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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova E. A., Volkov D. V., Vasiliev A. N., Demidov A. A., Kolmakova N. P., Gudim I. A., Bezmaternykh L. N., Tristan N., Skourski Y., Buchner B., Hess C., Klingeler R.
Заглавие : Magnetization and specific heat of TbFe3(BO3)(4): Experiment and crystal-field calculations
Разночтения заглавия :авие SCOPUS: Magnetization and specific heat of Tb Fe3 (B O3) 4: Experiment and crystal-field calculations
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2007. - Vol. 75, Is. 22. - Ст.224413. - ISSN 1098-0121, DOI 10.1103/PhysRevB.75.224413
Примечания : Cited References: 22
Предметные 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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Demidov A. A., Gudim I. A., Eremin E. V.
Заглавие : Magnetic properties of Nd0.6Dy0.4Fe3(B03)4
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2011): Book of abstracts. - 2011. - Ст.23PO-K-7. - P.477-478
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic properties of Nd 0.6Dy 0.4Fe 3(BO 3) 4
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P.261-264. - ISBN 9783037854365, DOI 10.4028/www.scientific.net/SSP.190.261
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic Properties of Sm0.7Ho0.3Fe3(BO3)4
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 115, Is. 5. - P.815-828. - ISSN 1063-7761, DOI 10.1134/S1063776112100020
Примечания : Cited References: 31
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic phase transitions in Nd1−xDyxFe3(BO3)4 ferroborates
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 114, Is. 2. - P.259-272. - ISSN 1063-7761, DOI 10.1134/S1063776111160023
Примечания : Cited References: 29. - This study was supported financially by the President of the Russian Federation (grant no. MK-497.2010.2).
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic properties of Nd0.9Dy0.1Fe3(BO3)4
Место публикации : Physica B: Elsevier Science BV, 2012. - Vol. 407, Is. 3. - P.393-397. - ISSN 0921-4526, DOI 10.1016/j.physb.2011.11.004
Примечания : Cited References: 18. - This study was supported, in part, by Russian Federation's President Grant MK-497.2010.2 (A.A.D.).
Предметные рубрики: NDFE3(BO3)4
HOFE3(BO3)4
MULTIFERROICS
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunov A. I., Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic properties of the Nd0.95Dy0.05Fe 3(BO3)4 ferroborate with small substitution in the rare-earth element subsystem
Место публикации : J. Exp. Theor. Phys. - 2013. - Vol. 117, Is. 5. - P.862-874. - ISSN 1063-7761, DOI 10.1134/S1063776113120108
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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Begunov I. A., Demidov A. A., Gudim, I. A., Eremin E. V., Volkov D. V.
Заглавие : Features of magnetic magnetoelectric and magnetoelastic properties of HoAl[[d]]3[[/d]](BO[[d]]3[[/d]])[[d]]4[[/d]]
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - P.194. - ISBN 978-5-7444-3124-2
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.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunov A. I., Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Features of the magnetic and magnetoelectric properties of HoAl3(BO3)4
Место публикации : JETP letters. - 2013. - Vol. 97, Is. 9. - P.528-534. - DOI 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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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Volkov D. V., Gudim, I. A., Eremin E. V., Temerov V. L.
Заглавие : Magnetic properties of the rare-earth ferroborate SmFe3(BO3)(4)
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2013. - Vol. 116, Is. 5. - P.800-805. - ISSN 1063-7761, DOI 10.1134/S1063776113050038
Примечания : Cited References: 22. - This work was supported by the Russian Foundation for Basic Research, project no. 12-02-31007mol_a.
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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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Volkov D. V., Gudim I. A., Eremin E. V., Boldyrev K. N.
Заглавие : Magnetic, magnetoelastic, and spectroscopic properties of TmAl3(BO3)4
Коллективы : Russian Foundation for Basic Research [13-02-12442ofi_m2]; Russian Federation [MK-1700.2013.2]
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 119, Is. 4. - P.737-744. - ISSN 1063-7761, DOI 10.1134/S106377611410015X. - ISSN 1090-6509
Примечания : Cited References: 28. - This study was supported financially by the Russian Foundation for Basic Research (project no. 13-02-12442ofi_m2) and (K.N.B.) by the grant no. MK-1700.2013.2 from the President of the Russian Federation.
Предметные рубрики: THERMAL-EXPANSION
CRYSTALS
MAGNETOSTRICTION
HoAl3(BO3)4
GARNETS
Аннотация: The thermodynamic properties of alumoborate TmAl3(BO3)4 single crystal are studied experimentally and theoretically. A theoretical analysis based on the crystal field model makes it possible to interpret all measured parameters. The crystal field parameters are determined. The temperature (3–300 K) and field (up to 9 T) dependences of magnetization are described. The field and temperature dependences of multipole moments of the Tm3+ ion in TmAl3(BO3)4 make it possible to describe magnetostriction and low-temperature anomalies in thermal expansion.
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Begunov A. I., Demidov A. A., Volkov D. V., Gudim, I. A., Eremin E. V., Boldyrev K. N.
Заглавие : Magnetic and magnetoelastic properties of TmAl3(BO3)4
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова
Место публикации : Moscow int. Symp. on Magnet. (MISM-2014): Book of abstracts. - 2014. - Ст.30PO-M-18. - P.275. - ISBN 978-5-91978-025-0
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Gudim, I. A., Eremin E. V., Begunov A. I., Demidov A. A., Boldyrev K. N.
Заглавие : Magnetization, magnetoelectric polarization, and specific heat of HoGa3(BO3)4
Коллективы : 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]
Место публикации : JETP Letters. - 2014. - Vol. 99, Is. 2. - P.67-75. - ISSN 0021-3640, DOI 10.1134/S0021364014020106. - ISSN 1090-6487
Примечания : 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).
Предметные 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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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A. I., Demidov A. A., Velikanov D. A., Tugarinov V. I., Temerov V. L.
Заглавие : Magnetic properties of PrxY1-xFe3(BO3)4
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2014): Book of abstracts. - 2014. - P.192. - ISBN 978-5-91978-025-0
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunov A. I., Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Features of magnetic, magnetoelectric and magnetoelastic properties of HoAl3(BO3)4
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: S. G. Ovchinnikov, A. Samardak: Trans Tech Publications, 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P.352-357. - ISSN 978-303835054-5, DOI 10.4028/www.scientific.net/SSP.215.352. - ISSN 1662-9779
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): magnetoelectric polarization--magnetostriction--multiferroics
Аннотация: The main features of the magnetic, magnetoelastic and record magnetoelectric properties of a HoAl3(BO3)4 alumoborate single crystal have been studied experimentally and theoretically. For magnetic field B||a we have observed a giant polarization ΔPba(Ba) ≈ -5240 μC/m2 induced by field of 9 T at T = 5 K. We have calculated the magnetic characteristics of HoAl3(BO3)4 in the framework of a crystal-field model. The parameters of the crystal-field in HoAl3(BO3)4 have been determined. Good agreement of experimental and calculated magnetization curves Mc,˄c(B) and temperature dependences of magnetization Mc,˄c(T) was achieved. The field and temperature dependences of the multipole moments have been calculated for interpretation of magnetostriction in HoAl3(BO3)4. © (2014) Trans Tech Publications, Switzerland.Экспериментально и теоретически исследованы основные особенности магнитных и рекордных магнитоэлектрических свойств монокристалла алюмобората HoAl3(BO3)4. Обнаружена гигантская электрическая поляризация DPba(Ba) — –5240 мкКл/м2, индуцированная магнитным полем 9 Тл при Т = 5 К. Измеренные магнитные свойства и обнаруженные особенности проинтерпретированы в рамках единого теоретического подхода, который базируется на приближении молекулярного поля и расчетах в модели кристаллического поля для редкоземельного иона. Описаны экспериментальные температурные от 3 до 300 К и полевые до 9 Тл зависимости намагниченности. При интерпретации экспериментальных данных определены параметры кристаллического поля тригональной симметрии для иона Ho3+ в HoAl3(BO3)4.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Demidov A. A., Velikanov D. A., Tugarinov V. I., Temerov V. L.
Заглавие : Magnetic properties of PrхY1-xFe3(BO3)4
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: N. Perov, A. Semisalova: Trans Tech Publications Ltd, 2015. - Vol. 233-234: Achievements in Magnetism. - P.360-363. - ISSN 1662-9779, DOI 10.4028/www.scientific.net/SSP.233-234.360. - ISSN 978-3-03835-482-6
Примечания : Cited References: 34
Предметные рубрики: Achievements in magnetism
Ключевые слова (''Своб.индексиров.''): rare-earth ferroborates rfe3(bo3)4--phase transitions--multiferroics
Аннотация: The magnetic properties of trigonal PrxY1-xFe3(BO3)4 compound have been investigated. Anomalies on the magnetization curves induced by a magnetic field are observed for each composition. 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 PrxY1-xFe3(BO3)4 have been interpreted and good agreement between theory and experiment has been achieved.Магнитные свойства тригональных соединений PrxY1-xFe3(BO3)4 были исследованы. Для каждого cостава наблюдаются аномалии на кривых намагничивания, индуцированных магнитным полем. Расчеты проводились с использованием приближений молекулярного поля и модели кристаллического поля для редкоземельной подсистемы. Обширные экспериментальные данные о магнитных свойствах PrxY1-xFe3(BO3)4 были интерпретированы и было достигнуто хорошее согласие между теорией и экспериментом.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ritter C., Pankrats A. I., Demidov A. A., Velikanov D. A., Temerov V. L., Gudim, I. A.
Заглавие : Inclined magnetic structure of iron borate PrxY1-xFe3(BO3)4: A neutron diffraction study and crystal-field calculations
Коллективы : Russian Foundation for Basic Research [13-02-12442 ofi_m2]
Место публикации : Phys. Rev. B: American Physical Society, 2015. - Vol. 91, Is. 13. - Ст.134416. - ISSN 1098, DOI 10.1103/PhysRevB.91.134416. - ISSN 1550235X(eISSN)
Примечания : Cited References:33. - This paper was supported by the Russian Foundation for Basic Research (Project No. 13-02-12442 ofi_m2).
Предметные рубрики: GdFe3(BO3)4
Аннотация: The magnetic structure of the mixed rare-earth system PrxY1−xFe3(BO3)4 has been studied by elastic neutron powder diffraction and magnetic measurements. A spin reorientation from easy axis to easy plane occurs in the concentration range x=0.67–0.45 through the formation of inclined magnetic structures. The inclination of the Fe moments from the basal plane depends on the Pr content and ranges from 67(2)° for x=0.67 to 16(4)∘ for x=0.45 at T=3K. A nonmonotonic change of the inclination angle with temperature is found for all compounds but there is no sign of a spontaneous spin reorientation in the temperature range of magnetic order.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Gudim, I. A., Demidov A. A., Eremin E. V.
Заглавие : Magnetoelectric and magnetic properties of aluminum borates Ho1 − x Nd x Al3(BO3)4
Коллективы : Russian Foundation for Basic Research [13-02-12442 ofi_m2]
Место публикации : JETP Letters. - 2015. - Vol. 101, Is. 5. - P.318-324. - ISSN 0021, DOI 10.1134/S002136401505015X. - ISSN 10906487(eISSN)
Примечания : Cited References:26. - This work was supported by the Russian Foundation for Basic Research (project no. 13-02-12442 ofi_m2).
Предметные рубрики: HoAl3(BO3)4
Аннотация: The magnetoelectric and magnetic properties of substituted aluminum borates Ho1 − x Nd x Al3(BO3)4 have been studied experimentally and theoretically. A large magnetoelectric effect exceeding all known values in isostructural compounds except for HoAl3(BO3)4 has been found. The magnetoelectric polarization of Ho0.8Nd0.2Al3(BO3)4 and Ho0.5Nd0.5Al3(BO3)4 at T = 5 K in a field of 9 T is ΔP ab (B b ) ≈ −2630 and 1380 μC/m2, respectively. A theoretical consideration based on the crystal field model for the rare-earth ion made it possible to interpret all measured properties within the unified approach. The crystal field parameters have been determined. The temperature (3–300 K) and field (up to 9 T) dependences of the magnetization and the temperature (5–100 K) and field (up to 9 T) dependences of the polarization have been described. The studied properties of Ho1 − x Nd x Al3(BO3)4 have been compared with those of HoAl3(BO3)4 demonstrating record-high polarization values.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Demidov A. A., Ritter C., Velikanov D. A., Semenov S. V., Tugarinov V. I., Temerov V. L., Gudim, I. A.
Заглавие : Transformation from an easy-plane to an easy-axis antiferromagnetic structure in the mixed rare-earth ferroborates PrxY1-xFe3(BO3)4: Magnetic properties and crystal field calculations
Место публикации : J. Phys.: Condens. Matter: IOP Publishing, 2016. - Vol. 28, Is. 39. - Ст.396001. - ISSN 09538984 (ISSN), DOI 10.1088/0953-8984/28/39/396001
Примечания : Cited References: 27. - This work was supported by the Russian Foundation for Basic Research (project no. 15-42-04186_r_sibir'_a).
Ключевые слова (''Своб.индексиров.''): magnetic phase transitions--rare-earth ferroborates rfe3(bo3)4--antiferromagnetic resonance
Аннотация: The magnetic structure of the mixed rare-earth system PrxY1-xFe3(BO3)4 (x = 0.75, 0.67, 0.55, 0.45, 0.25) was studied via magnetic and resonance measurements. These data evidence the successive spin reorientation from the easy-axis antiferromagnetic structure formed in PrFe3(BO3)4 to the easy-plane one of YFe3(BO3)4 associated with the weakening of the magnetic anisotropy of the Pr subsystem due to its diamagnetic dilution by nonmagnetic Y. This reorientation occurs through the formation of an inclined magnetic structure, as was confirmed by our previous neutron research in the range of x = 0.67 ? 0.45. In the compounds with x = 0.75 and 0.67 whose magnetic structure is close to the easy-axis one, a two-step spin reorientation takes place in the magnetic field H||c. Such a peculiarity is explained by the formation of an interjacent inclined magnetic structure with magnetic moments of Fe ions located closer to the basal plane than in the initial state, with these intermediate states remaining stable in some ranges of the magnetic field. An approach based on a crystal field model for the Pr3+ ion and the molecular-field approximation is used to describe the magnetic characteristics of the system PrxY1-xFe3(BO3)4. With the parameters of the d-d and f-d exchange interactions, of the magnetic anisotropy of the iron subsystem and of the crystal field parameters of praseodymium thus determined, it is possible to achieve a good agreement between the experimental and calculated temperature and field dependences of the magnetization curves (up to 90 kOe) and magnetic susceptibilities (2-300 K). © 2016 IOP Publishing Ltd.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A. I., Ritter C., Demidov A. A., Velikanov D. A., Semenov S. V., Tugarinov V. I., Temerov V. L., Gudim I. A.
Заглавие : Inclined magnetic structures in the mixed PrxY1–xFe3(BO3)4: neutron and magnetic studies and molecular-field approximation
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.I1.10. - P.27. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3
Ключевые слова (''Своб.индексиров.''): inclined magnetic structure--magnetic anisotropy--crystal field parameters
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