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1.
Raman scattering under
structural and magnetic phase transitions in terbium ferroborate / A. V.
Peschanskii
[et al.]> // Low Temp. Phys. - 2014. -
Vol. 40
,
Is. 2
. - P. 171-178,
DOI
10.1063/1.4865566. - Cited References: 24 . - ISSN 1063-777X. - ISSN 1090-6517
РУБ
Physics, Applied
Рубрики:
SPIN-PHONON INTERACTION
GDFE3(BO3)4
Аннотация:
The Raman scattering spectrum of single crystal TbFe3(BO3)4 was studied in the frequency range 3–500 cm−1 at temperatures from 2 to 300 K. It was found that in high- and low-temperature phases there exist additional phonon lines which were not known before. In the high-temperature phase, these lines originate from LO–TO splitting of polar phonons. Appearance of the additional lines in the low temperature phase is due to both a reduction of the crystal symmetry under the phase transition and an increase of the primitive cell volume. It was established that the frequencies of some phonon lines in the magneto-ordered phase are shifted towards the high-energy region upon applying an external magnetic field along the third-order axis. The spectrum of two-magnon Raman scattering was investigated. It was shown that at low temperatures the two-magnon band has a complex shape that reflects specific features in the density of state of the magnon branches. The magnon energy at the Brillouin zone boundary was determined.
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Публикация на русском языке
Рамановское рассеяние света при структурном и магнитном фазовых переходах в ферроборате тербия [Текст] / А. В. Песчанский [и др.] // Физ. низких температур : Физико-технический институт низких температур им. Б.И. Веркина НАН Украины, 2014. - Т. 40 Вып. 2. - С. 219-229
Держатели документа:
Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Peschanskii
, A. V.; Yeremenko, A. V.; Fomin, V. I.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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2.
Peschanskii
, A. V.
Raman scattering in multiferroic SmFe3(BO3)4 / A. V.
Peschanskii
, V. I. Fomin, I. A. Gudim> // Low Temp. Phys. - 2016. -
Vol. 42
,
Is. 6
. - P. 475-483,
DOI
10.1063/1.4954783. - Cited References:21 . - ISSN 1063-777X. - ISSN 1090-6517
РУБ
Physics, Applied
Рубрики:
SINGLE-CRYSTALS
MAGNETOELASTIC PROPERTIES
PHASE-TRANSITIONS
FERROBORATE
PHONONS
Аннотация:
Raman spectrum of single-crystal SmFe3(BO3)4 was studied in the frequency range from 3 to 1500 cm−1 at temperatures 10–300 K. All the A 1 and E phonon modes predicted by the group theory for a given symmetry of the crystal were observed. The magnitudes of splitting between the LO and TO components of polar E phonons were determined. It was found that under the transition to a magnetically ordered phase, the behavior of the intensity of the line corresponding to the A 1 vibrational mode is anomalous. It was shown that at low temperatures the spectrum of two-magnon excitations has a complex shape and is observed with both nondiagonal and diagonal components of the scattering tensor. This complex shape reflects the features in the density of states of the magnetic branches. An estimate of the magnon energy Em at the Brillouin zone boundary gave ∼47 cm−1. The structure of the ground multiplet 6 H 5/2 of a Sm+3 ion in paramagnetic and antiferromagnetic states as well as the effect of the magnetic phase transition on it were studied. Electron-phonon interaction for the electronic excitation at 225 cm−1 was revealed.
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Публикация на русском языке
Песчанский А. В. Рамановское рассеяние света в мультиферроике SmFe3(BO3)4 [Текст] / А. В. Песчанский, В. И. Фомин, И. А. Гудим // Физ. низких температур. - Харьков : Физико-технический институт низких температур им. Б.И. Веркина Национальной академии наук Украины, 2016. - Т. 42 Вып. 6. - С. 607-618
Держатели документа:
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, 47 Nauki Ave, UA-61103 Kharkov, Ukraine.
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Fomin, V. I.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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3.
Peschanskii
, A. V.
Spectroscopic study of the TbAl3(BO3)4 single crystal: Raman and luminescence spectroscopy / A. V.
Peschanskii
, A. Y. Glamazda, I. A. Gudim> // Low Temp. Phys. - 2020. -
Vol. 46
,
Is. 12
. - P. 1223-1230,
DOI
10.1063/10.0002478. - Cited References: 20 . - ISSN 1063-777X. - ISSN 1090-6517
РУБ
Physics, Applied
Рубрики:
SCATTERING
GENERATION
ND
Кл.слова (ненормированные):
TbAl3(BO3)4
--
vibrational spectrum
--
electronic transitions
--
Raman spectroscopy
--
luminescence
Аннотация:
The vibrational and luminescence properties of the TbAl3(BO3)4 single crystal were studied in the temperature range of 5–300 K. Raman spectra of the single crystal revealed 5 of 7 A1 and all E phonon modes predicted by the group-theory analysis. The splitting energy between the LO and TO components of polar E phonons is determined. A group of intense bands associated with the 5D4 → 7F0 electronic transition was observed in the energy range of 14520–14680 cm−1 of the luminescence spectra. The intensity of these bands decreases upon heating. At the same time, the bands which can be assigned with 5D4 → 7F6, 5D4 → 7F5, and 5D4 → 7F4 transitions were revealed in luminescence spectra at room temperature. The intensity of these bands is comparable to the intensity of the Raman spectrum of TbAl3(BO3)4. The observation of luminescence from the 5D4 multiplet (20600–20750 cm−1) upon excitation at λexc = 632.8 nm (15803 cm−1) and λexc = 532 nm (18797 cm−1) indicates strong nonlinear properties of the studied crystal. The structure of the main 7F6 multiplet of Tb+3 in the TbAl3(BO3)4 single crystal has been studied at 5 K by Raman spectroscopy. The energies of the electronic levels of 7F6 and 5D4 multiplets were determined from the luminescence spectra measured at 300 K.
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Публикация в журнале "Физика низких температур"
Peschanskii
A. V. Spectroscopic study of the TbAl3(BO3)4 single crystal: Raman and luminescence spectroscopy [Текст] / A. V.
Peschanskii
, A. Y. Glamazda, I. A. Gudim // Физ. низких температур. - 2020. - Т. 46 Вып. 12.- С.1437-1445
Держатели документа:
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine.
RAS, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Glamazda, A. Yu.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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4.
Peschanskii
, A. V.
Spectroscopic study of the TbAl3(BO3)4 single crystal: Raman and luminescence spectroscopy / A. V.
Peschanskii
, A. Y. Glamazda, I. A. Gudim> // Физ. низких температур. - 2020. -
Т. 46
,
Вып. 12
. - С. 1437-1445. - Cited References: 20 . - ISSN 0132-6414. - ISSN 1816-0328
РУБ
Physics, Applied
Рубрики:
SCATTERING
GENERATION
ND
Кл.слова (ненормированные):
TbAl3(BO3)4
--
vibrational spectrum
--
electronic transitions
--
Raman spectroscopy
--
luminescence
Аннотация:
The vibrational and luminescence properties of the TbAl3(BO3)4 single crystal were studied in the temperature range of 5–300 K. Raman spectra of the single crystal revealed 5 of 7 A1 and all E phonon modes predicted by the group-theory analysis. The splitting energy between the LO and TO components of polar E phonons is determined. A group of intense bands associated with the 5D4 → 7F0 electronic transition was observed in the energy range of 14520–14680 cm−1 of the luminescence spectra. The intensity of these bands decreases upon heating. At the same time, the bands which can be assigned with 5D4 → 7F6, 5D4 → 7F5, and 5D4 → 7F4 transitions were revealed in luminescence spectra at room temperature. The intensity of these bands is comparable to the intensity of the Raman spectrum of TbAl3(BO3)4. The observation of luminescence from the 5D4 multiplet (20600–20750 cm−1) upon excitation at λexc = 632.8 nm (15803 cm−1) and λexc = 532 nm (18797 cm−1) indicates strong nonlinear properties of the studied crystal. The structure of the main 7F6 multiplet of Tb+3 in the TbAl3(BO3)4 single crystal has been studied at 5 K by Raman spectroscopy. The energies of the electronic levels of 7F6 and 5D4 multiplets were determined from the luminescence spectra measured at 300 K.
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,
РИНЦ
,
Scopus
Переводная версия
Peschanskii
A. V. Spectroscopic study of the TbAl3(BO3)4 single crystal: Raman and luminescence spectroscopy [Текст] / A. V.
Peschanskii
, A. Y. Glamazda, I. A. Gudim // Low Temp. Phys. - 2020. - Vol. 46 Is. 12.- P.1223-1230
Держатели документа:
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine.
RAS, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Glamazda, A. Yu.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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