyte. The obtained LDH was characterized using experimental (SEM, XRD, TGA, XPS, Raman, etc.) and computational methods (thermodynamic calculation, modeling of possible LDH crystal structures). A comparison of three possible LDHs (LDH-OH, -NO3 and -CO3) was performed. Based on the experimental results and crystal simulation approach, it was confirmed, that the mixed LDH-OH/CO3 is grown on the surface in the presence of DTPA pentasodium salt.
Magnetic Phases and Chirality Control in Magnetic Multiferroics Nd0.8Tb0.2 MnO by the Neutron Scattering Igor Zobkalo, Sergey Gavrilov, Anna Matveeva, Andrew Sazonov, Sergey Barilo, Sergey Shiryaev, Vladimir Hutanu IEEE Transactions on Magnetics, 2022 Neutron diffraction study of Nd<sub>0.8</sub>Tb<sub>0.2</sub>Mn<sub>2</sub>O<sub>5</sub> single crystal has been performed using both non-polarized and polarized neutron diffraction. Low temperature set of magnetic satellites corresponding to two magnetic ordered phases witnesses about the magnetic phase separation. One of those phases with propagation vector <inline-formula> <tex-math notation="LaTeX">$k_{1} = (0.5\\,\\,0\\,\\,k_{z1})$ </tex-math></inline-formula> bears features of magnetic order in TbMn<sub>2</sub>O<sub>5</sub> with ordering temperature <inline-formula> <tex-math notation="LaTeX">$\\text {TN} \\approx 37$ </tex-math></inline-formula> K. Another one with propagation vector <inline-formula> <tex-math notation="LaTeX">$k_{2} = (0.5\\,\\,0\\,\\,k_{z2})$ </tex-math></inline-formula> and Neel temperature of <inline-formula> <tex-math notation="LaTeX">$\\text {TN2} \\approx 30$ </tex-math></inline-formula> K has a great similarity to magnetic order of NdMn<sub>2</sub>O<sub>5</sub>. Both of them are chiral at low temperatures. Difference in chiral domain population could be controlled by the external electric field of few kV/cm. Two additional magnetic phases with <inline-formula> <tex-math notation="LaTeX">$k_{3,4} = (0.5\\,\\,0\\,\\,k_{z3,4})$ </tex-math></inline-formula> were observed in the short intermediate temperature range 20–28 K. Significant temperature hysteresis of 6–8 K for all magnetic phases was observed in dependence of cooling/heating temperature evolution. Results are discussed in the frame of competing magnetic interactions.
In situ kinetics studies of Zn-Al LDH intercalation with corrosion related species Mariia H. Iuzviuk, Anissa C. Bouali, Maria Serdechnova, Kiryl A. Yasakau, D. C. Florian Wieland, Gleb Dovzhenko, Aliaksandr Mikhailau, Carsten Blawert, Igor A. Zobkalo, Mario G. S. Ferreira, Mikhail L. Zheludkevich Physical Chemistry Chemical Physics, 2020
Polarized neutron studies of CeNiSn A Hiess, I Zobkalo, M Bonnet, J Schweizer, E Lelièvre-Berna, F Tasset, Y Isikawa, G H Lander Journal of Physics Condensed Matter, 1997
On the magnetisation density of CeNiSn A. Hiess, I. Zobkalo, M. Bonnet, J. Schweizer, E. Lelièvre-Berna, F. Tasset, Y. Isikawa, G.H. Lander Physica B Condensed Matter, 1997
Neutron studies of the magnetic properties of EuMn2O5 Physics of the Solid State, 1996
Magnetic phase transitions in Gd2CuO4 T. Chattopadhyay, P. J. Brown, A. A. Stepanov, P. Wyder, J. Voiron, A. I. Zvyagin, S. N. Barilo, D. I. Zhigunov, I. Zobkalo Physical Review B, 1991
Magnetic phase diagram of magnetocaloric KI Tkachenko, P Fabrykiewicz, AK Ovsianikov, M Meven, OV Usmanov, ... Physical Review B 113 (5), 054404 , 2026 2026 Citations: 2
OBMENNYE VZAIMODEYSTVIYa V PODREShETKE Fe V REDKOZEMEL'NYKh ORTOFERRITAKh RFeO3 AK Ovsyanikov, OV Usmanov, IA Zobkalo, MK Yuzvyuk Žurnal èksperimentalʹnoj i teoretičeskoj fiziki 167 (3), 379-384 , 2025 2025
Mechanisms for Multiferroicity in Rare Earth Orthoferrites: An Overview P Fabrykiewicz, V Hutanu, K Shaykhutdinov, M Stekiel, I Zobkalo, ... International Conference on Neutron Scattering 2025 , 2025 2025
Mechanisms for Multiferroicity in Rare Earth Orthoferrites: An Overview A Ovsianikov, U Christensen, W Schmidt, E Ressouche, IA Zobkalo, ... 32nd Annual Meeting of the German Crystallographic Society , 2024 2024
Magnetic ordering and chirality in multiferroic Dy1-xHoxMnO3 (x= 0.2) AN Matveeva, IA Zobkalo, A Sazonov, AL Freidman, SV Semenov, ... Physica B: Condensed Matter 658, 414821 , 2023 2023 Citations: 1
Special features of magnetism in Dy 1–x Ho x MnO 3 AN Matveeva, IA Zobkalo, AG Pshenichnaia Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ 87 (4), 567-572 , 2023 2023
Special Fetures of Magnetism in Dy 1 – x Ho x MnO 3 AN Matveeva, IA Zobkalo, AG Pshenichnaia Bulletin of the Russian Academy of Sciences: Physics 87 (4), 492-497 , 2023 2023 Citations: 1
Complex interplay between 3d and 4f magnetic systems in multiferroic DyMnO3 AN Matveeva, IA Zobkalo, M Meven, AL Freidman, SV Semenov, ... Journal of magnetism and magnetic materials 569, 170415 , 2023 2023 Citations: 4
CRYSTAL FIELD PARAMETERS AND MAGNETIC PROPERTIES CORRELATIONS IN RARE-EARTH ORTHOFERRITES OV Usmanov, IA Zobkalo, AK Ovsianikov 2023
Crystal Field Parameters and Magnetic Properties Correlations in Rare-earth Orthoferrite HoFeO 3 OV Usmanov, AK Ovsianikov, IA Zobkalo, KA Shaykhutdinov, ... Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques … , 2022 2022 Citations: 5
Inelastic neutron studies and diffraction in magnetic fields of TbFeO3 and YbFeO3 AK Ovsianikov, OV Usmanov, IA Zobkalo, W Schmidt, A Maity, V Hutanu, ... Journal of magnetism and magnetic materials 563, 170025 , 2022 2022 Citations: 9
Magnetic phase diagram of HoFeO3 by neutron diffraction AK Ovsianikov, OV Usmanov, IA Zobkalo, V Hutanu, SN Barilo, ... Journal of magnetism and magnetic materials 557, 169431 , 2022 2022 Citations: 19
Optical and magnetic investigation of multiferroic and magnetocaloric properties of S Mansouri, M Balli, S Jandl, AO Suleiman, P Fournier, M Orlita, ... Physical Review B 106 (8), 085107 , 2022 2022 Citations: 5
Complex interplay between 3d and 4f magnetic systems and magnetic chirality in multiferroic Dy Ho MnO ( ) AN Matveeva, IA Zobkalo, A Sazonov, M Meven, AL Freidman, ... arXiv preprint arXiv:2205.15842 , 2022 2022
In situ formation of LDH-based nanocontainers on the surface of AZ91 magnesium alloy and detailed investigation of their crystal structure T Shulha, M Serdechnova, MH Iuzviuk, IA Zobkalo, P Karlova, ... Journal of Magnesium and Alloys 10 (5), 1268-1285 , 2022 2022 Citations: 42
Magnetic Phases and Chirality Control in Magnetic Multiferroics Nd 0.8 Tb 0.2 Mn₂O₅ by the Neutron Scattering I Zobkalo, S Gavrilov, A Matveeva, A Sazonov, S Barilo, S Shiryaev, ... IEEE transactions on magnetics 58 (2), 1-5 , 2021 2021 Citations: 4
Mechanism of LDH direct growth on aluminum alloy surface: a kinetic and morphological approach AC Bouali, MH Iuzviuk, M Serdechnova, KA Yasakau, D Drozdenko, ... The Journal of Physical Chemistry C 125 (21), 11687-11701 , 2021 2021 Citations: 33
Polarized neutron diffraction in the single-crystal studies IA Zobkalo Crystallography Reports 66 (2), 216-230 , 2021 2021 Citations: 4
In situ synchrotron study of anion exchange kinetics in Zn-Al layered double hydroxides grown on metal surfaces MK Yuzvyuk, IA Zobkalo, AC Bouali, G Dovzhenko, M Serdechnova, ... International conference on neutron scattering in condensed matter research … , 2021 2021
Correlation of magnetic phases and crystal structure in rare-earth orthoferrites OV Usmanov, IA Zobkalo, AK Ovsyannikov, V Hutanu International conference on neutron scattering in condensed matter research … , 2021 2021
MOST CITED SCHOLAR PUBLICATIONS
Zn-Al LDH growth on AA2024 and zinc and their intercalation with chloride: Comparison of crystal structure and kinetics AC Bouali, MH Iuzviuk, M Serdechnova, KA Yasakau, DCF Wieland, ... Applied Surface Science 501, 144027 , 2020 2020 Citations: 76
Coupled magnetic and structural transitions in EuMn2O5 as studied by neutron diffraction and three-dimensional polarization analysis V Polyakov, V Plakhty, M Bonnet, P Burlet, LP Regnault, S Gavrilov, ... Physica B: Condensed Matter 297 (1-4), 208-212 , 2001 2001 Citations: 65
Magnetic phase transitions in T Chattopadhyay, PJ Brown, AA Stepanov, P Wyder, J Voiron, AI Zvyagin, ... Physical Review B 44 (17), 9486 , 1991 1991 Citations: 53
Interaction between the spin chirality and the elastic torsion VI Fedorov, AG Gukasov, V Kozlov, SV Maleyev, VP Plakhty, IA Zobkalo Physics Letters A 224 (6), 372-378 , 1997 1997 Citations: 43
In situ formation of LDH-based nanocontainers on the surface of AZ91 magnesium alloy and detailed investigation of their crystal structure T Shulha, M Serdechnova, MH Iuzviuk, IA Zobkalo, P Karlova, ... Journal of Magnesium and Alloys 10 (5), 1268-1285 , 2022 2022 Citations: 42
Mechanism of LDH direct growth on aluminum alloy surface: a kinetic and morphological approach AC Bouali, MH Iuzviuk, M Serdechnova, KA Yasakau, D Drozdenko, ... The Journal of Physical Chemistry C 125 (21), 11687-11701 , 2021 2021 Citations: 33
In situ kinetics studies of Zn–Al LDH intercalation with corrosion related species MH Iuzviuk, AC Bouali, M Serdechnova, KA Yasakau, DCF Wieland, ... Physical Chemistry Chemical Physics 22 (31), 17574-17586 , 2020 2020 Citations: 33
Neutron inelastic scattering study of rare-earth orthoferrite HoFeO3 AK Ovsyanikov, IA Zobkalo, W Schmidt, SN Barilo, SA Guretskii, V Hutanu Journal of magnetism and magnetic materials 507, 166855 , 2020 2020 Citations: 21
Magnetic phase diagram of HoFeO3 by neutron diffraction AK Ovsianikov, OV Usmanov, IA Zobkalo, V Hutanu, SN Barilo, ... Journal of magnetism and magnetic materials 557, 169431 , 2022 2022 Citations: 19
The influence of PSA pre-anodization of AA2024 on PEO coating formation: Composition, microstructure, corrosion, and wear behaviors M Serdechnova, SA Karpushenkov, LS Karpushenkava, M Starykevich, ... Materials 11 (12), 2428 , 2018 2018 Citations: 18
Polarized neutron scattering investigation of successive magnetic phase transitions in Nd2CuO4 and Nd1. 87Ce0. 19CuO4 IA Zobkalo, AG Gukasov, SY Kokovin, SN Barilo, DI Zhigunov Solid state communications 80 (11), 921-924 , 1991 1991 Citations: 18
Investigation of magnetic structure in R2CuO4 (R= La, Sr, Nd, Ce, Eu) by polarized neutrons AG Gukasov, SY Kokovin, VP Plakhty, IA Zobkalo, SN Barilo, DI Zhigunov Physica B: Condensed Matter 180, 455-458 , 1992 1992 Citations: 15
Magnetic ordering in NdMn2O5 studied by the neutron diffraction IA Zobkalo, SV Gavrilov, NZS Nyi, SN Barilo, SV Shiryaev Journal of magnetism and magnetic materials 354, 85-89 , 2014 2014 Citations: 14
Investigation of TbMn 2 O 5 by polarized neutron diffraction IA Zobkalo, SV Gavrilov, A Sazonov, V Hutanu Journal of Physics: Condensed Matter 30 (20), 205804 , 2018 2018 Citations: 12
A neutron scattering investigation of the magnetic structure and spin correlations in Sm2CuO4 AG Gukasov, VA Polyakov, IA Zobkalo, D Petitgrand, P Bourges, ... Solid state communications 95 (8), 533-536 , 1995 1995 Citations: 12
Direct control of magnetic chirality in by external electric field IA Zobkalo, AN Matveeva, A Sazonov, SN Barilo, SV Shiryaev, ... Physical Review B 101 (6), 064425 , 2020 2020 Citations: 11
Magnetic structure and phase transitions in the “green phase” 160Gd2BaCuO5: Neutron diffraction study AK Ovsyanikov, IV Golosovsky, IA Zobkalo, I Mirebeau Journal of magnetism and magnetic materials 353, 71-75 , 2014 2014 Citations: 11
Polarized neutron studies of CeNiSn A Hiess, I Zobkalo, M Bonnet, J Schweizer, E Lelievre-Berna, F Tasset, ... Journal of Physics: Condensed Matter 9 (43), 9321-9332 , 1997 1997 Citations: 10
Neutron studies of the magnetic properties of EuMn 2 O 5 IA Zobkalo, VA Polyakov, OP Smirnov, SV Gavrilov, VP Plakhtii, ... Physics of the Solid State 38 (4), 725-726 , 1996 1996 Citations: 10
Inelastic neutron studies and diffraction in magnetic fields of TbFeO3 and YbFeO3 AK Ovsianikov, OV Usmanov, IA Zobkalo, W Schmidt, A Maity, V Hutanu, ... Journal of magnetism and magnetic materials 563, 170025 , 2022 2022 Citations: 9