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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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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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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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    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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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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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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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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Magnetization, magnetoelectric polarization, and specific heat of HoGa3(BO3)4 / N. V. Volkov [et al.] // JETP Letters. - 2014. - Vol. 99, Is. 2. - P. 67-75, DOI 10.1134/S0021364014020106. - Cited References: 28. - This work was supported by the Russian Foundation for Basic Research (project no. 13-02-12442-ofi_m2). K.N.B. also acknowledges the support from the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. MK-1700.2013.2). . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
HoAl3(BO3)4
Аннотация: A comprehensive experimental and theoretical study of magnetic, magnetoelectric, thermal, and spectroscopic characteristics of HoGa3(BO3)4 gallium borate single crystals has been performed. A large magnetoelectric effect exceeding its values found in all iron and aluminum borates except HoAl3(BO3)4 has been observed. The magnetoelectric polarization of HoGa3(BO3)4 equals ΔP ba (B a ) ≈ −1020 μC/m2 at T = 5 K in a magnetic field of 9 T. The theoretical treatment based on the crystal field model for rare-earth ions provides a unified approach for the consistent interpretation of all measured characteristics. The crystal-field parameters are determined. The temperature (in the 3–300 K range) and magnetic field (up to 9 T) dependences of the magnetization, the Schottky anomaly in the temperature dependence of the specific heat, and its shift in the field B || c are described. To compare the thermal properties of HoGa3(BO3)4 with those of HoAl3(BO3)4 exhibiting record values of the polarization, the specific heat of HoAl3(BO3)4 at various B values and the temperature dependence of the polarization ΔP b (T) in the applied magnetic field of 9 T have been measured.

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Публикация на русском языке Намагниченность, магнитоэлектрическая поляризация и теплоемкость HoGa3(BO3)4 [Текст] / Н. В. Волков [и др.] // Письма в Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 99 Вып. 1-2. - С. 72-80

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Bryansk State Tech Univ, Bryansk 241035, Russia
Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia

Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Begunov, A. I.; Demidov, A. A.; Boldyrev, K. N.; Russian Foundation for Basic Research [13-02-12442-ofi_m2]; Council of the Russian Federation for Support of Young Scientists and Leading Scientific Schools [MK-1700.2013.2]
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Magnetic properties of PrxY1-xFe3(BO3)4 / A. I. Pankrats [и др.] // Moscow Int. Symp. on Magnet. (MISM-2014) : Book of abstracts. - 2014. - P. 192 . - ISBN 978-5-91978-025-0

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Доп.точки доступа:
Pankrats, A. I.; Панкрац, Анатолий Иванович; Demidov, A. A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Tugarinov, V. I.; Тугаринов, Василий Иванович; Temerov, V. L.; Темеров, Владислав Леонидович; Moscow International Symposium on Magnetism(6 ; 2014 ; 29 June-3 July ; Moscow); Московский государственный университет им. М.В. Ломоносова
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