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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V., Gnatchenko S. L., Kachur I. S., Piryatinskaya V. G., Sukhachev A. L., Sokolov A. E., Strokova A. Ya., Kartashev A. V., Temerov V. L.
Заглавие : Spectroscopic manifestations of local crystal distortions in excited 4f states in crystals of huntite structure
Место публикации : Crystallogr. Rep. - 2013. - Vol. 58, Is. 1. - P.135–138. - DOI 10.1134/S1063774513010227
Аннотация: Optical absorption spectra of YbAl3(BO3)4, TmAl3(BO3)4 and TbFe3(BO3)4 trigonal crystals have been studied in temperature range 2–300 K. Temperature behavior of absorption lines parameters has shown, that during some f-f transitions the local environment of rare earth ions undergo distortions, which are absent in the ground state.Оптические спектры поглощения YbAl3(BO3)4, TmAl3(BO3)4 и TbFe3(BO3)4 треугольные кристаллы были изученны в диапазоне температуры 2–300 K. Температурное поведение параметров линий поглощения показало, что во время некоторых f–f переходов, окружение редких земных ионов подвергается искажениям, которые отсутствуют в обычном состоянии.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ikonnikov D. A., Malakhovskii A. V., Sukhachev A. L., Temerov V. L., Krylov A. S., Bovina A. F., Aleksandrovsky A. S.
Заглавие : Spectroscopic properties of HoAl3(BO3)4 single crystal
Коллективы : Ministry of Education and Science of the Russian Federation for Siberian Federal University; Russian Foundation for Basic Research Grants [12-02-00026, 14-02-00219, 13-02-00825]; Russian President Grant [SS-2886.2014.2]; SB RAS Project [43]
Место публикации : Opt. Mater.: Elsevier Science, 2014. - Vol. 37. - P.257–261. - ISSN 0925, DOI 10.1016/j.optmat.2014.05.036. - ISSN 18731252 (eISSN)
Примечания : Cited References: 30. - The work was supported by Grant of the Ministry of Education and Science of the Russian Federation for Siberian Federal University, the Russian Foundation for Basic Research Grants 12-02-00026, 14-02-00219 and 13-02-00825, by the Russian President Grant SS-2886.2014.2, and by SB RAS Project No. 43.
Предметные рубрики: RARE-EARTH IONS
OPTICAL-PROPERTIES
Ho3+ IONS
ABSORPTION
INTENSITIES
EMISSION
GLASSES
SPECTRA
LUMINESCENCE
PARAMETERS
Ключевые слова (''Своб.индексиров.''): absorption--luminescence--holmium--huntite--judd-ofelt
Аннотация: The Judd–Ofelt theory has been applied to analyze absorption spectra of Ho3+ ion in HoAl3(BO3)4 measured in spectral range 300–700 nm at room temperature. The Judd–Ofelt spectroscopic parameters have been determined as: Ω2 = 18.87 x 10 -20 cm2, Ω4 = 17.04 x 10 -20 cm2, Ω6 = 9.21 x 10 -20 cm2. These parameters have been used to calculate radiative lifetimes and branching ratios of the luminescence manifolds. Three luminescent bands were found in the spectral range 450–700 nm ascribed to transitions from the 5F5, (5F4, 5S2) and 3K8 states to the ground state 5I8. Experimental intensities of these luminescence transitions were compared with those calculated by using Judd–Ofelt theory and the system of kinetic equations for populations of starting luminescing states. Probabilities of radiativeless transitions were evaluated from this comparison.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V., Edelman I. S., Sokolov A. E., Temerov V. L., Gnatchenko S. L., Kachur I. S., Piryatinskaya V. G.
Заглавие : Optical absorption spectrum and local symmetry of Tm3+ ion in TmAl3(BO3)(4) crystal
Разночтения заглавия :авие SCOPUS: Optical absorption spectrum and local symmetry of Tm3+ ion in TmAl3(BO3)4 crystal
Место публикации : Phys. Lett. A: ELSEVIER SCIENCE BV, 2007. - Vol. 371, Is. 3. - P254-258. - ISSN 0375-9601, DOI 10.1016/j.physleta.2007.06.025
Примечания : Cited References: 10
Предметные рубрики: LASER
HUNTITE
Ключевые слова (''Своб.индексиров.''): rare earth compounds--spectroscopy--site symmetry--rare earth compounds--site symmetry--spectroscopy
Аннотация: With the help of group theory analysis of absorption spectra of the transition H-3(6) - F-3(3) of Tm3+ ion in TmAl3(BO3)(4) crystal, measured at several temperatures from 1.8 till 293 K, it has been shown, that the local symmetry of the Tm3+ environment is C-3 and it decreases to C-1 at a low temperature. Effective selection rules and polarizations of lines at high enough temperatures (when the line-width is larger than the splitting in C-3 symmetry) have been obtained. (c) 2007 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vorotynov A. M., Petrakovskii G. A., Shiyan Ya. G., Bezmaternykh L. N., Temerov V. E., Bovina A. F., Aleshkevych P.
Заглавие : Electron paramagnetic resonance of Mn2+ ions in single crystals of yttrium aluminum borate YAl3(BO3)4
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 3. - P463-466. - ISSN 1063-7834, DOI 10.1134/S1063783407030122
Примечания : Cited References: 11
Предметные рубрики: HUNTITE STRUCTURE
GROWTH
LASER
Аннотация: Single crystals of yttrium aluminum borate YAl3 (BO3)(4) doped with manganese ions are studied using electron paramagnetic resonance spectroscopy. It is shown that manganese ions introduced at low concentrations into the sample predominantly occupy yttrium ion sites in the crystal structure. The shape of the electron paramagnetic resonance spectrum unambiguously indicates that the valence of manganese ions in this case is equal to 2+. The parameters of the spin Hamiltonian of Mn2+, ions in the YAl3(BO3)(4) matrix are determined at room temperature. The magnitude and sign of the fine structure parameter D allow the conclusion that the YAl3(BO3)(4) single crystals doped with manganese ions have a strong crystal field at the yttrium ion sites and L easy-axis anisotropy.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V., Sokolov A. E., Sukhachev A. L., Temerov V. L., Stolbovaya N. A., Edelman I. S.
Заглавие : Magnetic circular dichroism and optical absorption in TmAl3(BO3)(4)
Разночтения заглавия :авие SCOPUS: Magnetic circular dichroism and optical absorption in TmAl 3(BO3)4
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 1. - P34-38. - ISSN 1063-7834, DOI 10.1134/S1063783407010076
Примечания : Cited References: 19
Предметные рубрики: SINGLE-CRYSTALS
SPECTROSCOPY
TRANSITIONS
HUNTITE
GROWTH
Аннотация: The polarized spectra of absorption and magnetic circular dichroism in a TmAl3(BO3)(4) single crystal are studied in the re-ion of H-3(6) - F-3(4), H-3(6) - F-3(3),and H-3(3) - F-3(2) electronic transitions in e Tm3+ ion. The structure of the spectra is interpreted qualitatively. It is shown that the magnetic circular dichroism of the H-3(6) - F-3(4) transition is determined by the contribution from the splitting of the ground state, whereas the magnetic circular dichroism of the H-3(6) - F-3(3) transition is governed by the contribution from the splitting of an excited state in a trigonal crystal field.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Krylov A. S., Gudim, I. A., Krylova S. N., Vtyurin A. N.
Заглавие : Study of phase transitions in ferroborate crystals with structure of huntite mineral
Коллективы : "GeoRaman", International conference, Российская академия наук, Сибирское отделение РАН, Институт геологии и минералогии им. В.С. Соболева Сибирского отделения РАН
Место публикации : XII Int. conf. "GeoRaman-2016": abstract volume/ compiled and edited by T.A. Alifirova, S.V. Rashchenko, A.V. Korsakov. - Novosibirsk: Офсет, 2016. - P.16. - ISBN 978-5-85957-124-6
Примечания : References: 3
Аннотация: Multiferroic materials showing the coexistence of at least two ferroic orders ((anti)ferroelectric, (anti)ferromagnetic and (anti)ferroelasticity) are expected to find potential applications in many devices. Amongst these properties the coexistence of ferroelectricity and ferromagnetism is highly desired. Besides their coexistence, of utmost importance is a strong coupling between the two ferroic orders. In multiferroic materials, the coupling interaction between the different order parameters can produce additional functionalities. The application of multiferroics will make possible to significantly enlarge the functional possibilities of spintronics. Crystals of the RFe3(BO3)4 family (R is rare earth ion) with huntite mineral structure were reported to possess multiferroic features, demonstrating both structural and magnetic phase transitions [1 –4], where transition points may be varied by rare earth composition. In this work we used Raman spectroscopy to study Ho1–xNdxFe3(BO3)4 (x = 0, 0.25, 0.5, 0.75) single crystals. Raman measurements on HoFe3(BO3) crystal were carried out at pressures up to 7 GPa and at temperatures up to 680 K by using a diamond anvil cell in order to determine the pressure–temperature phase diagram. From the changes in the Raman spectrum at the phase transition, the stability regions of phases I, II were investigated (Figure 1). After reaching 675 K and 2.5 GPa Raman spectra lines disappear and formation of a new crystalline form was discovered. This form persists ambient condition after removing high pressure and temperature.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gudim, I. A., Eremin E. V., Temerov V. L., Volkov N. V.
Заглавие : The magnetoelectric polarization of Ho0,5Nd0,5Fe3(BO3)4 crystal
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.P11.7. - P.539. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3. - This study was supported by the Russian Foundation for Basic Research, project no. 13-02-12442 and no. 14-02-00307
Ключевые слова (''Своб.индексиров.''): huntite--magnetoelectric polarization--twinning
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Krylov A. S., Moshkina E. M., Sofronova S. N., Gudim I. A., Temerov V. L., Vtyurin A. N.
Заглавие : Investigation of structural and magnetic phase transitions in multiferroic rare-earth tetraborate crystals with huntite structure by Raman spectroscopy
Коллективы : Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, International Workshop on Relaxor Ferroelectrics
Место публикации : Joint 13th Russia/CIS/Baltic/Japan Symp. on Ferroelectricity and Int. Workshop on Relaxor Ferroelectrics (RCBJSF-IWRF 2016): book of abstracts. - 2016. - Ст.Oral-15
Примечания : References: 4
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Eremin E. V., Volkov A., Gudim I. A., Temerov V. L.
Заглавие : Magnetic and magnetoelectric properties of the HoFe3-xGax(BO3)4
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. - P.184. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3. - This study was supported by the Russian Foundation for Basic Research, project no. 13-02-12442 and no. 14-02-00307
Ключевые слова (''Своб.индексиров.''): huntite--magnetoelectric polarization--twinning
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov A. S., Moshkina E. M., Sofronova S. N., Gudim, I. A., Temerov V. L., Vtyurin A. N.
Заглавие : Low-temperature features of Raman spectra below magnetic transitions in multiferroic Ho1–xNdxFe3(BO3)4 and Sm1–yLayFe3(BO3)4 single crystals
Место публикации : Ferroelectrics: Taylor & Francis, 2017. - Vol. 509, Is. 1. - P.92-96. - ISSN 00150193 (ISSN), DOI 10.1080/00150193.2017.1294040
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): raman spectra--magnetic ordering--huntite--rare-earth ferroborates
Аннотация: Raman spectra changes in multiferroic Ho1–xNdxFe3(BO3)4 (x = 0, 0.25, 0.5, 0.75) and Sm1–yLayFe3(BO3)4 (y = 0, 0.75) single crystals at low temperatures have been analyzed. The anomalies corresponding to the phase transition of the second order have been detected at the temperatures of magnetic phase transitions, being consistent with previously reported results of the magnetization study. A number of anomalies in the temperature dependences of the spectral lines associated with the occurrence of magnetic order. A mode corresponding to two-magnon scattering was revealed. Comparison of the features of low-temperature low-frequency spectra of solid solutions Ho-Nd and Sm-La has been carried out.
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