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    Ferroelastic and ferroelectric phase transitions in fluoro- and oxyfluorometallates / I. N. Flerov [и др.] // Photonic and electronic properties of fluoride materials : Elsevier, 2016. - Chapter 16. - P. 355-381. - (Progress in fluorine science series), DOI 10.1016/B978-0-12-801639-8.00016-7. - Cited References: 92. - The reported study was partially supported by RFBR, research project No. 15-02-02009 a
   Перевод заглавия: Сегнетоэластические и сегнетоэлектрические фазовые переходы во фтор- и оксифторидметаллатах

РУБ Chemistry, Organic + Chemistry, Physical
Рубрики:
ELASTIC NEUTRON-DIFFRACTION
   ORIENTATIONAL DISORDER
   CRYSTAL-STRUCTURES
   THERMODYNAMIC PROPERTIES
   NONCRITICAL PARAMETERS
   CUBIC PEROVSKITES
   RAMAN-SCATTERING
   SINGLE-CRYSTALS
   A2BX4 STRUCTURE
   HIGH-RESOLUTION
Аннотация: Different degree of structural disorder is one of the main features of many fluoro- and oxyfluorometallates crystallizing in high symmetry structures. The comprehensive study of these compounds (perovskites, elpasolites, pyrochlores, etc.) enabled to determine a great effect of the size and shape as well as crystallographic sites of cationic and anionic species on the mechanism of structural ordering. Ferroelastic and ferroelectric phase transitions of different order, type, and succession can be realized as a result of chemical and hydrostatic pressure change. It was found that the substitution of monoatomic cations for tetrahedral ammonium group was accompanied by rather significant change of electron density distribution, entropy, and phase diagrams. Some compounds studied were considered to be promising solid-state refrigerants owing to the pronounced barocaloric effect resulting from large entropy and baric coefficient of phase transitions.

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Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Laptash, N. M.
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Heat capacity of the PbFe1/2Ta1/2O3 perovskite-like compound / M. V. Gorev [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 3. - P. 521-525, DOI 10.1134/1.1687872. - Cited References: 26 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
   PBFE0.5TA0.5O3
   FERROELECTRICS
   DIFFRACTION
   NIOBATE
   GROWTH
Аннотация: The heat capacity C-p(T) of the complex perovskite PbFe1/2Ta1/2O3 has been studied using adiabatic calorimetry in the temperature range 150-370 K. Three diffuse anomalies in C-p(T) are found to exist at temperatures T-d approximate to 350 K, T-m approximate to 250-300 K, and T-c approximate to 205 K. The anomalous and the lattice contribution to the heat capacity are separated, and the change in the entropy is determined. The results of the study are discussed jointly with the data on the structure and physical properties of the compound. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, CEMES, F-31055 Toulouse, France
INFM, I-090124 Cagliari, Italy
Dipartimento Fis, I-090124 Cagliari, Italy
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CEMES-CNRS, 29 Rue Jeanne Marvig, Toulouse, 31055, France
Inst. Naz. di Fisica della Materia, Dipartimento di Fisica, Monserrato (Cagliari), 090124, Italy

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Sciau, P.; Lehmann, A. G.
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Magnetic circular dichroism and optical absorption in TmAl3(BO3)(4) / A. V. Malakhovskii [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 1. - P. 34-38, DOI 10.1134/S1063783407010076. - Cited References: 19 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
   SPECTROSCOPY
   TRANSITIONS
   HUNTITE
   GROWTH
Аннотация: The polarized spectra of absorption and magnetic circular dichroism in a TmAl3(BO3)(4) single crystal are studied in the re-ion of H-3(6) - F-3(4), H-3(6) - F-3(3),and H-3(3) - F-3(2) electronic transitions in e Tm3+ ion. The structure of the spectra is interpreted qualitatively. It is shown that the magnetic circular dichroism of the H-3(6) - F-3(4) transition is determined by the contribution from the splitting of the ground state, whereas the magnetic circular dichroism of the H-3(6) - F-3(3) transition is governed by the contribution from the splitting of an excited state in a trigonal crystal field.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sokolov, A. E.; Соколов, Алексей Эдуардович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Temerov, V. L.; Темеров, Владислав Леонидович; Stolbovaya, N. A.; Edelman, I. S.; Эдельман, Ирина Самсоновна
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Abramova, G. M.
Metal-insulator transition, magnetoresistance, and magnetic properties of 3d-sulfides (Review) / G. M. Abramova, G. A. Petrakovskii // Low Temp. Phys. - 2006. - Vol. 32, Is. 8-9. - P. 725-734 ; Физика низких температур, DOI 10.1063/1.2219495. - Cited References: 74 . - ISSN 1063-777X

РУБ Physics, Applied
Рубрики:
GIANT-MAGNETORESISTANCE
   PHASE-TRANSITION
   ALPHA-MNS
   COLOSSAL MAGNETORESISTANCE
   SINGLE-CRYSTALS
   FES-MNS
   SULFIDES
   FERROMAGNETISM
   SEMICONDUCTORS
   TEMPERATURE
Аннотация: The results of a study of the transport and magnetic properties of some sulfides of 3d elements are reported. The concentration transitions with a change of conductivity type and a change of magnetic order are considered, and the features of the colossal magnetoresistance in FexMn1-xS and CuVxCr1-xS2 solid solutions are discussed.

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Держатели документа:
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok 660036, Russian Federation

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Абрамова, Галина Михайловна

}
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Magnetic properties of copper metaborate CuB2O4 / G. A. Petrakovskii [et al.] // Low Temp. Phys. - 2002. - Vol. 28, Is. 8-9. - P. 606-612 ; Физика низких температур, DOI 10.1063/1.1511704. - Cited References: 17 . - ISSN 1063-777X

РУБ Physics, Applied
Рубрики:
SINGLE-CRYSTALS
RESONANCE
STATE
Аннотация: The results of experimental research on the magnetic and resonance properties, heat capacity, muon spin relaxation, and neutron scattering of single-crystal copper metaborate CuB2O4 are reviewed. The results of a symmetry analysis and of modeling by the method of the phenomenological thermodynamic potential are presented. The magnetic structure of the crystal in various temperature intervals of the magnetic ordering region is discussed. (C) 2002 American Institute of Physics.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Paul Scherrer Inst, CH-6232 Villigen, Switzerland
Swiss Fed Inst Technol, Lab Neutron Scattering, CH-6232 Villigen, Switzerland
Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
ИФ СО РАН
L. V. Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Laboratory for Neutron Scattering, ETH Zurich, Paul Scherrer Institute, CH-6232 Villigen PSI, Switzerland
Institut Laue-Langevin, 38042 Grenoble, Cedex 9, France

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Pankrats, A. I.; Панкрац, Анатолий Иванович; Popov, M. A.; Balaev, A. D.; Балаев, Александр Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Sablina, K. A.; Саблина, Клара Александровна; Roessli, B.; Schefer, J.; Amato, A.; Staub, U.; Boehm, M.; Ouladdiaf, B.

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Magnetic properties of aerugite Co10Ge3O16 / L. V. Udod [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 3. - P. 500-504, DOI 10.1134/S1063783407030201. - Cited References: 8 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
Аннотация: This paper reports on the first study of the temperature and field dependences of the magnetization, heat capacity, and electrical properties of synthesized polycrystalline samples of aerugite Co10Ge3O16, as well as on x-ray diffraction analysis of this compound. It is shown that the cobalt ions in this compound occupy three nonequivalent positions. The results of the experimental and theoretical studies suggest that aerugite is a ferrimagnet with two uncompensated magnetic moments of the cobalt atom per formula unit.

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Div, Inst Tomog Ctr, Novosibirsk 630090, Russia
Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
International Tomography Center, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
Institute of Physics, Polish Academy of Sciences, Warsaw, 02-668, Poland

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Vorotynov, A. M.; Воротынов, Александр Михайлович; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Bovina, A. F.; Бовина, Ася Федоровна; Shvedenkov, Y. G.; Baran, M.; Szymczak, R.
}
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    Exploration of the electronic structure of monoclinic α-Eu2(MoO4)3: DFT-based study and X-ray photoelectron spectroscopy / A. H. Reshak [et al.] // J. Phys. Chem. C. - 2016. - Vol. 120, Is. 19. - P. 10559-10568, DOI 10.1021/acs.jpcc.6b01489. - Cited References:85. - This work was partly supported by the Russian Foundation for Basic Research (Grants 15-32-50586 and 15-52-53080). V.V.A. gratefully acknowledges the Ministry of Education and Science of the Russian Federation for the financial support. A.H.R. would like to acknowledge the CENTEM project, reg. no. CZ.1.05/2.1.00/03.0088, cofunded by the ERDF as part of the Ministry of Education, Youth and Sports OP RDI program and, in the follow-up sustainability stage, supported through CENTEM PLUS (LO1402) by financial means from the Ministry of Education, Youth and Sports under the "National Sustainability Programme I". Computational resources were provided by MetaCentrum (LM2010005) and CERIT-SC (CZ.1.05/3.2.00/08.0144) infrastructures. . - ISSN 1932-7447
   Перевод заглавия: Исследование электронной структуры моноклинного альфа-Eu2(MoO4)3: ТФП исследования и рентгеновская фотоэлектронная спектроскопия

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
Density-functional theory
   Solid-solution phosphors
   Luminescence properties
   Optical-properties
   Cleaved surface
   Core levels
   Vibrational properties
   Physical-properties
   Crystal-structure
   Single-crystals
Аннотация: The powder α-Eu2(MoO4)3 sample was prepared by the solid-state reaction method. The phase purity of the final powder product was verified by X-ray diffraction analysis. The constituent element core levels and valence band are measured by X-ray photoelectron spectroscopy as a function of Ar+ ion (2.5 keV, 7-8 μA/cm2) bombardment time. The formation of Mo5+ and Mo4+ states at high bombardment times was detected. The Eu-O and Mo-O bonding was considered in comparison with other Eu3+- and Mo6+-containing oxides using binding energy difference parameters. The transparency range obtained for the pure α-Eu2(MoO4)3 tablet is λ = 0.41-0.97 μm, as estimated at the transmission level of 5%. The short-wavelength cut edge in α-Eu2(MoO4)3 is governed by the direct allowed optical transitions within the band gap of Eg = 3.74 eV (300 K). The band structure of α-Eu2(MoO4)3 was calculated by ab initio methods and strongly different results were obtained for the spin up/down configurations. The Eu-4f states are located around 2.2 eV and -4.0 eV for spin up (↑) and the structures situated at around 6.5 and 5.5 eV for spin down (↓) configuration. The calculated spin magnetic moments are in excellent relation to the Slater-Pauling rule and within the Eu sphere the magnetic moment of 4f electrons is ∼5.99 μB. © 2016 American Chemical Society.

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Держатели документа:
Univ W Bohemia, New Technol Res Ctr, Univ 8, Plzen 30614, Czech Republic.
Univ Malaysia Perlis, Sch Mat Engn, Ctr Excellence Geopolymer & Green Technol, Kangar 01007, Perlis, Malaysia.
King Saud Univ, Coll Sci, Dept Phys & Astron, Riyadh 11451, Saudi Arabia.
Czech Tech Univ, Fac Mech Engn, Dept Instrumentat & Control Engn, Tech 4, Prague 16607 6, Czech Republic.
SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia.
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia.
Novosibirsk State Univ, Lab Semicond & Dielectr Mat, Novosibirsk 630090, Russia.
SB RAS, Baikal Inst Nat Management, Lab Oxide Syst, Ulan Ude 670047, Russia.
Buryat State Univ, Dept Chem, Ulan Ude 670000, Russia.
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
SB RAS, Boreskov Inst Catalysis, Novosibirsk 630090, Russia.
SB RAS, Inst Geol & Mineral, Lab High Pressure Minerals & Diamond Deposits, Novosibirsk 630090, Russia.

Доп.точки доступа:
Reshak, Ali H.; Alahmed, Z. A.; Bila, J.; Atuchin, V. V.; Bazarov, B. G.; Chimitova, O. D.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Prosvirin, Igor P.; Yelisseyev, Alexander P.; Russian Foundation for Basic Research [15-32-50586, 15-52-53080]; Ministry of Education and Science of the Russian Federation; CENTEM project - ERDF as part of the Ministry of Education, Youth and Sports OP RDI program [CZ.1.05/2.1.00/03.0088]; CENTEM PLUS - Ministry of Education, Youth and Sports [LO1402]
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Magnetic circular dichroism analysis of crude oil / I. S. Edelman [et al.] // J. Struct. Chem. - 2016. - Vol. 57, Is. 2. - P. 382-389, DOI 10.1134/S0022476616020207. - Cited References:33. - The work was carried out with the partial support of the grant of the President of the Russian Federation (NSh-2886.2014.2), and in the frameworks of the base budget financing of Kirensky Institute of Physics and Boreskov Institute of Catalysis (Siberian Branch, Russian Academy of Sciences) (V.44.1.15.). . - ISSN 0022-4766. - ISSN 1573-8779

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
Near-UV/visible spectroscopy
   Electron-spin-resonance
   Asphaltene dispersions
   Single-crystals
   Absorption
   VO2+
   EPR
   FLuorescence
   Aggregation
   Absorbency
Кл.слова (ненормированные):
magnetic circular dichroism (MCD) -- MCD spectroscopy -- absorption spectroscopy of oil
Аннотация: Optical and magneto-optical properties of solutions of crude oil of different origin (i.e., taken from different fields) are studied in the visible and near-UV region of optical emission. Magnetic circular dichroism (MCD) spectra of oil are obtained in the vicinity of wavelengths of ~410 nm, 533 nm, and 576 nm. It is demonstrated that the intensity of the MCD signal depends on the origin of crude oil, and it is proportional to the oil concentration in the solution. The comparison of the magneto-optical spectroscopy data with the chemical composition of samples allows us to conclude that the observed magneto-optical activity is determined by the presence of VO2+ complexes in the oil samples studied. The revealed magneto-optical activity of conventional oil can form a basis of a new method for the analysis of the composition and properties of oil of different origin.

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Публикация на русском языке Исследование природной нефти с помощью спектроскопии магнитного кругового дихроизма [Текст] / И. С. Эдельман [и др.] // Журн. структ. химии. - 2016. - Т. 57 № 2. - С. 394-401

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk, Russia.

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A. E.; Соколов, Алексей Эдуардович; Zabluda, V. N.; Заблуда, Владимир Николаевич; Shubin, A. A.; Martyanov, O. N.; Russian Federation [NSh-2886.2014.2]; Kirensky Institute of Physics (Siberian Branch, Russian Academy of Sciences) [V.44.1.15]; Boreskov Institute of Catalysis (Siberian Branch, Russian Academy of Sciences) [V.44.1.15]
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Nonresonant x-ray magnetic scattering on rare-earth iron borates RFe3(BO3)(4) / J. E. Hamann-Borrero [et al.] // Phys. Rev. B. - 2010. - Vol. 82, Is. 9. - Ст. 94411, DOI 10.1103/PhysRevB.82.094411. - Cited References: 38. - This work was supported by the Deustche Forschungsgemeinschaft, through the Forschergruppe FOR520 (Grant No. HE3439/6) and HASYLAB at the Feyerherm from HMI Berlin and specially to Jorg Strempfer from HASYLAB at DESY in Hamburg for valuable discussions. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
   CROSS-SECTION
   GDFE3(BO3)(4)
   NDFE3(BO3)(4)
   DIFFRACTION
   MNF2
Аннотация: Hard x-ray scattering experiments with a photon energy of 100 keV were performed as a function of temperature and applied magnetic field on selected compounds of the RFe3(BO3)4 family. The results show the presence of several diffraction features, in particular, nonresonant magnetic reflections in the magnetically ordered phase and structural reflections that violate the diffraction conditions for the low-temperature phase P3(1)21 of the rare-earth iron borates. The temperature and field dependence of the magnetic superlattice reflections corroborate the magnetic structures of the borate compounds obtained by neutron diffraction. The detailed analysis of the intensity and scattering cross section of the magnetic reflection reveals details of the magnetic structure of these materials such as the spin domain structure of NdFe3(BO3)(4) and GdFe3(BO3)(4). Furthermore we find that the correlation length of the magnetic domains is around 100 angstrom for all the compounds and that the Fe moments are rotated 53 degrees +/- 3 degrees off from the hexagonal basal plane in GdFe3(BO3)(4).

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Держатели документа:
[Hamann-Borrero, J. E.
Philipp, M.
Kataeva, O.
Geck, J.
Klingeler, R.
Buechner, B.
Hess, C.] IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany
[Kataeva, O.] Russian Acad Sci, AE Arbuzov Organ & Phys Chem Inst, Kazan 420088, Russia
[Zimmermann, M. V.] Deutsch Elektronen Synchrotron DESY, Hamburger Synchrotronstrahlungslabor HASYLAB, D-22603 Hamburg, Germany
[Klingeler, R.] Univ Heidelberg, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany
[Vasiliev, A.] Moscow MV Lomonosov State Univ, Fac Phys, Low Temp Phys Dept, Moscow 119992, Russia
[Bezmaternykh, L.] Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Leibniz Institute for Solid State and Materials Research, IFW Dresden, 01171 Dresden, Germany
A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Arbuzov Str. 8, Kazan 420088, Russian Federation
Hamburger Synchrotronstrahlungslabor (HASYLAB), Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22603 Hamburg, Germany
Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227, D-69120 Heidelberg, Germany
Low Temperature Physics Department, Faculty of Physics, Moscow State University, Moscow 119992, Russian Federation
L. V. Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660,0,36, Russian Federation

Доп.точки доступа:
Hamann-Borrero, J. E.; Philipp, M.; Kataeva, O.; Zimmermann, M. V.; Geck, J.; Klingeler, R.; Vasiliev, A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Buchner, B.; Hess, C.
}
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10.

Giant magnetoelectric effect in HoAl3(BO3)(4) / K. C. Liang [et al.] // Phys. Rev. B. - 2011. - Vol. 83, Is. 18. - Ст. 180417, DOI 10.1103/PhysRevB.83.180417. - Cited References: 29. - This work was supported by the DOE, the AFOSR, the T.L.L. Temple Foundation, the J.J. and R. Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
ELECTRIC POLARIZATION
   SINGLE-CRYSTALS
   MULTIFERROICS
   FERROELECTRICITY
   GDFE3(BO3)(4)
   TEMPERATURE
   TBPO4
Аннотация: A giant magnetoelectric polarization is found in HoAl3(BO3)(4). The polarization in transverse field geometry at 70 kOe reaches 3600 mu C/m(2), which is significantly higher than reported values of linear magnetoelectric or even multiferroic compounds. The magnetostrictive effect is also measured and compared with the magnetoelectricity. The results show that spin-lattice coupling in HoAl3(BO3)(4) is extremely strong and that the magnetic field causes a large polar distortion of the ionic positions in the unit cell.

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Держатели документа:
[Liang, K. -C.
Chaudhury, R. P.
Lorenz, B.
Sun, Y. Y.
Chu, C. W.] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA
[Liang, K. -C.
Chaudhury, R. P.
Lorenz, B.
Sun, Y. Y.
Chu, C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA
[Bezmaternykh, L. N.
Temerov, V. L.] Russian Acad Sci, Siberian Div, Inst Phys, Krasnoyarsk 660036, Russia
[Chu, C. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
ИФ СО РАН
Texas Center for Superconductivity, University of Houston and Department of Physics, University of Houston, Houston, TX 77204-5002, United States
Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States

Доп.точки доступа:
Liang, K. C.; Chaudhury, R. P.; Lorenz, B.; Sun, Y. Y.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Temerov, V. L.; Темеров, Владислав Леонидович; Chu, C. W.
}
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11.

Antiferromagnetism of the cation-ordered warwickite system Mn2-xMgxBO4 (x=0.5, 0.6 and 0.7) / N. V. Kazak, N. A. Belskaya, E. M. Moshkina [et al.] // J. Magn. Magn. Mater. - 2020. - Vol. 507. - Ст. 166820, DOI 10.1016/j.jmmm.2020.166820. - Cited References: 39. - The reported study was funded by the Russian Foundation for Basic Research (no. 20-02-00559), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project. 18-42243007. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
   CRYSTAL-STRUCTURES
   SINGLE-CRYSTALS
   INSIGHTS
   MGFEBO4
Кл.слова (ненормированные):
Warwickites -- Antiferromagnet -- Cation ordering -- Jahn-Teller distortions
Аннотация: X-ray diffraction, heat capacity and magnetic measurements are performed on single crystals of Mn2-xMgxBO4 (x = 0.5, 0.6 and 0.7) with the warwickite structure. The monoclinic symmetry is found for all samples with the space group P21/n. The M1 site is occupied by trivalent Mn ions while the M2 site is occupied by a mixture of divalent Mg and Mn ions. Regular cation and charge distributions are observed, which is unusual for heterometallic warwickites. The local octahedral distortions of M1O6 show the monotonic dependence on the Mg content and are in accordance with the Jahn-Teller distortion. All samples are found to undergo long-range antiferromagnetic ordering with rather low transition temperatures of TN = 16, 14 and 13 K for x = 0.5, 0.6, and 0.7, respectively. The ordering of local octahedral distortions, caused by the strong electron-phonon interaction of the trivalent Mn ions, is proposed to stabilise the cationic ordering and, as a result, the long-range magnetic ordering in the material.

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Держатели документа:
FRC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
RAS, Zavoisky Phys Tech Inst, FRC Kazan Sci Ctr, Kazan, Russia.
Kazan Volga Reg Fed Univ, Kazan, Russia.

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Belskaya, N. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Sofronova, S. N.; Софронова, Светлана Николаевна; Eremina, R. M.; Eremin, E. V.; Еремин, Евгений Владимирович; Muftakhutdinov, A. R.; Cherosov, M. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-02-00559]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science to the research project [18-42243007]
}
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12.

Magnetic and magnetodielectric properties of Ho0.5Nd0.5Fe3(BO3)4 / I. A. Gudim [et al.] // Phys. Solid State. - 2018. - Vol. 60, Is. 10. - P. 1989-1998, DOI 10.1134/S1063783418100086. - Cited References: 26. - This study was supported by the Russian Foundation for Basic Research, project no. 17-52-45091 IND_a. . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
SPIN REORIENTATION
SINGLE-CRYSTALS
GDFE3(BO3)4
Аннотация: The magnetic and magnetodielectric properties of Ho0.5Nd0.5Fe3(BO3)4 ferroborate with the competing Ho–Fe and Nd–Fe exchange couplings have been experimentally and theoretically investigated. Step anomalies in the magnetization curves at the spin-reorientation transition induced by the magnetic field B ║ c have been found. The spontaneous spin-reorientation transition temperature TSR ≈ 8 K has been refined. The measured magnetic properties and observed features are interpreted using a single theoretical approach based on the molecular field approximation and calculations within the crystal field model of the rare-earth ion. Interpretation of the experimental data includes determination of the crystal field parameters for Ho3+ and Nd3+ ions in Ho0.5Nd0.5Fe3(BO3)4 and parameters of the Ho–Fe and Nd–Fe exchange couplings.

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Публикация на русском языке Магнитные и магнитодиэлектрические свойства Ho0.5Nd0.5Fe3(BO3)4 [Текст] / И. А. Гудим [и др.] // Физ. тверд. тела. - 2018. - Т. 60 Вып. 10. - С. 1947–1956

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Bryansk State Tech Univ, Bryansk 241035, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.
UGC DAE Consortium Sci Res, Indore 452017, Madhya Pradesh, India.

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Demidov, A. A.; Eremin, E. V.; Еремин, Евгений Владимирович; Shukla, D. K.; Russian Foundation for Basic Research [17-52-45091 IND_a]
}
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13.

Temperature dependence of the spontaneous polarization, acoustic and strain anomalies in strontium barium niobate crystals of different chemical compositions probed by the second harmonic generation technique / A. M. Pugachev, I. V. Zaytseva, V. K. Malinovsky [et al.] // Ferroelectrics. - 2020. - Vol. 560, Is. 1. - P. 54-60, DOI 10.1080/00150193.2020.1722883. - Cited References: 19. - This work was supported by the Russian Foundation for Basic Research, projects no. 18-02-00399 and 19-42-543-016 and State assignment No AAAA-A17-117052410033-9. . - ISSN 0015-0193. - ISSN 1563-5112

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
RELAXOR
GROWTH
Кл.слова (ненормированные):
SBN-x crystals -- polar regions -- ferroelectric phase transition -- second harmonic generation -- Brillouin spectroscopy
Аннотация: In SrxBa1-xNb2O6 crystals (x = 0.33, 0.5, 0.61, and 0.75), temperature dependences of spontaneous polarization, strain, elastic modules, and second harmonic generation (SHG) signal are compared. It is revealed that SHG describes the temperature dependences of dipole moments in polar nanoregions in paraelectric phase. In the vicinity of the phase transition in paraelectric phase, SHG reflects the temperature behavior of relatively large and long-lived polar asymmetric regions as indicated by the presence of the intermediate temperature range on the temperature dependence of this nonlinear response.

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Держатели документа:
Russian Acad Sci, Inst Automat & Electrometry, Novosibirsk, Russia.
Kirensky Inst Phys Fed Res Ctr KSC SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk, Russia.
Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow, Russia.

Доп.точки доступа:
Pugachev, A. M.; Zaytseva, I., V; Malinovsky, V. K.; Surovtsev, N., V; Gorev, M. V.; Горев, Михаил Васильевич; Ivleva, L. I.; Lykov, P. A.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-02-00399, 19-42-543-016, AAAA-A17-117052410033-9]
}
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14.

    Thermophysical properties of lithium thiogallate that are important for optical applications / A. Kurus, A. Yelisseyev, S. Lobanov [et al.] // RSC Adv. - 2021. - Vol. 11, Is. 62. - P. 39177-39187, DOI 10.1039/d1ra05698k. - Cited References: 41. - Crystal growth and investigation of physical properties were supported by Russian Science Foundation, Russia (#19-12-00085). Spectroscopic study was performed on a state assignment of the Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences Russia and Ministry of Science and Higher Education, Russia. Measurements of thermal conductivity were funded by RFBR and Novosibirsk region (grant #20-42-543006\20) . - ISSN 2046-2069
   Перевод заглавия: Теплофизические свойства тиогаллата лития, важные для оптических приложений

РУБ Chemistry, Multidisciplinary
Рубрики:
NON-ENANTIOMORPHOUS CRYSTAL
   MID-IR
   SINGLE-CRYSTALS
   FLASH METHOD
Аннотация: Lithium thiogallate LiGaS2 is one of the most common nonlinear crystals for mid-IR due to its extreme beam strength and wide transparency range; however, its thermophysical properties have not yet been practically studied. Large crystals of high optical quality are grown. DTA revealed features at 1224 K below melting point (1304 K) that are associated with the oxygen containing compounds of the LiGaO2−xSx type. The thermal conductivity of LiGaS2 (about 10.05 W (m−1 K−1)) and band gap value (3.93 eV at 300 K) are found to be the highest in the LiBC2 family. Isotropic points in the dispersion characteristics for the refractive index are found and LiGaS2-based narrow-band optical filters, smoothly tunable with temperature changes, are demonstrated. Intense blue photoluminescence of anionic vacancies VS is observed at room temperature after annealing LiGaS2 in vacuum, whereas orange low-temperature emission is related to self-trapped excitons. When LiGaS2 crystals are heated, spontaneous luminescence (pyroluminescence) takes place, or thermoluminescence after preliminary UV excitation; the parameters of traps of charge carriers are estimated. The obtained data confirm the high optical stability of this material and open up prospects for the creation of new optical devices based on LiGaS2.

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Держатели документа:
Novosibirsk State Univ, 2 Pirogov Str, Novosibirsk 630090, Russia.
SB RAS, Sobolev Inst Geol & Mineral, 3 Kopyug Ave, Novosibirsk 630090, Russia.
SB RAS, Nikolaev Inst Inorgan Chem, 3 Lavrentyev Ave, Novosibirsk 630090, Russia.
SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
SB RAS, Inst Chem & Chem Technol, 42 K Marx Str, Krasnoyarsk 66049, Russia.
SB RAS, Kutateladze Inst Thermophys, 1 Lavrentyev Ave, Novosibirsk 630090, Russia.

Доп.точки доступа:
Kurus, Alexey; Yelisseyev, Alexander; Lobanov, Sergei; Plyusnin, Pavel; Molokeev, M. S.; Молокеев, Максим Сергеевич; Solovyev, Leonid; Samoshkin, Dmitry; Stankus, Sergei; Melnikova, S. V.; Мельникова, Светлана Владимировна; Isaenko, Lyudmila; Russian Science Foundation, RussiaRussian Science Foundation (RSF) [19-12-00085]; RFBRRussian Foundation for Basic Research (RFBR) [20-42-543006\20]; Novosibirsk region [20-42-543006\20]
}
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15.

Electronic and magnetic states of Fe ions in Co2FeBO5 / Y. V. Knyazev, N. V. Kazak, V. S. Zhandun [et al.] // Dalton Trans. - 2021. - Vol. 50, Is. 28. - P. 9735-9745, DOI 10.1039/d1dt00125f. - Cited References: 41. - The authors acknowledge Prof. I. S. Lyubutin for helpful discussions and a critical reading of the manuscript. This research is funded by the Russian Foundation for Basic Research (project no. 20-02-00559 and 21-52-12033), the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (project no. 19-42-240016) and the President Council on Grants (project no. MK-2339.2020.2). The authors acknowledge financial support from the Spanish Ministry of Economy, Industry and Competitiveness (MINECO Grant No. MAT2017-83468-R and from the regional Government of Aragon (E12-20R RASMIA project) . - ISSN 1477-9226. - ISSN 1477-9234

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
TOTAL-ENERGY CALCULATIONS
CRYSTAL-STRUCTURE
SINGLE-CRYSTALS
Аннотация: The ludwigite Co2FeBO5 has been studied experimentally using 57Fe Mössbauer spectroscopy and theoretically using DFT + GGA calculations. The room-temperature Mössbauer spectra are composed of four quadrupole doublets corresponding to the high-spin Fe3+ ions in octahedral oxygen coordination. All components undergo splitting below 117 K due to the magnetic hyperfine fields. The DFT + GGA calculations performed for three models of Fe ion distributions have revealed that the ground state corresponds to the “Fe4(HS)” model with the high-spin Fe3+ ions located at the M4 site and the high-spin Co2+ ions located at the M1, M2, and M3 sites. A ferrimagnetic ground state, with the Co and Fe magnetic moments being nearly parallel to the b-axis and a total magnetic moment of circa 1.1μB f.u.−1, was found. The other Fe distributions cause an increase in the local octahedral distortions and transformation of the spin state. The calculated quadrupole splitting values are in good agreement with the experimental values obtained by Mössbauer spectroscopy.

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Держатели документа:
RAS, SB, KSC, Kirensky Inst Phys,Fed Res Ctr, Krasnoyarsk 660036, Russia.
CSIC, Univ Zaragoza, Inst Nanociencia & Mat Aragon, Zaragoza 50009, Spain.
Dept Fis Mat Condensada, Zaragoza 50009, Spain.
Univ Zaragoza, Serv Medidas Fis, Zaragoza 50009, Spain.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Kazak, N. V.; Казак, Наталья Валерьевна; Zhandun, V. S.; Жандун, Вячеслав Сергеевич; Bartolome, J.; Arauzo, A.; Belskaya, N. A.; Bayukov, O. A.; Баюков, Олег Артемьевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-02-00559, 21-52-12033]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [19-42-240016]; President Council on Grants [MK-2339.2020.2]; Spanish Ministry of Economy, Industry and Competitiveness (MINECO) [MAT2017-83468-R]; regional Government of Aragon (RASMIA project) [E12-20R]
}
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16.

Peschanskii, A. V.
Raman scattering in multiferroic SmFe3(BO3)4 / A. V. Peschanskii, V. I. Fomin, I. A. Gudim // Low Temp. Phys. - 2016. - Vol. 42, Is. 6. - P. 475-483, DOI 10.1063/1.4954783. - Cited References:21 . - ISSN 1063-777X. - ISSN 1090-6517

РУБ Physics, Applied
Рубрики:
SINGLE-CRYSTALS
   MAGNETOELASTIC PROPERTIES
   PHASE-TRANSITIONS
   FERROBORATE
   PHONONS
Аннотация: Raman spectrum of single-crystal SmFe3(BO3)4 was studied in the frequency range from 3 to 1500 cm−1 at temperatures 10–300 K. All the A 1 and E phonon modes predicted by the group theory for a given symmetry of the crystal were observed. The magnitudes of splitting between the LO and TO components of polar E phonons were determined. It was found that under the transition to a magnetically ordered phase, the behavior of the intensity of the line corresponding to the A 1 vibrational mode is anomalous. It was shown that at low temperatures the spectrum of two-magnon excitations has a complex shape and is observed with both nondiagonal and diagonal components of the scattering tensor. This complex shape reflects the features in the density of states of the magnetic branches. An estimate of the magnon energy Em at the Brillouin zone boundary gave ∼47 cm−1. The structure of the ground multiplet 6 H 5/2 of a Sm+3 ion in paramagnetic and antiferromagnetic states as well as the effect of the magnetic phase transition on it were studied. Electron-phonon interaction for the electronic excitation at 225 cm−1 was revealed.

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Публикация на русском языке Песчанский А. В. Рамановское рассеяние света в мультиферроике SmFe3(BO3)4 [Текст] / А. В. Песчанский, В. И. Фомин, И. А. Гудим // Физ. низких температур. - Харьков : Физико-технический институт низких температур им. Б.И. Веркина Национальной академии наук Украины, 2016. - Т. 42 Вып. 6. - С. 607-618

Держатели документа:
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, 47 Nauki Ave, UA-61103 Kharkov, Ukraine.
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Fomin, V. I.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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17.

Magnetostriction of FexMn1-xS (x=0.27) Crystals / G. M. Abramova [et al.] // JETP Letters. - 2009. - Vol. 90, Is. 3. - P. 207-210, DOI 10.1134/S0021364009150107. - Cited References: 19. - This work was supported by the Siberian Branch, Russian Academy of Sciences, and INTAS, joint project no. 06-1000013-9002. . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
ALPHA-MNS
   SINGLE-CRYSTALS
   TRANSITION
   MOSSBAUER
Аннотация: The magnetostriction of FexMn1-xS (x = 0.27) single crystals in strong magnetic fields up to 120 kOe has been investigated. It has been found that the magnetostriction reaches colossal values (+/-3 x 10(-4)) atypical of compounds of 3d elements. It has been found that the magnetostriction changes sign when varying temperature and magnetic field; this behavior indicates an important role of the spin-phonon interactions in the formation of the magnetic order in solid solutions of iron-manganese sulfides.

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Держатели документа:
[Abramova, G. M.
Petrakovskiy, G.
Bovina, A. F.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Zuberek, R.
Nabialek, A.] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[Boem, M.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[Sokolov, V.] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
[Petrakovskiy, G.] Siberian Fed Univ, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Physics, Polish Academy of Sciences, PL-02-668 Warsaw, Poland
Institut Laue-Langevin, Grenoble, France
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russian Federation
Siberian Federal University, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Abramova, G. M.; Абрамова, Галина Михайловна; Petrakovskiy, G. A.; Петраковский, Герман Антонович; Zuberek, R.; Nabialek, A.; Boem, M.; Sokolov, V. V.; Соколов В. В.; Bovina, A. F.; Бовина, Ася Федоровна; Siberian Branch, Russian Academy of Sciences; INTAS [06-1000013-9002]
}
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18.

Crystal growth, structure, magnetic properties and theoretical exchange interaction calculations of Cu2MnBO5 / S. Sofronova [et al.] // J. Magn. Magn. Mater. - 2016. - Vol. 420. - P. 309-316, DOI 10.1016/j.jmmm.2016.07.019. - Cited References: 35. - X-ray diffraction experiment was carried out at the Centre on Molecular Design and Ecologically Safe Technologies at the Novosibirsk State University. The reported study was funded by Russian Foundation for Basic Research (RFBR) and Government of Krasnoyarsk Territory according to the research project No. 16-42-243028. . - ISSN 0304-8853

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
   SINGLE-CRYSTALS
   SUPEREXCHANGE INTERACTIONS
   LUDWIGITE
   DIELECTRICS
   CO3B2O6NI3B2O6
   WARWICKITES
   FE3O2BO3
   IFEFFIT
   NI3B2O6
Кл.слова (ненормированные):
Oxyborates -- Ludwigites -- XMCD -- EXAFS -- Magnetism
Аннотация: Single crystals of ludwigite Cu2MnBO5 were synthesized by flux growth technique. The detailed structural and magnetic characterizations of the synthesized samples have been carried out. The cations composition of the studied crystal was determined using X-ray diffraction and EXAFS technique, the resulting composition differ from the content of the initial Mn2O3–CuO components of the flux. Magnetic susceptibility measurements and the calculations of the exchange integrals in frameworks of indirect coupling model revealed that monoclinic distortions strongly affect exchange interactions and appearance of magnetic ordering phase at the temperature T=93 K. The hypothesis of the existence of several magnetic subsystems was supposed. © 2016 Elsevier B.V.

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Держатели документа:
L.V. Kirensky Institute of Physics, Siberian Branch of Russian Academy of Science, Krasnoyarsk, Russian Federation
M V Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation
V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Institute of Physics, University of Mainz, Mainz, Germany
Institute of Inorganic and Analytical Chemistry, University of Mainz, Mainz, Germany
Lund University, MAX IV Laboratory, Lund, Sweden
National Research Centre “Kurchatov Institute”, Moscow, Russian Federation

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Moshkina, E. M.; Мошкина, Евгения Михайловна; Nazarenko, I. I.; Назаренко, Илья Иванович; Seryotkin, Yu. V.; Nepijko, S. A.; Ksenofontov, V.; Medjanik, K.; Veligzhanin, A. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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19.

    Raman study of HoFe3(BO3)4 at simultaneously high pressure and high temperature: p–T phase diagram / A. S. Krylov [et al.] // J. Raman Spectrosc. - 2017. - Vol. 48, Is. 11. - P. 1406-1410, DOI 10.1002/jrs.5078. - Cited References:35. - Authors are grateful to Prof. A.N. Vtyurin for his valuable discussion. This work was supported by the Russian Foundation for Basic Research (grant no. 17-02-00694) . - ISSN 0377-0486. - ISSN 1097-4555
   Перевод заглавия: Исследование методом комбинационного рассеяния света HoFe3(BO3)4 при одновременном высоком давлении и высокой температуре: фазовая диаграмма p-T

РУБ Spectroscopy
Рубрики:
HYDRATE FORMATION
   SINGLE-CRYSTALS
   WATER SYSTEM
   TRANSITIONS
Кл.слова (ненормированные):
phase transitions -- high hydrostatic pressure -- ferroborates -- p-T phase -- diagram -- nanocrystal
Аннотация: Raman spectra of a HoFe3(BO3)4 crystal chip has been investigated at simultaneously high temperature and high pressure (up to 7.1 GPa and 560 K). On the basis of Raman analysis, the assignment to one of the two possible crystal phases has been made. The experimental p–T phase diagram of HoFe3(BO3)4 was established. An increase in the pressure leads to an increase in the temperature of transition. The phase boundary equation was obtained. Neither triple points nor a phase with new symmetry was revealed in the phase diagram. A critical point with the temperature T = 560 K and the pressure p = 2.53 GPa was found. The nanocrystals with different shapes began to grow on crystal surface after reaching that point. The composition of new nanocrystals is identical to the composition of initial crystal.

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Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Nemtsev, I. V.; Немцев, Иван Васильевич; Krylova, S. N.; Крылова, Светлана Николаевна; Shabanov, A. V.; Шабанов, Александр Васильевич; Krylov, A. A.; International GeoRAMAN Conference(12th ; June 9-15, 2016 ; Novosibirsk, Russia)
}
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20.

Terahertz spectroscopy of crystal-field transitions in magnetoelectric TmAl3(BO3)4 / A. M. Kuzmenko [et al.] // Phys. Rev. B. - 2016. - Vol. 94, Is. 17. - Ст. 174419, DOI 10.1103/PhysRevB.94.174419. - Cited References:35. - This work was partially supported by the Russian Foundation for Basic Research (Grants No. 14-02-91000, No. 15-02-07647, No. 14-02-00307, No. 13-02-12442, and No. 15-42-04186), Sci. school-924.2014.2, and by the Austrian Science Funds (Grants No. I815-N16, No. W-1243, and No. P27098-N27). . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Physics, Condensed Matter
Рубрики:
ELECTRIC POLARIZATION
PHASE-TRANSITIONS
SINGLE-CRYSTALS
Аннотация: Dynamic magnetic properties of magnetoelectric TmAl3(BO3)4 borate have been investigated by terahertz spectroscopy. Crystal-field transitions within the ground multiplet H36 of Tm3+ ions are observed and they are identified as magnetic-dipole transitions from the ground singlet A1 to the next excited doublet E of Tm3+ ions. Unexpected fine structure of the transitions is detected at low temperatures. The new modes are assigned to local distortions of the sites with D3 symmetry by Bi3+ impurities, which resulted in the splitting of the A1→E transition. Two types of locally distorted sites are identified and investigated. The main contribution to the static magnetic susceptibility is shown to be determined by the matrix elements of the observed magnetic transitions. We demonstrate that even in case of local distortions the symmetry of the undistorted crystal is recovered for magnetic and for quadratic magnetoelectric susceptibilities.

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Держатели документа:
Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow 119991, Russia.
Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria.
Siberian Branch RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kuzmenko, A. M.; Mukhin, A. A.; Ivanov, V. Yu.; Komandin, G. A.; Shuvaev, A.; Pimenov, A.; Dziom, V.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [14-02-91000, 15-02-07647, 14-02-00307, 13-02-12442, 15-42-04186]; Sci. school [924.2014.2]; Austrian Science Funds [I815-N16, W-1243, P27098-N27]
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