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Demidov, A. A.
Magnetic properties of Nd 0.6Dy 0.4Fe 3(BO 3) 4 / A. A. Demidov, I. A. Gudim, E. V. Eremin // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P. 261-264, DOI 10.4028/www.scientific.net/SSP.190.261 . - ISBN 9783037854365
Кл.слова (ненормированные):
Multiferroics -- Phase transitions -- Rare-earth ferroborates RFe 3(BO 3) 4 -- Experimental data -- Magnetization curves -- Molecular field approximation -- Multiferroics -- Rare-earth ferroborates RFe -- Spin reorientation transitions -- Spin-flop transitions -- Substituted compounds -- Magnetic materials -- Magnetic properties -- Neodymium -- Phase transitions -- Dysprosium compounds
Аннотация: The magnetic properties of trigonal Nd 0.6Dy 0.4Fe 3(BO 3) 4 substituted compound with the competitive Nd-Fe and Dy-Fe exchange interactions have been investigated. It has been shown that in Nd 0.6Dy 0.4Fe 3(BO 3) 4a spontaneous spin-reorientation transition from an ease-axis state to an easy-plane occurs near 31 K. Anomalies of the magnetization curves are observed in a spin-flop transition induced by the magnetic field B||c. The calculations were performed using a molecularfield approximation and a crystal-field model for the rare-earth subsystem. Extensive experimental data on the magnetic properties of Nd 0.6Dy 0.4Fe 3(BO 3) 4have been interpreted and good agreement between theory and experiment has been achieved using the obtained theoretical dependences. В© (2012) Trans Tech Publications.

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Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
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Magnetization and specific heat of DyFe3(BO3)(4) single crystal / E. A. Popova [et al.] // Eur. Phys. J. B. - 2008. - Vol. 62, Is. 2. - P. 123-128, DOI 10.1140/epjb/e2008-00146-5. - Cited References: 18 . - ISSN 1434-6028

РУБ Physics, Condensed Matter
Рубрики:
IRON
NDFE3(BO3)(4)
GDFE3(BO3)(4)
Кл.слова (ненормированные):
Antiferromagnetic orders -- Iron subsystems -- Antiferromagnetic materials -- Dysprosium compounds -- Magnetic field effects -- Magnetization -- Specific heat -- Thermodynamics -- Single crystals
Аннотация: We present thermodynamic and magnetic studies of single crystalline DyFe3(BO3)(4). The data indicate an easy axis antiferromagnetic order below T-N similar to 38 K which we attribute to the Fe subsystem. The Dy subsystem remains paramagnetic down to the lowest investigated temperatures of 2 K, but it is polarized by the Fe spins due to a f-d interaction. External magnetic field leads to a spin-flop transition in the iron subsystem as well as to superposed magnetization in the Dy subsystem. The repopulation of two low-lying Kramers doublets in Dy3+ ions results in well defined Schottky anomalies in specific heat and magnetization.

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Держатели документа:
Vasiliev, A. N.] Moscow MV Lomonosov State Univ, Low Temp Phys Dept, Moscow 119991, Russia
Klingeler, R.] IFW Dresden, Leibniz Inst Soild State & Mat Res, D-01171 Dresden, Germany
Bezmaternykh, L. N.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Low Temperature Physics Department, Moscow State University, Moscow 119991, Russian Federation
Leibniz Institute for Solid State and Materials Research, IFW Dresden, Dresden 01171, Germany
L.V. Kirensky Institute of Physics, Siberian Branch, RAS, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Popova, E. A.; Tristan, N.; Vasiliev, A. N.; Temerov, V. L.; Темеров, Владислав Леонидович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Leps, N.; Buechner, B.; Klingeler, R.
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Mechanism of magnetic ordering in Dy1-xNix-Nibilayer films / S. G. Ovchinnikov [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 5. - P. 900-904, DOI 10.1134/S1063783407050162. - Cited References: 18. - This work was supported by the Department of Physical Sciences of the Russian Academy of Sciences (program “Spintronics”) and the Siberian Division of the Russian Academy of Sciences (complex integration project no. 3.5) . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
DYSPROSIUM
   MULTILAYERS
   SURFACE
   DY
Кл.слова (ненормированные):
73 -- 20 -- At -- 73 -- 61 -- At -- 75 -- 70 -- -i
Аннотация: A mechanism for the magnetic ordering of dysprosium in Dy1-x Ni (x) -Ni bilayer films is proposed. This ordering was discovered earlier by the authors when studying magnetic circular dichroism. For x exceeding a threshold value (similar to 0.05), the contribution from the Dy1-x Ni (x) layer in a bilayer film to the magnetic circular dichroism over the temperature range 80-300 K is approximately equal in magnitude to the magnetic circular dichroism observed in a single-layer Dy film at temperatures below the ferromagnetic phase transition temperature of Dy (similar to 100 K). Since magnetic circular dichroism is an effect linear in magnetization, the observed effect is associated with magnetic ordering of the Dy1-x Ni (x) layer in bilayer films due to the simultaneous influence of two factors: the incorporation of Ni into the Dy layer and the influence of the continuous Ni sublayer. The ferromagnetic ordering of a dysprosium layer doped with nickel (under conditions of an atomic contact with a continuous nickel layer) was confirmed by the field dependences of the polar and longitudinal Kerr effects. It was shown that both layers in the bilayer structure are magnetized in the same direction and characterized by an anisotropy of the easy-plane type. The magnetic ordering is assumed to be due to the change in the density of states of the Dy1-x Ni (x) alloy caused by hybridization with the narrow peaks near the Fermi level characteristic of nickel.

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Публикация на русском языке Механизм магнитного упорядочения в двухслойных пленках Dy[1-x]Ni[x]-Ni [Текст] / С. Г. Овчинников [и др.] // Физ. тверд. тела. - 2007. - Т. 49 Вып. 5. - С. 854-858

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

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Markov, V. V.; Марков, Владимир Витальевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Seredkin, V. A.; Середкин, Виталий Александрович
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Effect of nickel on the magnetic state of dysprosium in Dy1-xNix-Ni bilayer films / I. S. Edelman [et al.] // Phys. Solid State. - 2003. - Vol. 45, Is. 8. - P. 1493-1499, DOI 10.1134/1.1602886. - Cited References: 21. - This work was supported by the Russian Foundation for Basic Research, project nos. 00-02-16098 and 02-02-06734 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
OPTICAL-PROPERTIES
DY
MULTILAYERS
Аннотация: This paper reports on the results of investigations into the temperature and spectral dependences of the magnetic circular dichroism in Dy1-xNix-Ni bilayer films prepared through thermal sputter deposition of components under ultrahigh vacuum. The distribution of the components over the layer thickness is examined by Auger spectroscopy. The nickel content x in Dy1-xNix layers varies from 0.005 to 0.06. It is shown that, in the temperature range 80-300 K, the contribution made to the magnetic circular dichroism by a Dy1-xNix layer in a bilayer film with a nickel content higher than the threshold value is approximately equal to the magnetic circular dichroism observed in an isolated Dy1-xNix film at temperatures below the temperature of the phase transition to a ferromagnetic state (similar to100 K). This phenomenon is explained by magnetic ordering in theDy(1-x)Ni(x) layer of the bilayer film due to the combined effect of two factors, namely, the incorporation of nickel into a dysprosium layer and the presence of a continuous nickel sublayer in the film. (C) 2003 MAIK "Nauka/Interperiodica".

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Публикация на русском языке Влияние Ni на магнитное состояние Dy в двухслойных пленках Dy[1-x]Ni[x]-Ni [Текст] / И. С. Эдельман [и др.] // Физ. тверд. тела. - 2003. - Т. 45 Вып. 8. - С. 1423-1428

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Semicond Phys, Siberian Div, Novosibirsk 630090, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent'eva 13, Novosibirsk 630090, Russian Federation

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Markov, V. V.; Марков, Владимир Витальевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Khudyakov, A. E.; Zabluda, V. N.; Заблуда, Владимир Николаевич; Kesler, V. G.; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич
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    Hydrothermal crystallization of a Ln2(OH)4SO4·nH2O layered compound for a wide range of Ln (Ln = La-Dy), thermolysis, and facile transformation into oxysulfate and oxysulfide phosphors / X. Wang [et al.] // RSC Adv. - 2017. - Vol. 7, Is. 22. - P. 13331-13339, DOI 10.1039/c7ra00645d. - Cited References: 54. - This work was partly supported by the National Natural Science Foundation of China (Grants No. 51672039, 51172038, and 51302032), the Fundamental Research Fund for the Central Universities (Grant No. N140204002), the Grants-in-Aid for Scientific Research (KAKENHI No. 26420686), and the Russian Foundation for Basic Research (15-52-53080). Xuejiao Wang acknowledges the financial support received from the China Scholarship Council for her overseas Ph. D. study at the National Institute of Materials Science (Contract No. 201406080035). . - ISSN 2046-2069
   Перевод заглавия: Гидротермальная кристаллизация слоистых соединений Ln2(OH)4SO4·nH2O с широким диапазоном Ln (Ln = La-Dy), термолиз и плавный переход в оксисульфатные и оксисульфидные люминофоры
Кл.слова (ненормированные):
Dysprosium -- Hydrothermal synthesis -- Light emission -- Phase structure -- Phosphors -- Rare earth elements -- Acceleration voltages -- Chemical compositions -- Electron beam irradiation -- Hydrothermal conditions -- Hydrothermal crystallization -- Lanthanide contraction -- Photoluminescence properties -- Structure refinements -- Dysprosium compounds
Аннотация: The synthesis of a layered Ln2(OH)4SO4·nH2O material (Ln-241) with a smaller lanthanide ion (Dy3+) was successfully achieved through the optimization of the hydrothermal conditions, and the effect of lanthanide contraction on the chemical composition, phase structure, and crystallite/particle morphology of the products was investigated and discussed. Structure refinement showed that the lattice parameters (a, b, and c), cell volume, and axis angle across the series (Ln = La-Dy) monotonously decrease as the size of Ln3+ decreases. Comparative TG/DTA analysis in air indicated that the dehydroxylation temperature of Ln-241 tends to increase, whereas the dehydration and desulfurization temperatures decrease as the size of Ln3+ decreases, thus narrowing the stable temperature range for Ln2O2SO4. Taking advantage of the fact that Ln-241 has exactly the same Ln/S molar ratio as Ln2O2SO4 and Ln2O2S, the latter two groups of important compounds (excluding Ce) were facilely transformed from the former via the removal of water by calcination. The photoluminescence properties of Eu3+ and Tb3+, in terms of excitation, emission, fluorescence decay, quantum yield, and emission color, were investigated and compared for the two hosts Gd2O2S and Gd2O2SO4, and the (Gd0.99Tb0.01)2O2S phosphor was shown to be stable under electron beam irradiation in the studied range and exhibited an increasingly higher emission brightness as the acceleration voltage (up to 7 kV) or beam current (up to 50 μA) increased.

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Держатели документа:
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang, Liaoning, China
Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, China
Research Centre for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
College of New Energy, Bohai University, Jinzhou, Liaoning, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, China
World Premier International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japan

Доп.точки доступа:
Wang, X.; Li, J. -G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, W.; Zhu, Q.; Tanaka, H.; Suzuta, K.; Kim, B. -N.; Sakka, Y.
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