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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V., Sokolov V. V., Gudim I. A.
Заглавие : Influence of the low local symmetry of Er3+ ions on magnetic circular dichroism and absorption spectra of f-f transitions in ErFe3(BO3)4 single crystal
Место публикации : J. Magn. Magn. Mater. - 2018. - Vol. 465. - P.700-708. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2018.06.057
Примечания : Cited References: 29. - The work was supported by the Russian Foundation for Basic Researches grant 16-02-00273 and by the Project of Russian Academy of Science No. 0356-2017-0030.
Ключевые слова (''Своб.индексиров.''): er3+ ion--f-f transitions--magnetic circular dichroism--rare earth ferroborates
Аннотация: Linearly polarized absorption spectra and magnetic circular dichroism (MCD) spectra of ErFe3(BO3)4 single crystal were measured in the range of 9000–23000 cm−1 at 90 K. The absorption spectra of f-f transitions were decomposed into the Lorentz shape components and intensities of the components were found. MCD spectra permitted us to measure the Zeeman splitting of some transitions and so to determine changes of the Landé factor along the C3 axis of the crystal during these transitions. Optical and magneto-optical properties of f-f transitions in the ErFe3(BO3)4 crystal were compared with those in the ErAl3(BO3)4 crystal. Substantial difference of the properties connected with the difference of the Er3+ ions local symmetry in two crystals was revealed. Large splitting of one of the f-f transitions without magnetic field, which is not possible for the Kramers doublets, was observed. It was explained by appearance of two absorbing centers due to the local decrease of symmetry in the excited state. Appreciable difference of the local vibrations energy in some excited states was revealed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sukhachev A. L., Malakhovskii A. V., Aleksandrovsky A. S., Gudim I. A., Temerov V. L.
Заглавие : Spectroscopic properties of HoFe3(BO3)4, NdFe3(BO3)4 and Ho0.75Nd0.25Fe3(BO3)4 single crystals
Место публикации : Opt. Mater. - 2018. - Vol. 83. - P.87-92. - ISSN 09253467 (ISSN), DOI 10.1016/j.optmat.2018.05.078
Примечания : Cited References: 39. - A.L. Sukhachev thanks for support Project of Russian Academy of Science No. 0356-2017-0030. A.V. Malakhovskii thanks Russian Foundation for Basic Researches (RFBR) Grant No. 16-02-00273. A.S. Aleksandrovsky thanks RFBR Grant No. 17-52-53031. I.A. Gudim and V.L. Temerov thank RFBR Grant No. 17-52-45091.
Ключевые слова (''Своб.индексиров.''): holmium and neodymium ferroborates--judd–ofelt parameters
Аннотация: Polarized absorption spectra of ferroborates HoFe3(BO3)4, NdFe3(BO3)4 and Ho0.75Nd0.25Fe3(BO3)4 were measured at room temperature in spectral range 4000–24500 cm−1 (400–2500 nm). The studied single crystals were grown from solution-melts. Intensities of the f-f transitions were measured and the Judd–Ofelt parameters Ωλ of Ho3+ and Nd3+ ions in the studied crystals were calculated. It was revealed that the crystals content not strongly influences the Judd–Ofelt parameters. The Ω2 parameter for Ho3+ ion is the most sensitive to the crystal content. Linear dichroism of the hypersensitive transitions appeared to be the largest one for both rare earth ions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov A. S., Gudim, I. A., Nemtsev I. V., Krylova S. N., Shabanov A. V., Krylov A. A.
Заглавие : Raman study of HoFe3(BO3)4 at simultaneously high pressure and high temperature: p–T phase diagram
Коллективы : International GeoRAMAN Conference
Место публикации : J. Raman Spectrosc. - 2017. - Vol. 48, Is. 11. - P.1406-1410. - ISSN 0377-0486, DOI 10.1002/jrs.5078. - ISSN 1097-4555(eISSN)
Примечания : Cited References:35. - Authors are grateful to Prof. A.N. Vtyurin for his valuable discussion. This work was supported by the Russian Foundation for Basic Research (grant no. 17-02-00694)
Предметные рубрики: HYDRATE FORMATION
SINGLE-CRYSTALS
WATER SYSTEM
TRANSITIONS
Ключевые слова (''Своб.индексиров.''): phase transitions--high hydrostatic pressure--ferroborates--p-t phase--diagram--nanocrystal
Аннотация: Raman spectra of a HoFe3(BO3)4 crystal chip has been investigated at simultaneously high temperature and high pressure (up to 7.1 GPa and 560 K). On the basis of Raman analysis, the assignment to one of the two possible crystal phases has been made. The experimental p–T phase diagram of HoFe3(BO3)4 was established. An increase in the pressure leads to an increase in the temperature of transition. The phase boundary equation was obtained. Neither triple points nor a phase with new symmetry was revealed in the phase diagram. A critical point with the temperature T = 560 K and the pressure p = 2.53 GPa was found. The nanocrystals with different shapes began to grow on crystal surface after reaching that point. The composition of new nanocrystals is identical to the composition of initial crystal.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moshkina E. M., Gudim I. A., Temerov V. L., Krylov A. S.
Заглавие : Temperature-dependent absorption lines observation in Raman spectra of SmFe3 (BO3)4 ferroborate
Коллективы : RFBR [18-02-00696, 18-02-00754]
Место публикации : J. Raman Spectrosc. - 2018. - Vol. 49, Is. 10. - P.1732-1735. - ISSN 0377-0486, DOI 10.1002/jrs.5430. - ISSN 1097-4555(eISSN)
Примечания : Cited References: 12. - RFBR, Grant/Award Numbers: 18-02-00696 and 18-02-00754
Предметные рубрики: SmFe3 (BO3)4
Ho1-xNdxFe3(BO3)4
CRYSTALS
Ключевые слова (''Своб.индексиров.''): absorption--ferroborates--huntite--level splitting--magnetic phase--transitions
Аннотация: The paper demonstrates possibilities of observation and thermal dependency study of the absorption lines as a co‐product of Raman spectroscopy study in SmFe3 (BO3)4 ferroborate. Raman spectra of the ferroborate were studied in a wide temperature range (T = 10÷300 K). Temperature‐dependent absorption lines sensitive to the magnetic phase transition have been observed in Raman spectra at two spectral ranges.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gudim I. A., Titova, Veronika
Заглавие : Growth of single crystals of trigonal ferroborates (Ho1- xNdx)Fe3(BO3)4 with the huntite structure depending on the crystallochemical growth conditions
Коллективы : Байкальская международная конференция "Магнитные материалы. Новые технологии", "Магнитные материалы. Новые технологии", Байкальская международная конференция, "Magnetic materials. New tecnologies", Baikal International Conference, Иркутский государственный университет
Место публикации : Магнитные материалы. Новые технологии: тез. докл. VIII Байкал. междунар. конф. BICMM-2018/ чл. прогр. ком. R. S. Iskhakov [et al.]. - Иркутск, 2018. - P.189. - ISBN 978-5-00133-051-6
Примечания : Библиогр.: 2
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Bilych I. V., Zhekov K. R., Gaydamak T. N., Burma N. G., Kolodyazhnaya M. P., Zvyagina G. A., Fil' V. D., Gudim, I. A.
Заглавие : Magnetopiezoelectric effects in easy plane ferroborates
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.4PO-J-46. - P.925 (Шифр 29916280)
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A. I., Demidov A. A., Tugarinov V. I., Gudim, I. A., Temerov V. L.
Заглавие : Magnetic resonance in PrxY1–xFe3(BO3)4 single crystals with inclined magnetic structure
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.O5.7. - P.255. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 4
Ключевые слова (''Своб.индексиров.''): magnetism--magnetic resonance--ferroborates
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mikhin A. A., Kuzmenko A. M., Ivanov V. Yu., Shuvaev A., Dziom V., Pimenov A., Bezmaternykh L. N., Gudim, I. A.
Заглавие : Magnetoelectric phenomena with electromagnons in rare-earth borate
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.I5.3. - P.244. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 5
Ключевые слова (''Своб.индексиров.''): multiferroics--electromagnon--antiferromagnetic resonance--rare-earth ferroborates
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov Y. F., Kadomtseva A. M., Vorob'ev G. P., Mukhin A. A., Ivanov V. Y., Kuz'menko A. M., Prokhorov A. S., Bezmaternykh L. N., Temerov V. L.
Заглавие : Observation of spontaneous spin reorientation in Nd1-x Dy (x) Fe-3(BO3)(4) ferroborates with a competitive R-Fe exchange
Коллективы : Russian Foundation for Basic Research [07-02-00580-a]
Разночтения заглавия :авие SCOPUS: Observation of spontaneous spin reorientation in Nd1 - X Dy x Fe3(BO3)4 ferroborates with a competitive R-Fe exchange
Место публикации : JETP Letters. - 2009. - Vol. 89, Is. 7. - P.345-351. - ISSN 0021-3640, DOI 10.1134/S002136400907008X
Примечания : Cited References: 14. - We are deeply grateful to A. K. Zvezdin and A. P. Pyatakov for useful advice and to E. A. Popova for placing the DyFeINF3/INF(BOINF3 /INF)INF4INF single crystal at our disposal. This work was supported by the Russian Foundation for Basic Research ( project no. 07-02-00580-a).
Предметные рубрики: TRIGONAL GDFE3(BO3)(4)
MAGNETIC-PROPERTIES
DYFE3(BO3)(4)
Аннотация: The magnetic, magnetoelectric, and magnetoelastic properties of DyFe3(BO3)(4) single crystals and the Nd0.75Dy0.25Fe3(BO3)(4) substituted compound with the competitive Nd-Fe and Dy-Fe exchange interactions have been investigated in magnetic fields up to 210 kOe. It has been shown that the antiferromagnetic state in Nd0.75Dy0.25Fe3(BO3)(4) below the N,el temperature is easy-plane and a spontaneous spin-reorientation transition to a uniaxial state occurs near 25 K. Anomalies are observed in various physical characteristics in a spin-flop transition induced by the magnetic field along the trigonal axis. The H-T phase diagrams are constructed; they are in good agreement with a simple model taking into account the anisotropy of the exchange splitting and g factors of the ground doublets of the Dy3+ and Nd3+ ions. The features of the magnetoelectric effect in various magnetic phases have been studied. Spontaneous electric polarization has been revealed in the region of the existence of an easy-plane antiferromagnetic state in the substituted compound. A qualitative theoretical justification of the possibility of the appearance of the spontaneous spin-reorientation transition in the Nd0.75Dy0.25Fe3(BO3)(4) substituted compound is given.
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