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High-resolution spectroscopy of YbAl(3)(BO(3))(4) stoichiometric nonlinear laser crystals / M. N. Popova [et al.] // J. Phys.: Condens. Matter. - 2008. - Vol. 20, Is. 45. - Ст. 455210, DOI 10.1088/0953-8984/20/45/455210. - Cited References: 20. - The authors thank E Antic-Fidancev for helpful discussions on the 'barycenter curves', P Aschehoug for technical assistance, and B Mavrin for assistance in Raman spectra measurements. This work was supported by the CNRS-RAS exchange program (project No. 21241), by the Russian Foundation for Basic Research (Grants Nos 07-02-01185 and 06-02-16088), and by the Russian Academy of Sciences under the Programs for Basic Research. . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
YB-YAB LASER
   GROWTH
   FREQUENCY
   BORATE
Кл.слова (ненормированные):
Crystal symmetry -- Crystals -- Light emission -- Light sources -- Luminescence -- Spectroscopic analysis -- Ytterbium -- Electronic levels -- High resolutions -- Luminescence spectroscopies -- Main lines -- Nonlinear laser crystals -- Raman spectrums -- Vibronic structures -- Weak lines -- Single crystals
Аннотация: We present temperature-dependent high-resolution polarized transmittance spectroscopy as well as luminescence spectroscopy of YbAl(3)(BO(3))(4) single crystals. Positions and symmetries of all the Yb(3+) crystal-field electronic levels have been found from the analysis of the spectra. Near the main line of the optical transition (2)F(7/2)(0) -> (2)F(5/2)(0) we observe a lot of narrow weak lines. These lines point to the presence of several different distorted sites of Yb(3+). We analyze the possible origin of the distorted sites. Vibronic structure in transmittance and luminescence spectra was observed and compared with room-temperature Raman spectra.

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Держатели документа:
[Popova, M. N.
Boldyrev, K. N.] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
[Petit, P. O.
Viana, B.] Ecole Natl Super Chim Paris 11, Lab Chim Mat Condensee Paris, CNRS UMR 7574, F-75005 Paris, France
[Bezmaternykh, L. N.] RAS, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Spectroscopy, Russian Academy of Sciences, 5 Fizicheskaya street, Troitsk, Moscow region 142190, Russian Federation
Laboratoire de Chimie de la Matiere Condensee de Paris, CNRS-UMR 7574, Ecole Nationale Superieure de Chimie de Paris 11, rue Pierre et Marie Curie, F-75005 Paris, France
Kirenskii Institute of Physics, Siberian Branch, RAS, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Popova, M. N.; Boldyrev, K. N.; Petit, P. O.; Viana, B.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
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Optical spectroscopy of PrFe3(BO3)(4): Crystal-field and anisotropic Pr-Fe exchange interactions / M. N. Popova [et al.] // Phys. Rev. B. - 2009. - Vol. 80, Is. 19. - Ст. 195101, DOI 10.1103/PhysRevB.80.195101. - Cited References: 36. - We thank S. Klimin for useful information concerning the structure of PrFeINF3/INF(BOINF3/INF)INF4/INF and E. Chukalina for participating in some measurements. This work was supported in part by the Russian Foundation for Basic Research (Grants No. 07-02-01185 and No. 09-02-00930) and by the Russian Academy of Sciences under the Programs for Basic Research. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
TRIGONAL GDFE3(BO3)(4)
   NDFE3(BO3)(4)
   DYFE3(BO3)(4)
   TRANSITIONS
   BORATE
   ION
   ND
Кл.слова (ненормированные):
antiferromagnetic materials -- crystal field interactions -- exchange interactions (electron) -- infrared spectra -- iron compounds -- magnetic susceptibility -- magneto-optical effects -- paramagnetic materials -- praseodymium compounds -- spin Hamiltonians -- visible spectra
Аннотация: High-resolution polarized optical absorption spectra of PrFe3(BO3)(4) in the paramagnetic and antiferromagnetic phases are reported. The measured energies of the crystal-field (CF) levels within the 4f(2) configuration of Pr3+ in the paramagnetic PrFe3(BO3)(4) are described by the CF model that involves the 4f(2)/4f5d and 4f(2)/4f6p configuration interactions. Ordering of Fe spins along the crystalline c axis below T-N=32 K is confirmed by the analysis of the spectra of Er3+ introduced as a probe into PrFe3(BO3)(4). To account for the observed changes in the optical spectra of Pr3+ at temperatures below T-N, in particular, for the shift of the CF levels, splitting of the CF doublets, and the appearance of forbidden lines, the Pr-Fe exchange Hamiltonian defined by seven parameters is considered. The theoretical approach has been tested by calculating the temperature dependence of the magnetic susceptibility. A good agreement between theory and optical and magnetic experimental data is found demonstrating the validity of the model used. The obtained results confirm that the model of the iron dimers inside the spiral chains of Fe3+(O2-)(6) octahedrons introduced by us earlier for NdFe3(BO3)(4) and modified in the present work may serve as a basis for analyzing the low-temperature properties of other rare-earth iron borates.

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Держатели документа:
[Popova, M. N.
Stanislavchuk, T. N.] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
[Malkin, B. Z.] Kazan VI Lenin State Univ, Kazan 420008, Russia
[Bezmaternykh, L. N.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, 142190 Moscow Region, Russian Federation
Kazan State University, 420008 Kazan, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch, RAS, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Popova, M. N.; Stanislavchuk, T. N.; Malkin, B. Z.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Russian Foundation for Basic Research [07-02-01185, 09-02-00930]; Russian Academy of Sciences under the Programs for Basic Research
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PATRIN, G. S.
STUDY OF PHOTOINDUCED MAGNETISM IN FEBO3 CRYSTALS WITH A SQUID-MAGNETOMETER / G. S. PATRIN, D. A. VELIKANOV, G. A. PETRAKOVSKII // Zhurnal Eksperimentalnoi Teor. Fiz. - 1993. - Vol. 103, Is. 1. - P. 234-251. - Cited References: 28 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
RESONANCE
BORATE
Аннотация: The results are given of experimental and theoretical study for the photoinduced variation of the magnetic moment in FeBO3. In the experiment a SQUID-magnetometer provided with the optical pump system is used. The study of field, temperature and time dependences of the photoinduced magnetic moment variation for various levels of the optical emission power allows to find the mechanism responsible for changing magnetic state under irradiation. All the experimental results are explained within the model in which the crystal-matrix is described in the continual approximation and a photocenter, probably, Fe2+ ion is done as a quasi Ising S=1 ion coupled by exchange with one of the crystal magnetic sublattice. Under illuminating the redistribution of the principal multiplet level populations occurs so that the level of the stronger anisotropic character is populated predominantly due to the selection rules. The model used allows to calculate and explain the anisotropic properties of FeBO3 crystals and spin-flip transition in the basal plane at low temperature.

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Доп.точки доступа:
VELIKANOV, D. A.; PETRAKOVSKII, G. A.
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Resonant Pumping of d-d Crystal Field Electronic Transitions as a Mechanism of Ultrafast Optical Control of the Exchange Interactions in Iron Oxides / R. V. Mikhaylovskiy, T. J. Huisman, V. A. Gavrichkov [et al.] // Phys. Rev. Lett. - 2020. - Vol. 125, Is. 15. - Ст. 157201, DOI 10.1103/PhysRevLett.125.157201. - Cited References: 46. - We thank A. Toonen and S. Semin for technical assistance. The work at Radboud University was supported by de Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) and the European Research Council ERC Grant Agreement No. 339813 (Exchange). R. V. M. thanks ERC, Grant Agreement No. 852050 (MAGSHAKE). V. A. G., S. I. P., and S. G. O. are thankful to the Russian Science Foundation for the financial support under the Grant No. 18-12-00022. The theoretical part of this research was performed by V. A. G., S. I. P., and S. G. O. under the RSF Grant No. 18-12-00022. The contribution of R. V. P. into the experimental part was supported by the RSF Grant No. 16-12-10456 . - ISSN 0031-9007. - ISSN 1079-7114
Рубрики:
BORATE
Аннотация: The microscopic origin of ultrafast modification of the ratio between the symmetric (J) and antisymmetric (D) exchange interaction in antiferromagnetic iron oxides is revealed, using femtosecond laser excitation as a pump and terahertz emission spectroscopy as a probe. By tuning the photon energy of the laser pump pulse we show that the effect of light on the D/J ratio in two archetypical iron oxides FeBO3 and ErFeO3 is maximized when the photon energy is in resonance with a spin and parity forbidden d-d transition between the crystal-field split states of Fe3+ ions. The experimental findings are supported by a multielectron model, which accounts for the resonant absorption of photons by Fe3+ ions. Our results reveal the importance of the parity and spin-change forbidden, and therefore often underestimated, d-d transitions in ultrafast optical control of magnetism.

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Держатели документа:
Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalseweg 135, NL-6525 AI Nijmegen, Netherlands.
Univ Lancaster, Dept Phys, Lancaster LA1 4YW, England.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Delft Univ Technol, Kavli Inst Nanosci, POB 5046, NL-2600 GA Delft, Netherlands.
Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Mikhaylovskiy, R., V; Huisman, T. J.; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Polukeev, S. I.; Полукеев, Семен Игоревич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Afanasiev, D.; Pisarev, R., V; Rasing, T.h.; Kimel, A., V
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