Prof. Dr. Nikolai A. Sobolev
Department of Physics, University of Aveiro, Aveiro, Portugal
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Academic Career Length
49Years (1978-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 June 2009 in Journal of Magnetism and Magnetic Materials
Journal Article
VKVladimir Khomchenko
Vladimir Khomchenko
Dmitry A. KiselevMKM. Kopcewicz
M. Kopcewicz
MMM. Maglione
M. Maglione
Vladimir Shvartsman
Andrei Kholkin +8
7 August 2018 in ChemSusChem
Journal Article
Eliana Sousa Da Silva
Nuno M. M. MouraCACoutinho Ana
Coutinho Ana
Goran DrazicBTBruno M. S. Teixeira
Bruno M. S. Teixeira
Joaquim Luís Faria +4
21 October 2016 in physica status solidi (c)
Journal Article
DTDavid Tetelbaum
David TetelbaumEGE. G. Gryaznov
E. G. Gryaznov
ABA. I. Belov
A. I. Belov
DKDmitry S. Korolev
Dmitry S. KorolevASA. N. Sharapov
A. N. SharapovBSB. Spagnolo
B. Spagnolo
+12
1 October 2010 in Journal of Applied Physics
Journal Article
VKVladimir Khomchenko
Vladimir Khomchenko
Dmitry KarpinskyAndrei KholkinNikolai A. SobolevGKGleb Kakazei
Gleb KakazeiJPJosé António Paixão
José António Paixão +3
Investigation of crystal structure, ferroelectric, and magnetic properties of polycrystalline samples was carried out. X-ray diffraction study revealed composition-driven rhombohedral-to-orthorhombic phase transition at . Both structural phases were found to coexist in a broad concentration range. Piezoresponse force microscopy found suppression of the parent ferroelectric phase upon dysprosium substitution. Magnetometric study confirmed that the -site doping induces appearance of a weak ferromagnetic behavior. Both the ferroelectric and magnetic properties were shown to correlate with a structural evolution.
1 December 2017 in Applied Surface Science
Journal Article
HTH. Trabelsi
H. Trabelsi
MBM. Bejar
M. Bejar
EDE. Dhahri
E. Dhahri
Manuel Pedro Fernandes Graça
Manuel ValenteNikolai A. Sobolev +1
24 September 2010 in Physical Review B
Journal Article
JZJan Zippel
Jan Zippel
Michael LorenzASAnnette Setzer
Annette Setzer
GWGerald Wagner
Gerald Wagner
Nikolai A. Sobolev
Marius Grundmann +1
A doping-independent ferromagnetic hysteresis at 300 and 5 K was found for both undoped and Mn-doped zirconia thin films with up to 20$\hskip0.3em${}at.\,% Mn. The lack of Mn-induced magnetic ordering is a strong indication that the observed ferromagnetic effects are defect related. Electron paramagnetic resonance analysis supports the conclusion that Mn ions are in a magnetically ``silent'' state. Cubic ZrO2:Mn films show a noticeable layer ferromagnetic saturation magnetization at 5 K, as compared to the monoclinic and tetragonal films, which clearly correlates with strain and a higher density of dislocations as the dominating microstructural defect.
About Me
Prof. Dr. Nikolai A. Sobolev is currently a Retired Professor at the Department of Physics, University of Aveiro, Portugal. He received his PhD in semiconductor physics from Friedrich Schiller University of Jena, Germany. He is a founding member of the Institute of Nanostructures, Nanomodelling and Nanofabrication (i3N), where he continues to conduct research. He has published more than 200 papers in peer-reviewed journals and conference proceedings, as well as 7 patents and 4 book chapters as an author or co-author. He has been an invited professor and invited scientist at universities in Berlin, Jena, Ulm (Germany), Gdansk (Poland) and Moscow (Russia). Nikolai Sobolev has been the co-ordinator of several international and national research projects and has chaired or been a member of committees at more than 50 international conferences.