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Study of structural and physical-properties of cesium and lithium double sulfate / K. S. Aleksandrov [и др.] // Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 12. - P. 3673-3677. - Cited References: 6 . - ISSN 0367-3294

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Публикация на русском языке Исследование структурных и физических свойств двойного сульфата и цезия и лития [Текст] / К. С. Александров [и др.] // Физ. тверд. тела. - 1980. - Т. 22 Вып. 12. - С. 3673-3677

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Zherebtsova, L. I.; Iskornev, I. M.; Искорнев, Игорь Михайлович; Kruglik, A. I.; Круглик, Анатолий Иванович; Rozanov, O. V.; Flerov, I. N.; Флёров, Игорь Николаевич
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Investigation of structural and physical properties of cesium-lithium double sulfate / K. S. Aleksandrov [и др.] // Sov. Phys. Solid State. - 1980. - Vol. 22, Is. 12. - P. 2150-2152 ; Phys. Solid State . - ISSN 0584-5807
Кл.слова (ненормированные):
LITHIUM COMPOUNDS -- FERROELASTICITY -- PHASE TRANSITIONS -- CESIUM COMPOUNDS
Аннотация: A study was made of the temperature dependences of the integrated intensities of the 006 and 021 x-ray reflections, deviation of the angle gamma from 90 degree , NMR of **7Li, specific heat c//p, thermal expansion, and permittivity. Moreover, the effects of hydrostatic pressure on the phase transition were studied. It was definitely established that a ferroelastic phase transition of the second kind occurs at 202. 07 degree K and this transition does not alter the number of atoms in a unit cell.

Scopus

Доп.точки доступа:
Aleksandrov, K. S.; Zherebtsova, L. I.; Iskornev, I. M.; Kruglik, A. I.; Rozanov, O. V.; Flerov, I. N.

}
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Ferroelectricity in caesium lithium molybdate CsLiMoO4 and related crystals CsLiWO4 and RbLiMoO4 / K. S. Aleksandrov [и др.] // Ferroelectrics. - 1981. - Vol. 36, Is. 1. - P. 399-402, DOI 10.1080/00150198108218138 . - ISSN 0015-0193
Кл.слова (ненормированные):
CESIUM COMPOUNDS -- RUBIDIUM COMPOUNDS -- CESIUM LITHIUM MOLYBDATE -- CESIUM LITHIUM TUNGSTATE -- PHASE TRANSITIONS -- RUBIDIUM LITHIUM MOLYBDATE -- FERROELECTRIC MATERIALS
Аннотация: Successive ferroelectric phase transitions were discovered in CsLiMoO//4, CsLiWO//4 and RbLiMoO//4 single crystals. Strong elastic and no dielectric anomalies were found with temperature lowering in the initial cubic phases. The phase transitions are qualitatively described as pseudoproper ferroelectric ones.

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; ANISTRATOV, A. T.; Melnikova, S. V.; Мельникова, Светлана Владимировна; Klevtsov, P. V.; Kruglik, A. I.; Voronov, V. N.; Воронов, Владимир Николаевич; International meeting on ferroelectricity(5 ; 1981 ; 17-21 Aug. ; Universal Park, USA)
}
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Aleksandrov, K. S.
Structural aspects of phase transitions in crystals / K. S. Aleksandrov // Ferroelectrics. - 1983. - Vol. 53, Is. 1. - P. 153-154, DOI 10.1080/00150198408245044 . - ISSN 0015-0193

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

Кл.слова (ненормированные):
FERROELECTRIC MATERIALS -- LITHIUM COMPOUNDS - X-Ray Analysis -- PHASE TRANSITIONS -- CRYSTALS
Аннотация: Modern X-ray methods obtain in a short time the complete set of structural amplitudes and solve a crystal structure at constant temperatures (or pressures) on both sides of phase transition. A review of structure investigations with the crystals having the common formula Me prime Me double prime BX//4 (Me prime , Me double prime equals Li, Na, K, Rb, Cs, NH//4 and H; BX//4**2** plus equals SO//4, SeO//4, BeF//4, ZnCl//4) is presented.

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Доп.точки доступа:
Александров, Кирилл Сергеевич; European Meeting on Ferroelectricity(5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp)
}
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Aleksandrov, K. S.
Spectroscopic investigation of phase transitions in CsLiMoO//4 crystals. / K. S. Aleksandrov, Yu. N. Ivanov, A. D. Schafer // Ferroelectrics. - 1983. - Vol. 55, Is. 1. - P. 671-674 . - ISSN 0015-0193
Кл.слова (ненормированные):
CRYSTALS - Structure -- MAGNETIC RESONANCE -- SPECTROSCOPY, RAMAN -- CESIUM LITHIUM MOLYBDATE -- PHASE TRANSITIONS -- FERROELECTRIC MATERIALS
Аннотация: Raman and NMR spectra in cubic and two distorted phases of CsLiMoO//4 have been studied. Phase transitions in the crystal are shown to belong to order-disorder type.

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Доп.точки доступа:
Ivanov, Y. N.; Иванов, Юрий Николаевич; Schafer, A. D.; Александров, Кирилл Сергеевич; European Meeting on Ferroelectricity(5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp)
}
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Acoustooptic and elastic properties of NaBi(WO4)2 and LiBi(MoO4)2crystals / K. S. Aleksandrov [et al.] // Russ. Ultrason. - 1988. - Vol. 18, Is. 3. - P. 168-171 . - ISSN 0048-8828
Кл.слова (ненормированные):
Acoustooptical Devices--Materials -- Elasticity -- Lithium Compounds -- Sodium Compounds -- Acoustooptic Properties -- Bulk Acoustic Waves -- Elastic Properties -- Crystals
Аннотация: In recent years interest has been shown in crystals with the scheelite structure (point symmetry group 4/m) as promising materials for acoustooptic devices. However, nearly all the work done so far has been on the NaBi(MoO4)2 and PbMoO4 crystals. In this paper the authors give the results of a study of the elastic and acoustooptic properties of NaBi(WO4)2 and LiBi(MoO4)2 crystals from a series of isomorphic compounds with the scheelite structure carried out in order to determine the extent of the changes in the elastic and acoustooptic properties of this series of crystals when the structural elements are changed.

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Держатели документа:
USSR Acad of Sciences, Russian Federation

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Burkov, S. I.; Samkov, A. V.; Kholov, A.; Khafizov, S.Kh.; Shabanova, L. A.; Klevtsov, P. V.; Красноярский государственный университет
}
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Makarova, I. P.
X-ray diffraction study of RbLiCrO4 / I. P. Makarova, I. A. Verin, K. S. Aleksandrov // Ferroelectrics. - 1991. - Vol. 124, Is. 1. - P. 91-96, DOI 10.1080/00150199108209420. - Cited References: 12 . - ISSN 0015-0193

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
LITHIUM POTASSIUM-SULFATE
   THERMAL VIBRATIONS
   CRYSTALS
   PROGRAM
   KLISO4
   LIKSO4
Аннотация: Crystal structure of RbLiCrO4 was determined in G3 phase (sp. gr. P31c) at 293, 428, 493, 523 K and in G2 phase (sp. gr. P63) at 553, 583 K applying X-ray diffraction data. The investigated crystals exhibit ‘twinning by merohedry’. The analysis of intensities and influence of anomalous scattering on them allowed us to choose twin elements and atomic configurations of twin domains for all the investigated specimens.

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Доп.точки доступа:
Verin, I. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; European meeting on ferroelectricity(7 ; 1991 ; Jul ; 08-12 ; Dijon, France)
}
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Makarova, I. P.
Structure and twinning of RbLiCrO4 crystals / I. P. Makarova, I. A. Verin, K. S. Aleksandrov // Acta Crystallogr. B. - 1993. - Vol. 49. - P. 19-28, DOI 10.1107/S0108768192006141. - Cited References: 14 . - ISSN 0108-7681

РУБ Crystallography
Рубрики:
LITHIUM POTASSIUM-SULFATE
   NEUTRON-DIFFRACTION
   THERMAL VIBRATIONS
   KLISO4
   PROGRAM
   LIKSO4
Аннотация: The crystal structures of the G3 (space group P31c) and G2 (space group P6(3)) phases of RbLiCrO4 have been determined from X-ray diffraction data (Mo Kalpha radiation) at 293, 428, 493 and 523 K (G3 phase) and 553 and 583 K (G2 phase). The RbLiCrO4 crystals exhibit twinning by merohedry with twin laws in the G3 phase: 2 parallel-to [001], m perpendicular-to [001], 1BAR; in the G2 phase: m parallel-to [001], 2 perpendicular-to [001], 1BAR. The analysis of diffraction intensities and influence of anomalous scattering on them provided the unambiguous determination of the twin laws for all the specimens investigated. The structure has been refined using the approximation of the anharmonic thermal vibrations of atoms.

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Держатели документа:
ACAD SCI,INST PHYS,SIBERIAN DIV,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Verin, I. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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Piezoelectric properties of glassceramic based on lithium tetraborate / A. M. Sysoev [et al.] // Ferroelectrics. - 1996. - Vol. 186, Is. 1. - P. 277-280, DOI 10.1080/00150199608218083. - Cited References: 4 . - ISSN 0015-0193

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

Кл.слова (ненормированные):
Ceramic materials -- Crystal growth -- Dielectric properties -- Electroacoustic transducers -- Glass -- Hydrophones -- Lithium compounds -- Single crystals -- Acoustoelectric transducer -- Glass ceramic -- Lithium tetraborate -- Microcomposite materials -- Piezoelectric materials
Аннотация: The preparation and study of a glassceramic based on lithium tetraborate was carried out. It was shown that due to favourable piezoelectric properties this material has good prospects for use as acoustoelectric transducer in devices such as hydrophones.

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Доп.точки доступа:
Sysoev, A. M.; Сысоев, Анатолий Михайлович; Parshikov, S. A.; Zaitsev, A. I.; Зайцев, Александр Иванович; Zamkov, A. V.; Замков, Анатолий Васильевич; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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10.

Bulk acoustic waves propagation in Li2B4O7 piezoelectric crystals under the static uniaxial mechanical pressure / K. S. Aleksandrov [et al.] // Proceedings of the Annual IEEE International Frequency Control Symposium / Annual frequency control symposium (54 ; 2000 ; Jun. ; 7-9 ; Kansas, MO). - 2000. - P. 214-217. - Cited References: 8 . - ISBN 01616404
Кл.слова (ненормированные):
Acoustic wave transmission -- Acoustic wave velocity -- Elasticity -- Lithium compounds -- Mathematical models -- Permittivity -- Piezoelectricity -- Pressure effects -- Single crystals -- Electromechanical constants -- Piezoelectric crystal -- Piezoelectric materials
Аннотация: The influence of uniaxial mechanical stresses on bulk acoustic waves velocity in piezoelectric crystals Li2B4O7 has been investigated. Electromechanical constants have determined.

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Turchin, P. P.; Sorokin, B. P.; Karpovich, A. A.; Nefedov, V. A.; Annual frequency control symposium(54 ; 2000 ; Jun. ; 7-9 ; Kansas, MO)
}
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11.

Magnetooptic activity of f-d and f-f electron transitions in Pr3+ in the glass matrix LiB3O5 / A. M. Potseluyko [et al.] // Physica B. - 2000. - Vol. 291, Is. 1-2. - P. 89-96, DOI 10.1016/S0921-4526(99)01869-4. - Cited References: 17 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
FARADAY-ROTATION
OXIDE GLASSES
Кл.слова (ненормированные):
Faraday rotation -- magnetooptic activity -- praseodymium -- Electron transitions -- Faraday effect -- Light absorption -- Lithium compounds -- Praseodymium compounds -- Faraday rotation -- Transition wavelength -- Optical glass
Аннотация: The results of absorption, Faraday rotation and magnetic circular dichroism measurements for glasses with the composition of LiB3O5 + Pr2O3 are presented. The effective wavelength of the transition giving the main contribution to Faraday rotation in these glasses is determined. The contributions of several f-f transitions to Faraday rotation are separated and their magnetooptical activities are evaluated in comparison with the activity of the f-d transition. (C) 2000 Elsevier Science B.V. All rights reserved.

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Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, SB RAS, 660036, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Potseluyko, A. M.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Zabluda, V. N.; Заблуда, Владимир Николаевич; Bolsunovskaya, O. A.; Zamkov, A. V.; Замков, Анатолий Васильевич; Parshikov, S. A.; Zaytsev, A. I.
}
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12.

Theoretical study of the toroidal forms of carbon and related endohedral complexes with lithium / A. A. Kuzubov [et al.] // Phys. Solid State. - 2001. - Vol. 43, Is. 10. - P. 1982-1988, DOI 10.1134/1.1410643. - Cited References: 11 . - ISSN 1063-7834

РУБ Physics, Condensed Matter

Аннотация: The atomic and electron structures of toroidal carbon molecules (C-240 and two C-120 isomers) and related endohedral complexes with lithium (Li-2@C-n and Li-4@C-n) were theoretically studied using both nonempirical (3-21G basis set) and semiempirical (MNDO) calculation schemes. For the metal-containing compounds, the behavior of lithium atoms embedded into internal cavities of the carbon framework was studied using methods of molecular dynamics. It is demonstrated that the structure of electron levels of metal-containing carbon complexes exhibits an embedded state in the forbidden band, which appears due to the presence of electrons accepted from metal atoms. The position of this embedded state and the bandgap width depend both on the initial carbon structure and on the amount of metal atoms incorporated. (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Krasnoyarsk State Tech Univ, Krasnoyarsk, Russia
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Div, Krasnoyarsk, Russia
ИФ СО РАН
ИХХТ СО РАН
Krasnoyarsk Stt. Tech. University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Inst. of Chem. and Chem. Technology, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Avramov, P. V.; Аврамов, Павел Вениаминович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Varganov, S. A.; Tomilin, F. N.; Томилин, Феликс Николаевич
}
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13.

Magnetic phase transitions in the double spin-chains compound LiCu2O2 / B. . Roessli [et al.] // Physica B. - 2001. - Vol. 296, Is. 4. - P. 306-311, DOI 10.1016/S0921-4526(00)00574-3. - Cited References: 17 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
ORDERED MOMENT
   COPPER
   CRYSTAL
   LI2CUO2
Кл.слова (ненормированные):
muon-spin rotation -- spin ladder -- magnetic ordering -- LiCu2O2 -- Crystal structure -- Lithium compounds -- Magnetic anisotropy -- Magnetic field effects -- Magnetic relaxation -- Magnetization -- Order disorder transitions -- Specific heat of solids -- X ray diffraction analysis -- Anisotropic line broadening -- Muon spin rotation -- Spin ladder -- Antiferromagnetic materials
Аннотация: We report high-resolution X-ray diffraction, muon-spin-rotation spectroscopic and specific heat measurements in the double spin-chains compound LiCu2O2. The X-ray diffraction results show that the crystal structure of LiCu2O2 is orthorhombic down to T = 10 K. Anisotropic line-broadening of the diffraction peaks is observed, indicating disorder along the spin chains. Muon-spin relaxation and specific heat measurements show that LiCu2O2 undergoes a phase transition to a magnetic ordered state at T-1 similar to 24 K. The specific heat data exhibits a second lambda -like peak at T-2 similar to 32.5 K, which increases with increasing magnetic field in a similar way to that found in spin-ladder compounds. (C) 2001 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
ETH Zurich, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Univ Lausanne, Inst Crystallog, CH-1015 Lausanne, Switzerland
RAS, SB, Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Laboratory for Neutron Scattering, Paul Scherrer Inst. and ETH Zurich, CH-5232 Villigen PSI, Switzerland
Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
Lab. for Muon-Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
Institut de Crystallographie, Universite de Lausanne, CH-1015 Lausanne, Switzerland
Institute of Physics SB RAS, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Roessli, B.; Staub, U.; Amato, A.; Herlach, D.; Pattison, P.; Sablina, K. A.; Саблина, Клара Александровна; Petrakovskii, G. A.; Петраковский, Герман Антонович
}
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14.

Electronic and atomic structures of the isomers of endohedral and exohedral fullerene complexes with two lithium atoms / A. A. Kuzubov [et al.] // Phys. Solid State. - 2001. - Vol. 43, Is. 9. - P. 1794-1799, DOI 10.1134/1.1402242. - Cited References: 21 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
VIBRATION-ROTATION BANDS
   INFRARED ROTATION
   C-60
   BUCKMINSTERFULLERENE
   ION
Аннотация: The electronic structures of all the possible isomers of endohedral and exohedral C(60) fullerene complexes with two lithium atoms are theoretically investigated. It is found that the electronic structures of these compounds are characterized by an impurity filled-level state determining the band gap. The location of the impurity state and, correspondingly, the band gap of the exohedral fullerene complexes depend on the coordination mode and the distance between the alkali metal ions. A similar dependence is observed for the total energy of the exohedral fullerene complex under investigation. (C) 2001 MAIK "Nauka/ Interperiodica".

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Держатели документа:
Krasnoyarsk State Tech Univ, Krasnoyarsk, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
ИХХТ СО РАН

Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Avramov, P. V.; Аврамов, Павел Вениаминович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Varganov, S. A.; Tomilin, F. N.; Томилин, Феликс Николаевич
}
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15.

Alekseev, K. N.
Optical chaos in nonlinear photonic crystals / K. N. Alekseev, A. V. Ponomarev // JETP Letters. - 2002. - Vol. 75, Is. 4. - P. 174-178, DOI 10.1134/1.1475717. - Cited References: 34 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
POLED LITHIUM-NIOBATE
   3RD-HARMONIC GENERATION
   WAVE-GUIDES
   SUPERLATTICES
   CHI((2))
Аннотация: We examine the spatial evolution of lightwaves in a nonlinear photonic crystal with a quadratic nonlinearity, when a second harmonic and a sum-frequency generation are simultaneously quasi-phase-matched. We find the conditions for a transition to Hamiltonian chaos for different amplitudes of lightwaves at the crystal boundary. (C) 2002 MAIK "Nauka/ Interperiodica".

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Держатели документа:
Univ Oulu, Dept Phys Sci, FIN-90014 Oulu, Finland
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
Russian Acad Sci, LV Kirensky Phys Inst, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Dept Phys, Krasnoyarsk 660041, Russia
ИФ СО РАН
Max-Planck-Inst. Physik Komplexer S., D-01187 Dresden, Germany
Theor. of Nonlinear Processes Lab., Kirensky Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Department of Physics, Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ponomarev, A. V.
}
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16.

Investigation of the reconstructive phase transition between metastable (alpha) and stable (beta) modifications of the NH4LiSO4 crystal / S. V. Mel'nikova [et al.] // Phys. Solid State. - 2003. - Vol. 45, Is. 8. - P. 1572-1578, DOI 10.1134/1.1602898. - Cited References: 13 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
AMMONIUM LITHIUM-SULFATE
LINH4SO4
TEMPERATURE
Аннотация: Crystals of ammonium lithium sulfate NH4LiSO4 in alpha and beta modifications are studied, and conditions of their nucleation and growth are determined. The alpha modification of NH4LiSO4 and alpha--beta phase transitions are investigated using polarized light microscopy, x-ray diffraction, and differential scanning calorimetry in the temperature range 80-530 K. It is found that, depending on the conditions of growth and storage, there exist two temperature ranges (T(alpha--beta)approximate to340-350 and approximate to440-450 K) in which the crystals can undergo an alpha--beta reconstructive phase transition. The enthalpy of this transformation depends on the symmetry of the final phase. In the former case (340-350 K), the reconstructive phase transition leads to rapid destruction of the sample. In the latter case (440-450 K), the crystal structure undergoes a slow transformation (recrystallization) without noticeable distortions. The results obtained indicate that no structural phase transition occurs in the alpha modification of NH4LiSO4 at 250 K. (C) 2003 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Mel'nikova, S. V.; Мельникова, Светлана Владимировна; Kartashev, A. V.; Карташев, Андрей Васильевич; Grankina, V. A.; Flerov, I. N.; Флёров, Игорь Николаевич
}
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17.

Mel'nikova, S. V.
Optical investigations of the effect of gradual substitution NH4 - Cs on the ferroelastic phase transition in a CsLiSO4 crystal / S. V. Mel'nikova, V. A. Grankina // Phys. Solid State. - 2004. - Vol. 46, Is. 3. - P. 515-520, DOI 10.1134/1.1687871. - Cited References: 14 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
AMMONIUM LITHIUM-SULFATE
TEMPERATURE PHASE
NH4LISO4
Аннотация: Crystals of Cs-x(NH4)(1 - x)LiSO4 (0.39 less than or equal to x less than or equal to 1.0) solid solutions are grown and investigated using polarized light microscopy and measurements of the birefringence in the temperature range 100-530 K. The (x-T) phase diagram of the Cs-x(NH4)(1 - x)LiSO4 solid solutions is constructed. It is demonstrated that, upon substitution of ammonium for cesium in the CsLiSO4 crystal, the phase transition temperature gradually increases to such a degree that the ferroelastic phase can exist at room temperature. The triple point of intersection of the Pmcn, P2(1)cn, and P112(1)/n phase boundaries is determined. It is established that the introduction of ammonium in small amounts has an unusually strong effect on the refractive properties and character of the ferroelastic phase transition in the CsLiSO4 crystal. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Grankina, V. A.; Мельникова, Светлана Владимировна
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18.

Zobov, V. E.
The coordinate of a singular point of the time correlation functions for a heteronuclear spin system of a crystal / V. E. Zobov, M. A. Popov // J. Exp. Theor. Phys. - 2005. - Vol. 100, Is. 4. - P. 775-783, DOI 10.1134/1.1926438. - Cited References: 24 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
FLUCTUATION SPECTRUM
   CROSS-RELAXATION
   NMR ABSORPTION
   SHAPE
   WINGS
   LINE
Кл.слова (ненормированные):
Correlation methods -- Crystal lattices -- Crystallography -- Functions -- Integral equations -- Lithium compounds -- Nuclear magnetic resonance -- Quantum theory -- Random processes -- Autocorrelation functions (ACF) -- Dipole-dipole interactions (DDI) -- Heteronuclear spin systems -- Self-consistent fluctuating field (SCFF) -- Crystals
Аннотация: The singularities of the time autocorrelation functions (ACFs) for a heteronuclear spin system of a crystal are investigated. Exact expressions are obtained for ten moments of the spectra of ACFs in the approximation of a self-consistent fluctuating field (SCFF) with arbitrary axial symmetry. These expressions are applied to determine the coordinate of the lowest singular point of these functions on the imaginary-time axis for a spin system with a dipole-dipole interaction (DDI). The leading corrections to this coordinate due to the correlation of local fields in real crystals are calculated. These corrections are determined by lattice sums with triangles of four bonds and pairs of four bonds. Numerical values of the coordinate are obtained for a LiF crystal in a magnetic field directed along three crystallographic axes. An increase in the coordinate of the singular point, which follows from the theory and leads to a faster falloff of the wings of the ACF spectra, qualitatively agrees with experiment. © 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Popov, M. A.; Зобов, Владимир Евгеньевич
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19.

Magneto-optical properties of Dy3+ in oxide glasses: The origin of the magneto-optical activity of f-f transitions and its anomalous temperature dependence / A. V. Malakhovskii [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 4. - P. 701-707, DOI 10.1134/S1063783407040178. - Cited References: 28 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC CIRCULAR-DICHROISM
   FLUOROZIRCONATE ZBLAN GLASS
   OPTICAL-ABSORPTION SPECTRA
   DOPED SODA GLASS
   SPECTROSCOPIC PROPERTIES
   FLUOROBORATE GLASSES
   LITHIUM BORATE
   IONS
   PR3+
   GADOLINIUM
Аннотация: The temperature dependence of the absorption spectra and magnetic circular dichroism due to f-f transitions from the H-6(15/2) to F-6 (5/2) and (6)(F (7/2) + H (5/2)) states in the Dy3+ ion in (Dy2O3-P2O5-SiO2-GeO2) and (Dy2O3-La2O3-Al2O3-B2O3-SiO2-GeO2) glasses and the temperature dependence of the Faraday effect were studied. The temperature dependence of the Faraday effect caused by f-d transitions was found to differ from that of the magnetic circular dichroism due to f-f transitions. It was shown that f-f transitions occur preferentially in Dy3+ ions associated into clusters. The origin of the paramagnetic magneto-optical activity of f-f transitions was analyzed. It was shown that the contributions to this activity can differ in value and sign and that the ratio between these contributions depends on the transition type. In some cases, this difference results in an anomalous temperature dependence of the magneto-optical activity.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
SI Vavilov State Opt Inst, St Petersburg 192371, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation
Vavilov State Optical Institute, Birzhevaya liniya 12, St. Petersburg, 192371, Russian Federation

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Isachenko, V. A.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Potseluyko, A. M.; Zabluda, V. N.; Заблуда, Владимир Николаевич; Zarubina, T. V.; Edelman, I. S.; Эдельман, Ирина Самсоновна
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20.

Optical properties of trigonal single crystals (Yb, Tm)Al3(BO3)4 grown from fluxes based on the Bismuth and lithium molibdates [Текст] / V. L. Temerov, A. E. Sokolov [и др.] // Crystallography Reports. - 2008. - Vol. 53. - С. 1157

Доп.точки доступа:
Temerov, V.L.; Sokolov, A.E.; Sukhachev, A.L.; Bovina, A.F.; Edel’man, I.S.; Malakhovskii, A.V.
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