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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gorev M. V., Bogdanov E. V., Flerov I. N.
Заглавие : Fluorides and oxyfluorides: successive ferroelastic phase transitions and barocaloric effect
Коллективы : Fall Meeting, European Materials Research Society, European Materials Research Society, Warsaw University of Technology
Место публикации : E-MRS fall meeting: conference programme. - 2019. - С. E.P.2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Izotov A. V., Solovev P. N., Boev N. M.
Заглавие : Strain-gradient-induced unidirectional magnetic anisotropy in nanocrystalline thin permalloy films
Место публикации : Phys. Status Solidi RRL. - 2020. - Vol. 14, Is. 1. - Ст.1900467. - ISSN 1862-6254 (ISSN), DOI 10.1002/pssr.201900467. - ISSN 1862-6270 (eISSN)
Примечания : Cited References: 35. - This work was supported by the Ministry of Education and Science of the Russian Federation, project no. RFMEFI60417X0179.
Аннотация: Herein, the effect of inhomogeneous elastic deformation on the magnetic anisotropy of Ni71.5Fe28.5 wt% nanocrystalline films is investigated. The in‐plane controlled strains are induced in the film by bending of a glass substrate which has a thickness step in the middle. Ferromagnetic resonance measurements reveal the existence of in‐plane unidirectional magnetic anisotropy. The anisotropy behavior directly correlates with the calculated strain gradients. It is shown that this correlation is well explained by the flexomagnetic effect, which establishes the relation between the magnetization and the inhomogeneous strains. The experimental value of the flexomagnetic coefficient for the thin Ni71.5Fe28.5 wt% film is 1.5 × 10−3 T m.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mikhaleva E. A., Gorev M. V., Molokeev M. S., Kartashev A. V., Flerov I. N.
Заглавие : Anisotropy of piezocaloric effect at ferroelectric phase transitions in ammonium hydrogen sulphate
Коллективы : Fall Meeting, European Materials Research Society, European Materials Research Society, Warsaw University of Technology
Место публикации : E-MRS fall meeting: conference programme. - 2019. - Ст.E.P.4
Примечания : This work was supported by the Russian Science Foundation (RSF) grant (No. 19-72-00023)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Masyugin A. N., Kretinin V. V., Yanushkevich K. I.
Заглавие : References regulating the BiMnxFe1-xO3 film conductivity upon cooling in magnetic and electric fields
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-52-00009 bel_a, 18-32-00079 mol_a, 3.5743.2017/6.7]
Место публикации : Mater. Res. Express. - 2019. - Vol. 6, Is. 11. - Ст.116125. - ISSN 2053-1591, DOI 10.1088/2053-1591/ab4ec7
Примечания : Cited References: 19. - This study was supported by the Russian Foundation for Basic Research project no. 18-52-00009 bel_a, No. 18-32-00079 mol_a. This work is part of the research program the state order No. 3.5743.2017/6.7.
Предметные рубрики: DOMAINS
Аннотация: The magnetic and electrical properties of the BiFe1-xMnxO3 (x = 0.05, 0.15) films in the temperature range of 80–600 K have been investigated. The Curie temperature (Tc) of the films has been determined. A decrease in the conductivity of the films with x = 0.05 upon cooling in an electric field from the temperatures T ˂ Tc has been found. This effect has been described in the model of decreasing quantum well (domain wall) density and the tunneling coefficient drop. A decrease in the conductivity of the BiFe1-xMnxO3 film by more than an order of magnitude upon cooling from high temperatures in a magnetic field has been established. The experimental data are interpreted using the magnetic-field-induced magnetic structure variation and exchange splitting of the impurity subband.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Melchakova I., Kovaleva E. A., Mikhaleva, Natalia S., Tomilin F. N., Ovchinnikov S. G., Kuzubov A. A., Avramov P. V.
Заглавие : External electric field effect on electronic properties and charge transfer in CoI2/NiI2 spinterface
Коллективы : Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [16.1455.2017/PCh]; National Research Foundation of KoreaNational Research Foundation of Korea [NRF-2017R1A2B4004440]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-43-243011]
Место публикации : Int. J. Quantum Chem. - 2020. - Vol. 120, Is. 3. - Ст.e26092. - ISSN 0020-7608, DOI 10.1002/qua.26092. - ISSN 1097-461X(eISSN)
Примечания : Cited References: 27. - Ministry of Education and Science of the Russian Federation, Grant/Award Number: 16.1455.2017/PCh; National Research Foundation of Korea, Grant/Award Number: NRF-2017R1A2B4004440; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, Grant/Award Number: 18-43-243011
Предметные рубрики: MAGNETIC-PROPERTIES
METAL
EDGE
Аннотация: Electronic structure and spin-related properties of CoI2/NiI2 heterostructure were studied by means of density functional theory. It was shown that the electronic structure at the Fermi level can be characterized by a band gap. The effect of the external electric field on charge transfer and electronic properties of the CoI2/NiI2 interface was investigated, and it was found that band gap width depends on the strength of the applied electric field, switching its nature from semiconducting to a half-metallic one. An easy control of the electronic properties and promising spin-polarized nature of the CoI2/NiI2 spinterface allows the heterostructure to be used in spin-related applications.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие : Evolution of the resonances of two parallel dielectric cylinders with distance between them
Коллективы : Ministry of Education and Science of Russian FederationMinistry of Education and Science, Russian Federation [3.1845.2017]; Russian Foundation for Basic research RFBRRussian Foundation for Basic Research (RFBR) [19-02-00055]
Место публикации : Phys. Rev. A. - 2019. - Vol. 100, Is. 4. - Ст.043806. - ISSN 2469-9926, DOI 10.1103/PhysRevA.100.043806. - ISSN 2469-9934(eISSN)
Примечания : Cited References: 37. - We acknowledge discussions with D. N. Maksimov. This work was partially supported by Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017) and The Russian Foundation for Basic research RFBR Grant No. 19-02-00055.
Предметные рубрики: WHISPERING-GALLERY MODES
MULTIPLE-SCATTERING
FACTOR ENHANCEMENT
Аннотация: We study evolution of resonant modes by traversing over the distance between two parallel dielectric cylinders. The processes of mutual scattering of Mie resonant modes by cylinders result in an interaction between the cylinders which lifts a degeneracy of resonances of the isolated cylinders. There are two basic scenarios of evolution. For strong interaction of cylinders resonances bypass the Mie resonances with increase of the distance. That scenario is typical for low-lying resonances (monopole and dipole). For weak interaction of cylinders the resonances are bound around the Mie resonances of isolated cylinders that form the second scenario. Both scenarios demonstrate a significant enhancement of the Q factor compared to the case of an isolated cylinder.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Mitskan V. A., Zlotnikov A. O., Shustin M. S., Aksenov S. V.
Заглавие : Occurrence of Topologically Nontrivial Phases, Cascade of Quantum Transitions, and Identification of Majorana Modes in Chiral Superconductors and Nanowires (Scientific Summary)
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [16-02-00073, 18-32-00443, 19-02-00348]; Government of the Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-42-243017, 18-42-243018, 18-42-240014]; Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK-3722.2018.2, MK-3594.2018.2]
Место публикации : JETP Letters. - 2019. - Vol. 110, Is. 2. - P.140-153. - ISSN 0021-3640, DOI 10.1134/S002136401914011X. - ISSN 1090-6487(eISSN)
Примечания : Cited References: 88. - This work was supported by the Russian Foundation for Basic Research (project nos. 16-02-00073, 18-32-00443, 19-02-00348) and jointly by the Government of the Krasnoyarsk Territory, the Krasnoyarsk Regional Fund of Science (project no. 18-42-243017, "Manifestation of Coulomb Interactions and Effects of Bounded Geometry in the Properties of Topological Edge States of Nanostructures with Spin-Orbit Interaction"; project no. 18-42-243018, "Contact Phenomena and Magnetic Disorder in the Problem of the Formation and Detection of Topologically Protected Edge States in Semiconductor Nanostructures"; and project no. 18-42-240014, "Single-Orbit Effective Model of an Ensemble of Spin-Polaron Quasiparticles in the Problem of Describing the Intermediate State and Pseudogap Behavior of Cuprate Superconductors"). S.V. Aksenov and A. O. Zlotnikov acknowledge the support of the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project nos. MK-3722.2018.2 and MK-3594.2018.2).
Предметные рубрики: HUBBARD FERMIONS
BOUND-STATE
SPIN
POLARIZATION
COEXISTENCE
Аннотация: The problems of occurrence and experimental identification of topologically nontrivial phases in condensed matter have been reviewed. The results of the study of the effect of strong intra- and interatomic Coulomb interaction on a quantum phase transition with change in the topological index in an ensemble of Hubbard fermions on a triangular lattice have been reported. Nontrivial topology of the phase of coexistence of d + id chiral superconductivity and 120° spin ordering in a system with the triangular lattice has been discussed and the formation of Majorana modes in such a phase has been demonstrated. A cascade of quantum transitions that occurs at the variation of the magnetic field or the electrochemical potential has been analyzed for an open nanowire with the Rashba spin-orbit coupling and the induced superconducting pairing potential. It has been shown that anomalies of magneto- and electrocaloric effects are manifested near such quantum transitions and can be used to experimentally test materials on the existence of topologically nontrivial phases in them. The switching of the spin-polarized current in the topological superconducting phase has been predicted for a semimetal/superconducting wire/semimetal structure in the weak nonequilibrium regime.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Averyanov D. V., Tokmachev, Andrey M., Parfenov, Oleg E., Karateev, Igor A., Sokolov I. S., Taldenkov, Alexander N., Platunov M. S., Wilhelm, Fabrice, Rogalev, Andrei, Storchak V. G.
Заглавие : Probing proximity effects in the ferromagnetic semiconductor EuO
Коллективы : NRC "Kurchatov Institute"; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-07-00249]; Russian Science FoundationRussian Science Foundation (RSF) [19-19-00009]
Место публикации : Appl. Surf. Sci. - 2019. - Vol. 488. - P.107-114. - ISSN 0169-4332, DOI 10.1016/j.apsusc.2019.05.191. - ISSN 1873-5584(eISSN)
Примечания : Cited References: 57. - This work is partially supported by NRC "Kurchatov Institute" (synthesis), the Russian Foundation for Basic Research [grant 19-07-00249] (magnetization measurements), and the Russian Science Foundation [grant 19-19-00009] (transport measurements). The measurements have been carried out using the equipment of the resource centers of electrophysical, laboratory X-ray, and electron microscopy techniques of NRC "Kurchatov Institute". The authors also gratefully acknowledge the beamtime allocation (MA-3167) by the ESRF.
Предметные рубрики: INTERFACE
FIELD
POLARIZATION
INSULATOR
SILICON
Аннотация: Ferromagnetic insulators are widely employed to induce magnetic phenomena in adjacent layers via proximity effect. This approach could make non-magnetic materials (ranging from silicon to graphene) available for spintronic applications. Eu chalcogenides, EuO in particular, are highly efficient spin generators but suffer from low Curie temperatures. Here, experiments aimed at T-C increase in EuO by its integration with the ferromagnetic metal Gd are reported. The epitaxial bilayers Gd/EuO are synthesized on different substrates and characterized by a combination of diffraction and microscopy techniques. Their magnetic structure - established with magnetization and transport measurements as well as element-selective X-ray magnetic circular dichroism study - comprises coupled magnetic orders of EuO and Gd. EuO is robust against proximity effects - its T-C is still low, increased at most by a few tens of K. Nevertheless, the results encourage further studies of proximity-enhanced ferromagnetism to extend the range of applications of ultrathin layers of EuO in spintronics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovsky A. R., Shepelyansky, Dima L.
Заглавие : Evaporative Cooling and Self-Thermalization in an Open System of Interacting Fermions
Коллективы : Programme Investissements d'AvenirFrench National Research Agency (ANR) [ANR-11-IDEX-0002-02, ANR-10-LABX-0037-NEXT]; Russian Science FoundationRussian Science Foundation (RSF) [N19-12-00167]
Место публикации : Ann. Phys.-Berlin. - 2019. - Vol. 531, Is. 12. - Ст.1900231. - ISSN 0003-3804, DOI 10.1002/andp.201900231. - ISSN 1521-3889(eISSN)
Примечания : Cited References: 24. - For D.L.S. this work was supported in part by the Programme Investissements d'Avenir ANR-11-IDEX-0002-02, reference ANR-10-LABX-0037-NEXT (project THETRACOM). For A.R.K. this work was supported in part by Russian Science Foundation through the grant N19-12-00167.
Предметные рубрики: QUANTUM CHAOS
DISTRIBUTIONS
STATISTICS
Аннотация: Depletion dynamics of an open system of weakly interacting fermions with two-body random interactions is studied. In this model, fermions are escaping from the high-energy one-particle orbitals, that mimics the evaporation process used in laboratory experiments with neutral atoms to cool them to ultra-low temperatures. It is shown that due to self-thermalization the system instantaneously adjusts to the new temperature which decreases with the course of time.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ma, Xiaozhou, Suturina, Elizaveta A., Rouzieres, Mathieu, Platunov M. S., Wilhelm, Fabrice, Rogalev, Andrei, Clerac, Rodolphe, Dechambenoit, Pierre
Заглавие : Using Redox-Active pi Bridging Ligand as a Control Switch of Intramolecular Magnetic Interactions
Коллективы : ANRFrench National Research Agency (ANR) [ANR-16-CE29-0001-01]; University of Bordeaux; Region Nouvelle Aquitaine; CNRSCentre National de la Recherche Scientifique (CNRS); MOLSPIN COST actionEuropean Cooperation in Science and Technology (COST) [CA15128]; Chinese Scholarship Council (CSC)China Scholarship Council; EPSRCEngineering & Physical Sciences Research Council (EPSRC) [EP/N006895/1]; IRIDIS High Performance Computing Facility; University of Southampton; RSC
Место публикации : J. Am. Chem. Soc. - 2019. - Vol. 141, Is. 19. - P.7721-7725. - ISSN 0002-7863, DOI 10.1021/jacs.9b03044
Примечания : Cited References: 38. - This work was supported by the ANR (ANR-16-CE29-0001-01, Active-Magnet project), the University of Bordeaux, the Region Nouvelle Aquitaine, the CNRS, the MOLSPIN COST action CA15128 and the Chinese Scholarship Council (CSC) for the PhD funding of X.M. E.A.S. thanks EPSRC for support (EP/N006895/1), the IRIDIS High Performance Computing Facility and associated services at the University of Southampton and RSC for travel grant. The authors thank also S. De, D. Woodruff, P. Perlepe, I. Oyarzabal, and S. Exiga for their assistance and fruitful discussions as well as the GdR MCM-2.
Предметные рубрики: GROUND-STATE
COMPLEXES
Аннотация: Intramolecular magnetic interactions in the dinuclear complexes [(tpy)Ni(tphz)Ni(tpy)]n+ (n = 4, 3, and 2; tpy, terpyridine; tphz, tetrapyridophenazine) were tailored by changing the oxidation state of the pyrazine-based bridging ligand. While its neutral form mediates a weak antiferromagnetic (AF) coupling between the two S = 1 Ni(II), its reduced form, tphz•–, promotes a remarkably large ferromagnetic exchange of +214(5) K with Ni(II) spins. Reducing twice the bridging ligand affords weak Ni–Ni interactions, in marked contrast to the Co(II) analogue. Those experimental results, supported by a careful examination of the involved orbitals, provide a clear understanding of the factors which govern strength and sign of the magnetic exchange through an aromatic bridging ligand, a prerequisite for the rational design of strongly coupled molecular systems and high TC molecule-based magnets.
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