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Magnetization and specific heat of TbFe3(BO3)(4): Experiment and crystal-field calculations / E. A. Popova [et al.] // Phys. Rev. B. - 2007. - Vol. 75, Is. 22. - Ст. 224413, DOI 10.1103/PhysRevB.75.224413. - Cited References: 22 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
GDFE3(BO3)(4)
MAGNETOSTRICTION
Аннотация: We have studied the thermodynamic properties of single-crystalline TbFe3(BO3)(4). Magnetization measurements have been carried out as a function of magnetic field (up to 50 T) and temperature up to 350 K with the magnetic field both parallel and perpendicular to the trigonal c axis of the crystal. The specific heat has been measured in the temperature range 2-300 K with a magnetic field up to 9 T applied parallel to the c axis. The data indicate a structural phase transition at 192 K and antiferromagnetic spin ordering at T-N approximate to 40 K. A Schottky anomaly is present in the specific-heat data around 20 K, arising due to two low-lying energy levels of the Tb3+ ions being split by f-d coupling. Below T-N, magnetic fields parallel to the c axis drive a spin-flop phase transition, which is associated with a large magnetization jump. The highly anisotropic character of the magnetic susceptibility is ascribed mainly to the Ising-like behavior of the Tb3+ ions in the trigonal crystal field. We describe our results in the framework of a unified approach which is based on mean-field approximation and crystal-field calculations.

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Держатели документа:
Moscow MV Lomonosov State Univ, Fac Phys, Low Temp Phys Dept, Moscow 119992, Russia
Bryansk State Tech Univ, Bryansk 241035, Russia
RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany
ИФ СО РАН
Low Temperature Physics Department, Physics Faculty, Moscow State University, 119992 Moscow, Russian Federation
Bryansk State Technical University, 241035 Bryansk, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch of RAS, 660036 Krasnoyarsk, Russian Federation
Leibniz-Institute for Solid State and Materials Research, IFW Dresden, 01171 Dresden, Germany

Доп.точки доступа:
Popova, E. A.; Volkov, D. V.; Vasiliev, A. N.; Demidov, A. A.; Kolmakova, N. P.; Gudim, I. A.; Гудим, Ирина Анатольевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Tristan, N.; Skourski, Y.; Buchner, B.; Hess, C.; Klingeler, R.
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Magnetic properties of Nd0.6Dy0.4Fe3(B03)4 / A. A. Demidov, I. A. Gudim, E. V. Eremin // Moscow Int. Symp. on Magnet. (MISM-2011) : Book of abstracts. - 2011. - Ст. 23PO-K-7. - P. 477-478

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Доп.точки доступа:
Demidov, A. A.; 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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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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Demidov, A. A.
Magnetic Properties of Sm0.7Ho0.3Fe3(BO3)4 / A. A. Demidov, I. A. Gudim, E. V. Eremin // J. Exp. Theor. Phys. - 2012. - Vol. 115, Is. 5. - P. 815-828, DOI 10.1134/S1063776112100020. - Cited References: 31 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPIN REORIENTATION
   EARTH
   GDFE3(BO3)4
   SMFE3(BO3)4
Аннотация: The magnetic properties of a ferroborate single crystal of substituted composition Sm0.7H0.3Fe3(BO3)4 with competing Sm-Fe and Ho-Fe exchange interactions are studied. The measured properties and effects are interpreted in terms of a general theoretical approach based on the molecular field approximation and calculations using the crystal field model for a rare-earth ion. The experimental temperature dependences of the initial magnetic susceptibility in the temperature range 2-300 K, the anomalies in the magnetization curves for B aEuro- c and B aSyen c in fields lower than 1.2 T, and the field and temperature dependences of magnetization in fields lower than 9 T are described. The crystal field parameters and the parameters of the R-Fe and Fe-Fe exchange interactions are determined during the interpretation of the experimental data.

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Публикация на русском языке Демидов, А. А. Особенности магнитных свойств Sm0.7Ho0.3Fe3( BO3)4 / А. А. Демидов // Журнал экспериментальной и теоретической физики : Издательство "Наука", 2012. - Т. 142, № 5. - С. 928-942. - ISSN 0044-4510

Держатели документа:
[Demidov, A. A.] Bryansk State Tech Univ, Bryansk 241035, Russia
[Gudim, I. A.
Eremin, E. V.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660038, Russia

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович
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Demidov, A. A.
Magnetic phase transitions in Nd1−xDyxFe3(BO3)4 ferroborates / A. A. Demidov, I. A. Gudim, E. V. Eremin // J. Exp. Theor. Phys. - 2012. - Vol. 114, Is. 2. - P. 259-272, DOI 10.1134/S1063776111160023. - Cited References: 29. - This study was supported financially by the President of the Russian Federation (grant no. MK-497.2010.2). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPIN REORIENTATION
   CRYSTAL
   DY
   ND
Аннотация: The magnetic properties of ferroborate single crystals with substituted compositions Nd1−xDyxFe3(BO3)4 (x = 0.15, 0.25) with competing exchange Nd-Fe and Dy-Fe interactions are investigated. For each composition, we observed a spontaneous spin-reorientation transition from the easy-axis to the easy-plane state and step anomalies on the magnetization curves for the spin-flop transition induced by a magnetic field B | c. The measured parameters and effects are interpreted using a unified theoretical approach based on the molecular field approximation and on calculations performed in the crystal-field model for the rare-earth ion. The experimental temperature dependences of the initial magnetic susceptibility from T = 2 K to T = 300 K, anomalies on the magnetization curves for B | c in fields up to 1.8 T, and their evolution with temperature, as well as temperature and field dependences of magnetization in fields up to 9 T are described. In the interpretation of experimental data, the crystal-field parameters in trigonal symmetry for the rare-earth subsystem are determined, as well as the parameters of Nd-Fe and Dy-Fe exchange interactions.

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Публикация на русском языке Демидов, А. А. Магнитные фазовые переходы в ферроборатах Nd1-xDyxFe3(BO3)4 / А. А. Демидов // Журнал экспериментальной и теоретической физики : Издательство "Наука", 2012. - Т. 141, N 2. - С. 294-309. - ISSN 0044-4510

Держатели документа:
[Demidov, A. A.] Bryansk State Tech Univ, Bryansk 241035, Russia
[Gudim, I. A.
Eremin, E. V.] Russian Acad Sci, Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660038, Russia

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Демидов А. А.
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Demidov, A. A.
Magnetic properties of Nd0.9Dy0.1Fe3(BO3)4 / A. A. Demidov, I. A. Gudim, E. V. Eremin // Physica B. - 2012. - Vol. 407, Is. 3. - P. 393-397, DOI 10.1016/j.physb.2011.11.004. - Cited References: 18. - This study was supported, in part, by Russian Federation's President Grant MK-497.2010.2 (A.A.D.). . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
NDFE3(BO3)4
HOFE3(BO3)4
MULTIFERROICS
Кл.слова (ненормированные):
Phase transitions -- Rare-earth ferroborates RFe3(BO3) 4 -- Multiferroics
Аннотация: The magnetic properties of trigonal Nd0.9Dy0.1Fe3(BO3)4 substituted compound with the competitive Nd–Fe and Dy–Fe exchange interactions have been investigated. It has been shown that in Nd0.9Dy0.1Fe3(BO3)4 a spontaneous spin-reorientation transition from an ease-axis state to an easy-plane occurs near 8 K. Anomalies of the magnetization curves are observed in a spin-flop transition induced by the magnetic field B II c. The calculations were performed using a molecular-field approximation and a crystal-field model for the rare-earth subsystem. Extensive experimental data on the magnetic properties of Nd0.9Dy0.1Fe3(BO3)4 have been interpreted and good agreement between theory and experiment has been achieved using the obtained theoretical dependences.

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Держатели документа:
[Demidov, A. A.] Bryansk State Tech Univ, Bryansk 241035, Russia
[Gudim, I. A.
Eremin, E. V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович
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Magnetic properties of the Nd0.95Dy0.05Fe 3(BO3)4 ferroborate with small substitution in the rare-earth element subsystem / A. I. Begunov [et al.] // J. Exp. Theor. Phys. - 2013. - Vol. 117, Is. 5. - P. 862-874, DOI 10.1134/S1063776113120108 . - ISSN 1063-7761
Аннотация: The magnetic properties of a substituted Nd0.95Dy 0.05Fe3(BO3)4 ferroborate single crystal with competing Nd-Fe and Dy-Fe exchange interactions are studied experimentally and theoretically. A spontaneous spin-reorientation transition is detected near T = 4.3 K, and anomalies are observed in the low-temperature magnetization curves along trigonal axis c and in basal plane ab. The measured properties and the detected effects are interpreted in terms of a general theoretical approach, which is based on the molecular field approximation and crystal field calculations for a rare-earth ion. The experimental temperature dependences of the initial magnetic susceptibility in the range 2-300 K, the anomalies in the magnetization curves for B â€- c and B âŠ¥ c in fields up to 1.5 T, and the field and temperature dependences of magnetization in fields up to 9 T are described. The effect of small substitution in the rare-earth subsystem on the magnetic properties is analyzed. The crystal field parameters and the parameters of the R-Fe and Fe-Fe exchange interactions are determined from the experimental data.

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Публикация на русском языке Магнитные свойства ферробората Nd0.95Dy0.05Fe3(BO3)4 с малым замещением в редкоземельной подсистеме. - [S. l. : s. n.]

Держатели документа:
Bryansk State Tech Univ, Bryansk 241035, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660038, Russia

Доп.точки доступа:
Begunov, A. I.; Demidov, A. A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович
}
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    Features of magnetic magnetoelectric and magnetoelastic properties of HoAl[[d]]3[[/d]](BO[[d]]3[[/d]])[[d]]4[[/d]] [Текст] / I. A. Begunov [и др.] // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P. 194 . - ISBN 978-5-7444-3124-2
   Перевод заглавия: Особенности магнитных, магнитоэлектрических и магнитоупругих свойств HoAl3(BO3)4
Аннотация: Проведено сравнение экспериментальных результатов и расчетов поведения свойств в рамках теории кристаллического поля. Показано близкое совпадение при температурах выше 5К. Предложено учитывать сверхтонкие взаимодействия при расчетах при более низких температурах.

Доп.точки доступа:
Begunov, I. A.; Бегунов, И. А.; Demidov, A. A.; Демидов А. А.; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Volkov, D. V.; Волков, Д. В.; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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Features of the magnetic and magnetoelectric properties of HoAl3(BO3)4 / A. I. Begunov [et al.] // JETP letters. - 2013. - Vol. 97, Is. 9. - P. 528-534DOI 10.1134/S002136401309004X
Аннотация: The main features of the magnetic and record magnetoelectric properties of a HoAl3(BO3)4 aluminoborate single crystal have been studied experimentally and theoretically. It has been found that the electric polarization that was previously detected in HoAl3(BO3)4 and is record for multiferroics is significantly larger, ΔP ba (B a ) ≈ −5240 μC/m2, with an increase in the magnetic field to 9 T at T = 5 K. The measured magnetic properties and revealed features have been interpreted within a united theoretical approach based on the molecular field approximation and on calculations in the crystal field model for a rare-earth ion. The experimental temperature (from 3 to 300 K) and field (up to 9 T) dependences of the magnetization have been described. The parameters of the crystal field of trigonal symmetry for a Ho3+ ion in HoAl3(BO3)4 have been determined from the interpretation of the experimental data.

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Публикация на русском языке Особенности магнитных и магнитоэлектрических свойств HoAl3(BO3)4. - [S. l. : s. n.]

Держатели документа:
Bryansk State Tech Univ, Bryansk 241035, Russia
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660038, Russia

Доп.точки доступа:
Begunov, A. I.; Demidov, A. A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович
}
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10.

Magnetic properties of the rare-earth ferroborate SmFe3(BO3)(4) / A. A. Demidov [et al.] // J. Exp. Theor. Phys. - 2013. - Vol. 116, Is. 5. - P. 800-805, DOI 10.1134/S1063776113050038. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research, project no. 12-02-31007mol_a. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary

Аннотация: The magnetic properties of trigonal antiferromagnet SmFe3(BO3)(4) are studied experimentally and theoretically. The measured characteristics are considered in terms of a theoretical approach based on the molecular field approximation and a crystal field model for a rare-earth ion. The temperature dependences of the initial magnetic susceptibility and the field and temperature dependences of magnetization in fields up to 5 T are described, and the anomaly in the magnetization curve for B aSyen c near 1 T, which points to a first-order phase transition, is analyzed.

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Публикация на русском языке Магнитные свойства редкоземельного ферробората SmFe3( BO3)4. - [S. l. : s. n.]

Держатели документа:
Bryansk State Tech Univ, Bryansk 241035, Russia
Moscow MV Lomonosov State Univ, Moscow 119992, Russia
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Demidov, A. A.; Volkov, D. V.; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Temerov, V. L.; Темеров, Владислав Леонидович
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