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Ferroelectricity and phase-transition from incommensurate phase into commensurate one in (NH4)2ZnCl4 / I. A. Belobrova [et al.] // Solid State Commun. - 1980. - Vol. 33, Is. 11. - P. 1101-1102, DOI 10.1016/0038-1098(80)91083-2. - Cited References: 4 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

WOS,
Scopus
Держатели документа:
L.V. Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Belobrova, I. A.; Moskalev, A. K.; Bizukina, N. V.; Milul, S. V.; Aleksandrova, I. P.; Александрова, Инга Петровна
}
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Measurement of the maximum content of bound water in bentonitic clay using dielectric and NMR methods / V. L. Mironov [et al.] // Russ. Phys. J. - 2011. - Vol. 54, Is. 1. - P. 71-76. - Cited References: 4 . - ISSN 1064-8887

РУБ Physics, Multidisciplinary

Кл.слова (ненормированные):
dielectric permittivity -- nuclear magnetic resonance -- bentonitic clay -- bound water
Аннотация: An investigation of moisture dependences of refractive index and spectral width of the nuclear magnetic resonance (NMR) is performed for bentonitic clay specimens at different temperatures. These moisture dependences allowed identifying two types of moisture: bound and free water. The maximum content of water in the bentonitic clay is measured.

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Держатели документа:
[Mironov, V. L.
Sukhovskii, A. A.
Lukin, Yu. I.
Aleksandrova, I. P.] Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk, Russia
ИФ СО РАН

Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Sukhovskii, A. A.; Суховский, Андрей Андреевич; Lukin, Y. I.; Лукин, Юрий Иванович; Aleksandrova, I. P.; Александрова, Инга Петровна
}
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Popov, M. A.
Effect of fluctuations on the NQR spectrum in the incommensurate phase of a Cs2ZnI4 crystal / M. A. Popov, I. P. Aaleksandrova, S. V. Primak // JETP Letters. - 1994. - Vol. 59, Is. 7. - P. 485-487. - Cited References: 5 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary

Аннотация: The direct spin-lattice relaxation due to local thermal fluctuations of the amplitude of the atomic-displacement wave -in the incommensurate phase of a crystal can strongly influence the lineshape of the resonant spectrum, reducing the intensity of the outermost temperature-dependent peaks in the frequency distribution, while having essentially no effect on the temperature-independent features of this distribution. This effect is apparently the reason for the anomalous behavior of the NQR spectrum of I-127 in Cs2ZnI4 in a certain temperature interval near the transition from the ''normal'' phase to the incommensurate phase.

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Держатели документа:
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Primak, S. V.
}
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NMR lineshape and phase soliton effects in incommensurate Rb2ZnCl4 / R. Blinc, I. P. Aleksandrova, A. S. Chaves [et al.] // Journal of Physics C - Solid State Physics. - 1982. - Vol. 15, Is. 3. - P. 547-563, DOI 10.1088/0022-3719/15/3/019. - Cited References: 20 . - ISSN 0022-3719

РУБ Physics, Condensed Matter

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Scopus
Держатели документа:
UNIV FED MINAS GERAIS,INST CIENCIAS EXACTAS,DEPT PHYS,BELO HORIZONTE,MG,BRAZIL
NUCL RES CTR DEMOCRITOS,AGHIA PARASKEVI ATTIKIS,ATHENS,GREECE
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
ИФ СО РАН
J. Stefan Inst., E. Kardelj Univ. of Ljubljana, Ljubljana, Slovenia
Доп.точки доступа:
Blinc, R.; Aleksandrova, I. P.; Александрова, Инга Петровна; Chaves, A. S.; Milia, F.; Rutar, V.; Seliger, J.; Topic, B.; Zumer, S.
}
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Rb-87 electric-field-gradient tensors in incommensurate Rb2ZnCl4 / V. Rutar [et al.] // Phys. Rev. B. - 1981. - Vol. 24, Is. 5. - P. 2397-2402, DOI 10.1103/PhysRevB.24.2397. - Cited References: 19 . - ISSN 0163-1829

РУБ Physics, Condensed Matter

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Scopus
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
ИФ СО РАН
J. Stefan Institute, E. Kardelj University of Ljubljana, Ljubljana, Slovenia
L. V. Kirensky Institute of Physics, Krasnoyarsk
Доп.точки доступа:
Rutar, V.; Seliger, J.; Topic, B.; Blinc, R.; Aleksandrova, I. P.; Александрова, Инга Петровна
}
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RB-87 nmr lineshape study of the incommensurate phase in Rb2ZnBr4 / R. . BLINC [et al.] // Solid State Commun. - 1980. - Vol. 34, Is. 11. - P. 895-898, DOI 10.1016/0038-1098(80)90120-9. - Cited References: 9 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

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Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
CATHOLIC UNIV NIJMEGEN,PHYS LAB,NIJMEGEN,NETHERLANDS
CATHOLIC UNIV NIJMEGEN,MAT RES INST,NIJMEGEN,NETHERLANDS
ИФ СО РАН
Доп.точки доступа:
Blinc, R.; Rutar, V.; Seliger, J.; Zumer, S.; Rasing, T.; Aleksandrova, I. P.; Александрова, Инга Петровна
}
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Aleksandrova, I. P.
High-pressure nqr study of the ferroelectric phase-transition in Rb2ZnBr4 / I. P. Aleksandrova, E. V. Shemetov, V. L. Serebrennikov // Fiz. Tverd. Tela. - 1987. - Vol. 29, Is. 9. - P. 2651-2657. - Cited References: 13 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
Shemetov, E. V.; Serebrennikov, V. L.; Александрова, Инга Петровна
}
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Aleksandrova, I. P.
Dielectric permittivity behavior at nonequilibrium processes in nh4hseo4 ferroelectrics / I. P. Aleksandrova, I. V. Seryukova, L. I. Zherebtsova // Fiz. Tverd. Tela. - 1985. - Vol. 27, Is. 11. - P. 3438-3441. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
Seryukova, I. V.; Zherebtsova, L. I.; Александрова, Инга Петровна
}
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Dislocation instability of an incommensurate phase in connection with the floating phase in an NH4HSeO4 crystal / I. P. Aleksandrova, Yu. N. Moskvich, O. V. Rozanov [et al.] // JETP Letters. - 1984. - Vol. 40, Is. 4. - P. 879-881. - Cited References: 7 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary

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Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Moskvich, Yu. N.; Москвич, Юрий Николаевич; Rozanov, O. V.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Sukhovskii, A. A.; Суховский, Андрей Андреевич
}
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10.

Aleksandrova, I. P.
Study of phase-transitions in nh4hseo4-family mixed-crystals / // Fiz. Tverd. Tela. - 1993. - Vol. 35, Is. 10. - P. 2664-2670. - Cited References: 10 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
ND4DSEO4

WOS

Доп.точки доступа:
Sukhovskii, A. A.; Rozanov, O. V.; Александрова, Инга Петровна
}
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11.

On the sequence of phase-transitions in monoclinic rubidium dihydrophosphate / I. P. Aleksandrova [и др.] // Fiz. Tverd. Tela. - 1991. - Vol. 33, Is. 10. - P. 2938-2944. - Cited References: 9 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
RBD2PO4
NMR

WOS

Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Elizarev, Y. G.; Moskvich, Yu. N.; Kabanov, I. S.; Shuvalov, L. A.
}
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12.

Phase-transition sequence in CS2ZnI4 / I. P. Aleksandrova [et al.] // Fiz. Tverd. Tela. - 1991. - Vol. 33, Is. 5. - P. 1344-1349. - Cited References: 4 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Primak, S. V.; Shemetov, E. V.; Kruglik, A. I.
}
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13.

Detection of the incommensurate modulation of the hydrogen-bond double-minimum potential in the antiferroelectric phase of NH4HSEO4 / I. P. Aleksandrova [et al.] // Phys. Lett. A. - 1983. - Vol. 95, Is. 6. - P. 339-342, DOI 10.1016/0375-9601(83)90035-X. - Cited References: 15 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary

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Scopus
Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Rosanov, O. V.; Sukhovsky, A. A.; Суховский, Андрей Андреевич; Moskvich, Y. N.; Москвич, Юрий Николаевич
}
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14.

X-ray study of phase transitions in CS3Sb2I9 crystal / B. S. Bagautdinov [et al.] // Solid State Commun. - 1999. - Vol. 111, Is. 7. - P. 361-366, DOI 10.1016/S0038-1098(99)00217-3. - Cited References: 4 . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
CS3BI2I9
Кл.слова (ненормированные):
ferroelectrics -- X-ray scattering -- phase transitions -- Crystal growth -- Ferroelectric materials -- Phase transitions -- Single crystals -- Thermal effects -- X ray scattering -- Trigonal symmetry -- Cesium compounds
Аннотация: An X-ray study of three phase transitions (PTs) at 86, 78 and 72 K has been carried out for the trigonal modification of the Cs3Sb2I9 crystal (space group P-3m1, a = 8.460 Angstrom, c = 10.398 Angstrom). The T-c1 = 86 K PT preserves the trigonal symmetry and is associated with the doubling of the c-parameter. At T-c2 = 72 K a doubling of a and b is observed. An intermediate incommensurate phase with q(1) = 1/2c*, q(2) = (1/2 - delta)a* + 1/2c* has been detected in the temperature range of 78-72 K. The lock-in PT at 72 K has a first order character. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.

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Держатели документа:
Russian Acad Sci, Inst Crystallog, Moscow 117333, Russia
Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Univ Helsinki, FIN-00014 Helsinki, Finland
Univ Lausanne, Inst Christallog, CH-1015 Lausanne, Switzerland
ИФ СО РАН
Institute of Solid State Physics, RAS, 142432, Chernogolovka, Russian Federation
Institute of Crystallography, Russ. Acad. Sci., Leninski P., Moscow, Russian Federation
L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
University of Helsinki, FIN-00014, Helsinki, Finland
Universite de Lausanne, Institut de Christallographie, 1015, Lausanne-Dorigny, Switzerland

Доп.точки доступа:
Bagautdinov, B. S.; Novikova, M. S.; Aleksandrova, I. P.; Александрова, Инга Петровна; Blomberg, M. K.; Chapuis, G.
}
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15.

Micromechanism of proton conduction in a KHSeO4 crystal / Y. N. Ivanov [et al.] // Phys. Solid State. - 2006. - Vol. 48, Is. 9. - P. 1698-1702, DOI 10.1134/S1063783406090125. - Cited References: 11 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
EXCHANGE NMR
Аннотация: The proton exchange in a potassium hydrogen selenate crystal is investigated in detail. Partial deuteration of the crystal (approximately 80% of the protons are replaced by deuterons) makes it possible to use the method of nuclear magnetic resonance (NMR) on quadrupole nuclei to perform research into proton (deuteron) transport. In addition to conventional Fourier-transform NMR spectroscopy, elementary processes of deuteron chemical exchange are studied by two-dimensional NMR spectroscopy, which provides unique information regarding these processes. Slow exchange between protons of hydrogen bond chains and dimers consisting of two SeO4 groups is revealed. It is established that this process is responsible for the proton conduction in the potassium hydrogen selenate. The NMR data are compared with the results of dielectric measurements carried out at a frequency of 1 kHz.

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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Univ Leipzig, D-04103 Leipzig, Germany
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Leipzig University, Leipzig, D-04103, Germany

Доп.точки доступа:
Ivanov, Y. N.; Иванов, Юрий Николаевич; Sukhovsky, A. A.; Суховский, Андрей Андреевич; Aleksandrova, I. P.; Александрова, Инга Петровна; Michel, D.
}
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16.

Na-23 NMR in the relaxor ferroelectric Na1/2Bi1/2TiO3 / I. P. Aleksandrova [et al.] // Phys. Solid State. - 2006. - Vol. 48: 17th All-Russia Conference on the Physics of Ferroelectrics (VKS-XVII) (JUN 26-JUL 01, 2005, Penza, RUSSIA), Is. 6. - P. 1120-1123, DOI 10.1134/S106378340606031X. - Cited References: 8 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
NEUTRON-SCATTERING
PHASE-TRANSITION
NA0.5BI0.5TIO3
Аннотация: The Na-23 NMR spectra of a Na1/2Bi1/2TiO3 crystal are studied at frequencies of 79.4 and 15.7 MHz in the temperature range 150-720 K. It is revealed that, at all temperatures, the crystal contains regions with a nearly cubic matrix and polar clusters. The temperature dependence of the local distortion of the Na environment in the clusters is determined. The dynamics of the reorientation of the local cluster polarization in the tetragonal and trigonal NBT phases is analyzed.

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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, Ioffe Physicotech Inst, St Petersburg 194021, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russian Federation

Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Ivanov, Y. N.; Иванов, Юрий Николаевич; Sukhovskii, A. A.; Суховский, Андрей Андреевич; Vakhrushev, S. B.
}
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17.

Ferroelastic phase transition in Cs3Bi2I9: A neutron diffraction study / A. . Jorio [et al.] // Phys. Rev. B. - 2000. - Vol. 61, Is. 6. - P. 3857-3862, DOI 10.1103/PhysRevB.61.3857. - Cited References: 16 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
CRYSTAL
SCATTERING
CS3SB2I9
Аннотация: Crystalline Cs3Bi2I9, With the P6(3)/mmc symmetry at room temperature was studied by Laue and four-circle neutron diffractometry from room temperature down to 50 K. At T-0 = 220 K the crystal undergoes a second-order proper ferroelastic phase transition to a polydomain structure with a nonprimitive monoclinic C12/m1 space group. Satellites were not found below T-0, indicating that the continuous distribution of sites observed in previous I-127 nuclear quadrupole resonance experiments is due either to an undetected incommensurate phase characterized by a very small displacement amplitude, or due to the fraction of the crystal volume occupied by domain walls. We argue that thick domain walls are expected in the present structure due to the absence of mechanical compatibility between domains.

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Держатели документа:
Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil
Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Ecole Cent Paris, LSPMM, CNRS, UMR 8580, F-92295 Chatenay Malabry, France
CENS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
Univ Toulon & Var, LMMI, F-83957 La Garde, France
ИФ СО РАН

Доп.точки доступа:
Jorio, A.; Currat, R.; Myles, DAA; McIntyre, G. J.; Aleksandrova, I. P.; Александрова, Инга Петровна; Kiat, J. M.; Saint-Gregoire, P.
}
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18.

Chemical exchange in NH4HSeO4 single crystals studied by two-dimensional H-2 nuclear magnetic resonance / Y. N. Ivanov [et al.] // J. Phys.: Condens. Matter. - 1999. - Vol. 11, Is. 18. - P. 3751-3760, DOI 10.1088/0953-8984/11/18/310. - Cited References: 16 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
CONDUCTIVITY PROCESSES
AMMONIUM
Кл.слова (ненормированные):
Hydrogen bonds -- Nuclear magnetic resonance -- Single crystals -- Thermal effects -- Ammonium hydrogen selenate -- Ammonium compounds
Аннотация: Processes of chemical exchange of deuterons in partially deuterated ammonium hydrogen selenate, NH4HSeO4 (AHSe), crystals are investigated by means of H-2 nuclear magnetic resonance (NMR) experiments over a wide temperature range. The temperature dependencies of the quadrupole line splittings in the one-dimensional spectra of AHSe above 350 K revealed lineshape changes which are characteristic for chemical exchange processes. A detailed study of these exchange processes in AHSe is achieved by means of two-dimensional H-2 NMR experiments. In the temperature range investigated, a chemical exchange occurs only between those deuteron (proton) sites which are involved in hydrogen bonds (alpha- and beta-positions). It was established that the rates of exchange between all types of hydrogen-bound deuteron are approximately the same. Exchange between these positions and the deuterons in the ND4 groups could not be detected. On the basis of our findings, we finally discuss a model for the microscopic mechanism of hydrogen transport in AHSe.

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Держатели документа:
LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Univ Leipzig, Fak Phys & Geowissensch, D-04103 Leipzig, Germany
ИФ СО РАН
L V Kirensky Institute of Physics, Russian Academy of Science, Siberian Branch, 660036 Krasnoyarsk, Russian Federation
Universitat Leipzig, Fakultat fur Physik und Geowissenschaften, Linnestra?e 5, D-04103 Leipzig, Germany

Доп.точки доступа:
Ivanov, Y. N.; Иванов, Юрий Николаевич; Totz, J.; Michel, D.; Klotzsche, G.; Sukhovsky, A. A.; Суховский, Андрей Андреевич; Aleksandrova, I. P.; Александрова, Инга Петровна
}
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19.

Phase transitions in the (Cs1-xRbx)(2)Znl(4) system / A. A. Sukhovskii [et al.] // Phys. Solid State. - 1999. - Vol. 41, Is. 1. - P. 128-131, DOI 10.1134/1.1131082. - Cited References: 8 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CS2ZNI4
Аннотация: (Cs1-xRbx) 2ZnI4 crystals were grown by two different methods with Rb concentrations varying from x=0 to 2.5%. I-127 NQR and calorimetric measurements showed that crystals grown by the Bridgman technique contain residual impurities (similar to 0.5%) for all x. While x=0 crystals grown from solution do not contain detectable impurities, they allow incorporation only of a low Rb concentration, not above 0.5%. A transition-temperature-concentration (x) phase diagram has been constructed for Bridgman-grown crystals from NQR data. Rb doping shifts the normal-incommensurate and incommensurate-ferroelastic phase-transition points toward higher temperatures with different rates. The P2(1)/m↔P1 first-order transition shifts toward lower temperatures. The region of low Rb concentrations lies closest to the critical point. (C) 1999 American Institute of Physics. [S1063-7834(99)03001-4].

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Держатели документа:
Russian Acad Sci, AV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Univ Saragossa, Saragossa 50009, Spain
ИФ СО РАН

Доп.точки доступа:
Sukhovskii, A. A.; Суховский, Андрей Андреевич; Lisin, V. V.; Aleksandrova, I. P.; Александрова, Инга Петровна; Voronov, V. N.; Воронов, Владимир Николаевич; Melero, J. J.
}
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20.

NMR DETERMINATION OF THE SOLITON DENSITY IN INCOMMENSURATE SYSTEMS / R. . BLINC [et al.] // JOURNAL OF PHYSICS C-SOLID STATE PHYSICS. - 1986. - Vol. 19, Is. 18. - P. 3421-3432, DOI 10.1088/0022-3719/19/18/014. - Cited References: 34 . - ISSN 0022-3719

РУБ Physics, Condensed Matter

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Scopus
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
NUCL RES CTR DEMOKRITOS,ATHENS,GREECE
ИФ СО РАН
Department of Physics, J Stefan Institute, E Kardelj University of Ljubljana, Ljubljana, Slovenia
L V Kirenski Institute of Physics, Krasnoyarsk, Russian Federation
Nuclear Research Centre, Demokritos, Athens, Greece
Доп.точки доступа:
BLINC, R.; RUTAR, V.; TOPIC, B.; ZUMER, S.; SELIGER, J.; ALEKSANDROVA, I. P.; Александрова, Инга Петровна; MILIA, F.
}
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