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ACOUSTIC PROPERTIES OF TERBIUM FERRITE-GARNET AT LOW-TEMPERATURES / O. P. KVASHNINA [и др.] // Fiz. Tverd. Tela. - 1984. - Vol. 26, Is. 8. - P. 2408-2410. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
KVASHNINA, O. P.; KAPITONOV, A. M.; SMOKOTIN, E. M.; TITOVA, A. G.
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Patrin, G. S.
The ''easy plane easy axis'' transition in alpha-Fe2O3:Ga crystals induced by doping with terbium ions / G. S. Patrin, N. V. Volkov, V. N. Vasiliev // Phys. Lett. A. - 1997. - Vol. 230, Is. 1-2. - P. 96-98, DOI 10.1016/S0375-9601(97)00219-3. - Cited References: 10 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary

Аннотация: In easy plane weak ferromagnetic alpha-Fe2O3:Ga crystals it was found that doping with a hundredth part of To ions leads to the restoration of the transition into the ''easy axis'' magnetic state. It was established that in the alpha-Fe2O3:Ga, Tb crystal the angular magnetic phase is realized. (C) 1997 Published by Elsevier Science B.V.

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Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Vasiliev, V. N.; Патрин, Геннадий Семёнович
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Magnetic structure, magnetic interactions and metamagnetism in terbium iron borate TbFe3(BO3)(4): a neutron diffraction and magnetization study / C. . Ritter [et al.] // J. Phys.: Condens. Matter. - 2007. - Vol. 19, Is. 19. - Ст. 196227, DOI 10.1088/0953-8984/19/19/196227. - Cited References: 15 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
GDFE3(BO3)(4)
Кл.слова (ненормированные):
Magnetic structure -- Magnetic susceptibility -- Metamagnetism -- Neutron diffraction -- Neutron scattering -- Phase transitions -- Aneutron diffraction -- Magnetic interactions -- Neutron scattering measurements -- Terbium iron borate -- Terbium compounds
Аннотация: Magnetization, susceptibility and neutron scattering measurements were performed on the terbium iron borate TbFe3(BO3)(4). Structural and magnetic phase transitions were obtained as a function of external magnetic field and temperature. A metamagnetic transition of the terbium spins and a spin-flop transition of the iron sublattice are obtained at an external magnetic field 35 kOe < Ht < 60 kOe. The values of the effective exchange HE and the anisotropy HA fields are evaluated. Temperature dependent neutron diffraction studies reveal the magnetic structure of TbFe3(BO3)(4) and the thermal evolution of the two magnetic sublattices. An antiferromagnetic coupling along the helicoidal chains of Fe atoms sets in at 40 K with a propagation vector k = [ 0 0 1/2]. The magnetic ordering of the Tb sublattice sets in at the same temperature and leads to an anti-parallel alignment of the Fe and Tb moments within the a-b-planes with mu(Fe) = 4.4 mu(B) and mu(Tb) = 8.6 mu(B) at 2 K.

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Держатели документа:
Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute Laue-Langevin, Boite Postale 156, F-38042 Grenoble, France
L v Kirenskii Institute of Physics, Siberian Branch, RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Ritter, C.; Balaev, A. D.; Балаев, Александр Дмитриевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна
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Zeeman effect and stark splitting of the electronic states of the rare-earth ion in the paramagnetic terbium garnets Tb3Ga5O12 and Tb3Al5O12 / U. V. Valiev [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 1. - P. 91-98, DOI 10.1134/S1063783407010167. - Cited References: 14 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
YTTRIUM-ALUMINUM-GARNET
   SELECTIVE POLARIZED SPECTROSCOPY
   CRYSTAL-FIELD ANALYSIS
   GALLIUM GARNET
Аннотация: The Zeeman effect in the F-7(6) - D-5(4) absorption band of the Tb3+ ion in the paramagnetic garnets Tb3Ga5O12 and Tb3Al5O12 was Studied. The field dependences of the Zeeman splitting of some absorption lines arc found to exhibit unusual behavior: as the magnetic field increases, the hand splitting decreases rather than increases. Symmetry analysis relates these lines to 4f - 4f electron transitions of the doublet-quasi-doublet or quasi-doublet-doublet type, for which the field dependences of the splitting differ radically from the well-known field dependences of the Zeeman splitting for quasi-doublet-quasi-doublet or quasi-doublet-singlet transitions in a longitudinal magnetic field.

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Держатели документа:
Natl Univ Uzbekistan, Tashkent 700174, Uzbekistan
Univ Texas, San Antonio, TX 78249 USA
ARL, Adelphi Lab Ctr, Adelphi, MD 20783 USA
Natl Acad Sci Ukraine, Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
National University of Uzbekistan, Tashkent 700174, Uzbekistan
University of Texas at San Antonio, San Antonio, TX 78249-0697, United States
ARL, Adelphi Laboratory Center, Adelphi, MD 20783-1197, United States
Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, pr. Lenina 47, Kharkov, 61103, Ukraine
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Valiev, U. V.; Gruber, J. B.; Sardar, D. K.; Zandi, B.; Kachur, I. S.; Mukhammadiev, A. K.; Piryatinskaya, V. G.; Sokolov, V. Y.; Edelman, I. S.; Эдельман, Ирина Самсоновна
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Magnetic structure and magnetic interactions in terbium iron borate TbFe3(BO3)4 / A. Vorotynov, C. Ritter [и др.] // Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project "New Layered 3d-Materials for Spintronics" : (books of abstrats) : March 20-23, 2007 Krasnoyarsk, Russia. - Красноярск, 2007. - P. 13

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Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр, Михайлович; Ritter, C.; Petrakovskii, G. A.; Петраковский, Герман Антонович; Balaev, A. D.; Балаев, Александр Дмитриевич; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина, Анатольевна; "New Layered 3d-Materials for Spintronics", Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project(2007 ; Marh ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН; ETH Zurich and Paul Scherrer Institute, Condensed Matter Research with Neutron and Muons Department; Institute of Physics of Polish Academy of Sciences; Институт неорганической химии им. А.В.Николаева СО РАН
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Magnetic structure and magnetic interactions in terbium iron borate TbFe3(BO3)4 / A. M. Vorotynov [et al.] // Workshop INTAS - Sib. Branch of the RAS Sci. Cooperation on the Res. Project “New Layered 3d-Materials for Spintronics” / chairman G. A. Petrakovskii. - 2007. - P. 13
Аннотация: INTAS (The International Association for the Promotion of Cooperation with Scientists from the New Independent States of the Former Soviet Union) — международная ассоциация по содействию сотрудничеству с учёными новых независимых государств бывшего Советского Союза. Некоммерческая организация, финансировалась главным образом из бюджета Европейского Союза. Являлась крупнейшим фондом, поддерживающим научное сотрудничество между учёными стран бывшего СССР и Европейского Союза с 1993 г. Программы INTAS охватывали широкий круг научно-исследовательских проблем. 22 сентября 2006 года было принято решение о прекращении осуществления программы на основании рекомендации Европейской Комиссии. С 1 апреля 2007 года прекратилось распределение новых грантов.

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Доп.точки доступа:
Petrakovskii, G. A. \chairman\; Петраковский, Герман Антонович; Vorotynov, A. M.; Воротынов, Александр Михайлович; Ritter, C.; Petrakovskii, G. A.; Balaev, A. D.; Балаев, Александр Дмитриевич; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна; "New Layered 3d-Materials for Spintronics", Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project(2007 ; March 20-23 ; Krasnoyarsk)
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Magnetoelastic effects in terbium ferroborate / G. A. Zvyagina [et al.] // Low Temp. Phys. - 2008. - Vol. 34, Is. 11. - P. 901-908 ; Физика низких температур, DOI 10.1063/1.3009584. - Cited References: 17 . - ISSN 1063-777X

РУБ Physics, Applied
Рубрики:
CRYSTAL-STRUCTURE
ND
Кл.слова (ненормированные):
acoustic wave velocity -- antiferromagnetic materials -- elastic moduli -- exchange interactions (electron) -- iron compounds -- magnetoelastic effects -- solid-state phase transformations -- terbium compounds
Аннотация: The behavior of the elastic moduli and sound absorption in a terbium orthoborate single crystal at low temperatures is studied. The components of the tensor of the elastic moduli of this system are determined. A structural phase transition and a transition of the magnetic subsystem into an antiferromagnetically ordered state appear in the temperature dependences of the sound velocities and absorption. The magnetic field dependences of the velocities of transverse sound exhibit singularities in the form of jumps at a magnetic field equal to the field of the spin-flop transition of the antiferromagnetic subsystem. Theoretical analysis shows that the observed behavior of the acoustic characteristics are associated not with the rare-earth subsystem of ferroborate but rather with the renormalization of the exchange interaction between iron ions as a result of the magnetoelastic coupling.

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Держатели документа:
[Zvyagina, G. A.
Zhekov, K. R.
Bilych, I. V.
Zvyagin, A. A.] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[Bezmaternykh, L. N.
Gudim, I. A.] Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
B. I. Verkin Institute for Low-Temperature Physics and Engineering, National Academy of Sciences of Ukraine, pr. Lenina 47, Kharkov 61103, Ukraine
L. V. Kirenskii Institute of Physics, Siberian Branch, Russian Adcademy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Zvyagina, G. A.; Zhekov, K. R.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Bilych, I. V.; Zvyagin, A. A.

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Magnetic anisotropy and magnetoelectric properties of Tb1-x Er (x) Fe-3(BO3)(4) ferroborates / A. K. Zvezdin [et al.] // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 1. - P. 68-73, DOI 10.1134/S1063776109070097. - Cited References: 18. - This study was supported by the Russian Foundation for Basic Research (project no. 07-02-00580). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
GDFE3(BO3)(4)
Кл.слова (ненормированные):
Competing exchange -- Complex compositions -- Critical fields -- Electric polarization -- Er concentrations -- Exchange splitting -- Ferroborates -- G factors -- Magnetoelectric properties -- Nonmonotonic -- Simple model -- Spin-flop transitions -- Composite micromechanics -- Erbium -- Ions -- Magnetic anisotropy -- Magnetostriction -- Magnetostrictive devices -- Phase transitions -- Polarization -- Spin dynamics -- Terbium alloys -- Single crystals
Аннотация: Magnetic and magnetoelectric properties of ferroborate single crystals with complex composition (Tb1 - x Er (x) Fe-3(BO3)(4), x = 0, 0.75) and with competing exchange Tb-Fe and Er-Fe interactions are investigated. Jumps in electric polarization, magnetostriction, and magnetization are observed as a result of spin-flop transitions, as well as a considerable decrease in the critical field upon an increase in the Er concentration, in a field H (c) parallel to the c axis. The observed behavior of phase-transition fields is analyzed and explained using a simple model taking into account anisotropy in g factors and exchange splitting of funda-mental doublets of the easy-axis Tb3+ ion and easy-plane Er3+ ion. It is established that magnetoelectric and magnetostriction anomalies under spin-flop transitions are mainly controlled by the Tb subsystem. The Tb subsystem makes a nonmonotonic contribution Delta P (a) (H (a) , T) to polarization along the a axis: the value of Delta P (a) reverses its sign and increases with temperature due to the contribution from the excited states of the Tb3+ ion.

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Держатели документа:
[Zvezdin, A. K.
Pyatakov, A. P.
Ivanov, V. Yu.
Kuz'menko, A. M.
Mukhin, A. A.] Russian Acad Sci, Prokhorov Inst Gen Phys, Moscow 119991, Russia
[Kadomtseva, A. M.
Popov, Yu. F.
Vorob'ev, G. P.
Pyatakov, A. P.] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
[Bezmaternykh, L. N.
Gudim, I. A.] Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660038, Russia
ИФ СО РАН
Moscow State University, Moscow 119992, Russian Federation
Prokhorov Institute of General Physics, Russian Academy of Sciences, Moscow 119991, Russian Federation
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660038, Russian Federation

Доп.точки доступа:
Zvezdin, A. K.; Kadomtseva, A. M.; Popov, Y. F.; Vorob'ev, G. P.; Pyatakov, A. P.; Ivanov, V. Y.; Kuz'menko, A. M.; Mukhin, A. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [07-02-00580]
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High-temperature magnetoelectricity of terbium aluminum borate: The role of excited states of the rare-earth ion / A. M. Kadomtseva [et al.] // Phys. Rev. B. - 2014. - Vol. 89, Is. 1. - Ст. 014418, DOI 10.1103/PhysRevB.89.014418. - Cited References: 25. - We thank Dr. Daniel Sando for useful comments and remarks. This work is supported by the Russian Foundation for Basic Research (Projects No. 13-02-01093, No. 13-02-12443, No. 13-02-01093, No. 12-02-01261, and No. 13-02-12442) and a grant from the Russian Federation President on support of sciences schools no. 4828.2012.2, The Ministry of Education and Science of Russian Federation, Project No. 8365. . - ISSN 1098-0121. - ISSN 1550-235X

РУБ Physics, Condensed Matter
Рубрики:
GROUND-STATE
PRFE3(BO3)4
MULTIFERROICS
Аннотация: Recently discovered magnetoelectricity in the rare-earth aluminum borates RAl3(BO3)4 has attracted attention due to the large values of magnetoinduced electric polarization. We have observed for the first time the magnetoelectric polarization in TbAl3(BO3)4 exhibiting anomalous temperature dependence: an electric polarization induced by in-plane magnetic field (P||a,H⊥c axis) which is small at low temperatures (4K), remarkably increases by almost an order of magnitude at high temperatures (150–300K). The observed nonmonotonic temperature behavior of the field-induced polarization, including a change of sign at ∼65–70K, is attributed to the competition of the ground and excited crystal-field states of Tb3+ ions. Quantum theory analysis, involving the combination of analytical and numerical methods, has enabled us to quantitatively describe the observed magnetic and magnetoelectric properties of TbAl3(BO3)4.
Недавно обнаруженное магнетоэлектричество в редкоземельных алюмоборатах RAl3 (BO3) 4 привлекло к себе внимание из-за больших значений магнитоиндуцированной электрической поляризации. Мы наблюдали в первый раз магнитоэлектрическую поляризацию в TbAl3 (BO3) 4, показывающую аномальную температурную зависимость: электрическая поляризация индуцируется в плоскости магнитного поля (Р | |, Н ⊥ оси с), и является небольшой при низких температурах (4K), Значительно увеличивается, почти на порядок величины, при высоких температурах (150-300 К). Наблюдаемая с изменением температуры немонотонность поляризации от поля, в том числе изменению знака на ~ 65-70 К, может быть отнесена к конкуренции между основном и возбужденном кристаллическим полем состояниями ионов ТЬ3 +. Теория квантового анализа, предполагающей сочетание аналитических и численных методов, позволила нам количественно описать наблюдаемые магнитные и магнитоэлектрические свойства TbAl3 (BO3) 4.

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Держатели документа:
Moscow MV Lomonosov State Univ, MSU, Dept Phys, Moscow 119992, Russia
Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow, Russia
State Univ, Moscow Inst Phys & Technol, Moscow, Russia
Natl Res Univ Elect Technol MIET, Zelenograd, Russia
RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Kadomtseva, A. M.; Popov, Y. F.; Vorob'ev, G. P.; Kostyuchenko, N. V.; Popov, A. I.; Mukhin, A. A.; Ivanov, V. Y.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; Pyatakov, A. P.; Zvezdin, A. K.; Russian Foundation for Basic Research [13-02-12443, 13-02-01093, 12-02-01261, 13-02-12442]; Russian Federation President on support of sciences schools [4828.2012.2]; Ministry of Education and Science of Russian Federation [8365]
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10.

    Synthesis and spectroscopic properties of multiferroic β΄-Tb2(MoO4)3 / V. V. Atuchin [et al.] // Opt. Mater. - 2014. - Vol. 36, Is. 10. - P. 1631–1635, DOI 10.1016/j.optmat.2013.12.008. - Cited References: 43. - This study was partly supported by SB RAS under Projects 28.13 and 24.31, and by the PSB RAS Project No. 3.9.5b, and RFBR Projects . - ISSN 0925-3467. - ISSN 1873-1252
   Перевод заглавия: Синтез и спектроскопические свойства мультиферроика β'-Tb2(MoO4)3
Рубрики:
FERROELECTRIC-FERROELASTIC Tb2(MoO4)3
   STIMULATED RAMAN-SCATTERING
   TRANSITION-METAL MOLYBDATES
   RARE-EARTH MOLYBDATES
   CRYSTAL-STRUCTURE
   VIBRATIONAL PROPERTIES
   LUMINESCENCE PROPERTIES
   Tb-2(MoO4)3 CRYSTALS
   TERBIUM MOLYBDATE
   PHASE-TRANSITIONS
Кл.слова (ненормированные):
Terbium molybdate -- Raman spectrum -- Optical properties
Аннотация: Orthorhombic terbium molybdate, β΄-Tb2(MoO4)3, microcrystals have been fabricated by solid state synthesis at T = 750-1270 K for t = 290 h. The crystal structure β΄-Tb2(MoO4)3 has been refined by Rietveld method in space group Pba2 with cell parameters of a = 10.35387(6), b = 10.38413(6) and c = 10.65695(7) A (RB = 1.83%). About 40 narrow Raman lines have been observed in the Raman spectrum recorded for the β΄-Tb2(MoO4)3 powder sample. The luminescence spectrum of β΄-Tb2(MoO4)3 has been measured under the excitation at 355 nm, and the intensive photoluminescence band at 540-550 nm has been found. В© 2013 Elsevier Ltd. All rights reserved.

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Grinberg, M. \ed.\; Bojarski, P. \ed.\; Suchocki, A. \ed.\; Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chimitova, O. D.; Krylov, A. S.; Крылов, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bazarov, B. G.; Bazarova, J. G.; Xia, Zhiguo; International Workshop on Advanced Spectroscopy and Optical Materials (4th ; 14–19 July 2013 ; Gdańsk, Poland)
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