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Zobov, V. E.
Dynamics in the systems with the 3-spin coupling induced by the strong radiofrequency field / V. E. Zobov, M. A. POPOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1993. - Vol. 103, Is. 6. - P. 2129-2141. - Cited References: 24 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
RESONANCE
LINE
Аннотация: The dynamics of the crystal nucleus spin system in constant and continuous strong radiofrequency magnetic fields is studied. The variation of the relaxation properties of the magnetization perpendicular to the effective field is studied with changing the field orientation in the rotating frame of coordinates and with changing the relation in the mean hamiltonian of two- and three-spin dipole-dipole couplings. The third and fourth moments of the NMR spectrum in the rotating frame of coordinates and the free precession fall are calculated by means of the memory function. The connection between the three-spin coupling and the features of such falls observed in the experiments under magic angle and bias from it is explained.

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Доп.точки доступа:
POPOV, M. A.; Зобов, Владимир Евгеньевич
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    Weak antiferromagnet iron borate FeBO3. classical object for magnetism and the state of the art / S. G. Ovchinnikov, V. V. Rudenko, N. V. Kazak [et al.] // J. Exp. Theor. Phys. - 2020. - Vol. 131, Is. 1. - P. 177-188, DOI 10.1134/S106377612007016X. - Cited References: 74. - This work was supported by the Russian Science Foundation, project no. 18-12-00022 . - ISSN 1063-7761. - ISSN 1090-6509
Рубрики:
ELECTRONIC-STRUCTURE
   TRANSITION
   RESONANCE
   FERROMAGNETISM
   DEPENDENCE
Аннотация: The simple lattice and magnetic structure, the high Neel temperature, the narrow antiferromagnetic resonance line of FeBO3, and the narrow electron paramagnetic resonance line of its isostructural diamagnetic analogs MBO3:Fe3+(M = Ga, In, Sc, Lu) make iron borate unique for investigations and applications. Iron borate is a model crystal for numerous experimental and theoretical studies, including spin crossovers and metallization at megabar pressures and many-electron effects in optics and X-ray spectroscopy. The recent works dealing with the investigation of the properties of FeBO(3)are reviewed.

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Публикация на русском языке Слабый ферромагнетик борат железа FeBO3. Классический объект для магнетизма и современное состояние исследований [Текст] / С. Г. Овчинников, В. В. Руденко, Н. В. Казак [и др.] // Журн. эксперим. и теор. физ. - 2020. - Т. 158 Вып. 1. - С. 184-197

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Kazak, N. V.; Казак, Наталья Валерьевна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Russian Science FoundationRussian Science Foundation (RSF) [18-12-00022]
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VOROTINOV, A. M.
SPIN-GLASS STATE IN AMORPHOUS BI2CUO4 / A. M. VOROTINOV, K. A. SABLINA // Solid State Commun. - 1993. - Vol. 87, Is. 3. - P. 209-211, DOI 10.1016/0038-1098(93)90477-5. - Cited References: 6 . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
RESONANCE
Аннотация: The magnetic susceptibility and magnetic resonance measurements of an amorphous compound Bi2CuO4 have been carried out. It was pointed out, that a part of Cu2+ ions stays in the paramagnetic state down to T=4,2 K. The magnitude of the effective exchange integral in amorphous Bi2CuO4 has been estimated. The magnetic resonance measurements revealed the existance of the magnetic phase transition to spin-glass state at T=100 K.

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

Доп.точки доступа:
SABLINA, K. A.; Саблина, Клара Александровна
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Unusual magnetic phase transitions in Gd3+ clusters in multicomponent oxide glasses / J. . Kliava [et al.] // J. Supercond. Nov. Magn. - 2007. - Vol. 20, Is. 2. - P. 149-153, DOI 10.1007/s10948-006-0116-4. - Cited References: 7 . - ISSN 1557-1939

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
GADOLINIUM
RESONANCE
Кл.слова (ненормированные):
oxide glasses -- gadolinium -- magnetic clusters -- superparamagnetism -- Gadolinium -- Magnetic clusters -- Oxide glasses -- Superparamagnetism -- Magnetic clusters -- Magnetic phase transitions -- Oxide glasses -- Weiss constant -- Antiferromagnetic materials -- Ferromagnetic materials -- Gadolinium -- Magnetic anisotropy -- Magnetic susceptibility -- Paramagnetic resonance -- Phase transitions -- Positive ions -- Superparamagnetism -- Glass
Аннотация: Magnetic susceptibility, EPR and optical properties have been studied in a glass system {20La(2)O(3) - 22Al(2)O(3) - 23B(2)O(3) - 35(SiO2 + GeO2)} with a part of La2O3 substituted by Gd2O3 in different concentrations. Positive Weiss constants have been found in more heavily doped glasses; two magnetic transitions at 55 and 12 K have been detected and ascribed, respectively, to ferromagnetic and antiferromagnetic clusters of Gd3+ ions. The EPR spectra confirm the clustering at higher Gd contents. At low temperatures the cluster-related resonance indicates an onset of magnetic anisotropy. The clustering, depending on the Gd concentration, correlates with a shift to lower energies of the strong optical absorption band edge.

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Держатели документа:
Univ Bordeaux 1, Cours Liberat 351, CP MOH, UMR 5798, F-33405 Talence, France
RAS, SB, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel
SV Vavilov State Opt Inst, St Petersburg 199034, Russia
ИФ СО РАН
CPMOH, UMR 5798 CNRS-Universite Bordeaux-I, 33405 Talence Cedex, France
L.V. Kirensky Institute of Physics, SB, RAS, Krasnoyarsk 660036, Russian Federation
Bar-Ilan University, Department of Physics, Ramat-Gan 52900, Israel
S.V. Vavilov State Optical Institute, St.-Petersburg 199034, Russian Federation
CPMOH, Universite Bordeaux-I, 351 Cours de la Liberation, 33405 Talence Cedex, France

Доп.точки доступа:
Kliava, J.; Malakhovskii, A. V.; Малаховский, Александр Валентинович; Edelman, I. S.; Эдельман, Ирина Самсоновна; Potseluyko, A. M.; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Bruckental, I.; Yeshurun, Y.; Zarubina, T.
}
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Superparamagnetism of magnetite particles in C-60 fullerite powder / E. A. Petrakovskaya [et al.] // Tech. Phys. - 2005. - Vol. 50, Is. 6. - P. 790-793, DOI 10.1134/1.1947359. - Cited References: 9 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
RESONANCE
Аннотация: A new magnetic material, C-60 fullerite powder doped by magnetite (Fe3O4) nanoparticles, is obtained by heating a mixture of fullerite and iron(III) acetylacetonate. It is shown that the material offers superparamagnetic properties. Surface bonding between the nanoparticles and the fullerite is established. (c) 2005 Pleiades Publishing, Inc.

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

Доп.точки доступа:
Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Isakova, V. G.; Исакова, Виктория Гавриловна; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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Size effects and magnetization of (Fe/Si)(n) multilayer film nanostructures / S. N. Varnakov [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 8. - P. 1470-1475, DOI 10.1134/S1063783407080124. - Cited References: 36 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
GIANT MAGNETORESISTANCE
   FE/SI MULTILAYERS
   ULTRAHIGH-VACUUM
   SUPERLATTICES
   EXCHANGE
   RESONANCE
   LAYER
Аннотация: The temperature dependence of the magnetization of (Fe/Si) (n) multilayer films with nanometer layers is investigated. The films are prepared through thermal evaporation under ultrahigh vacuum onto Si(100) and Si(111) single-crystal substrates. It is revealed that the thickness of individual iron layers in (Fe/Si) (n) multilayer films affects the magnetization and its temperature dependence. The inference is made that this dependence is associated with the formation of a chemical interface at the Fe-Si boundaries. The characteristics of the chemical interface in the (Fe/Si) (n) films are estimated.

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Публикация на русском языке Размерные эффекты и намагниченность многослойных пленочных наноструктур (Fe/Si)[n] [Текст] / С. Н. Варнаков [и др.] // Физ. тверд. тела. - 2007. - Т. 49 Вып. 8. - С. 1401-1405

Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Airospace Univ, Krasnoyarsk 660014, Russia
Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Zaragoza 50009, Spain
Univ Zaragoza, Inst Nanociencia Aragon, Zaragoza 50009, Spain
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok Krasnoyarsk 660036, Russian Federation
Siberian Airospace University, pr. im. gazety Krasnoyarskii R. 31, Krasnoyarsk 660014, Russian Federation
Instituto de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
Instituto de Nanociencia de Aragon, Universidad de Zaragoza, Zaragoza 50009, Spain

Доп.точки доступа:
Varnakov, S. N.; Варнаков, Сергей Николаевич; Bartolome, J.; Sese, J.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Parshin, A. S.; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич; Borovik-Romanova, O. \пер.\
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Selective excitation of E-1(LO) and A(1)(LO) phonons with large wave vectors in the Raman spectra of hexagonal InN / V. Y. Davydov [et al.] // Phys. Rev. B. - 2009. - Vol. 80, Is. 8. - Ст. 81204, DOI 10.1103/PhysRevB.80.081204. - Cited References: 15. - We are thankful to B. N. Mavrin and A. N. Vtyurin for the arrangement NIR measurements and S. A. Permogorov for the critical reading of the manuscript. This work was supported by RFBR (Grant No. 09-02-01280), NSC-RFBR (Grant No. 08-02-92003-HHC), and the Program of RAS "New materials and structures." . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SCATTERING
RESONANCE
Кл.слова (ненормированные):
III-V semiconductors -- indium compounds -- phonon dispersion relations -- Raman spectra -- wide band gap semiconductors
Аннотация: It is shown that dispersions of E-1(LO) and A(1)(LO) modes of InN can be restored in a wide interval of wave vectors by studying impurity-induced first-order Raman scattering as a function of exciting light energy. It is also shown that due to the resonance character of scattering the observed phonon energies correspond to the wave vectors strictly defined by exciting photon energies. The frequencies of E-1(LO) and A(1)(LO) phonons at the Gamma point obtained by extrapolation to zero wave vectors were found to be 604 and 592 cm(-1), respectively.

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Держатели документа:
[Davydov, V. Yu.
Klochikhin, A. A.
Smirnov, A. N.
Strashkova, I. Yu.] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[Klochikhin, A. A.] Inst Nucl Phys, St Petersburg 350000, Russia
[Krylov, A. S.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Lu, Hai
Schaff, William J.] Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY 14853 USA
[Lee, H. -M.
Hong, Y. -L.
Gwo, S.] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan
ИФ СО РАН
Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russian Federation
Nuclear Physics Institute, 350000 St. Petersburg, Russian Federation
Kirensky Institute of Physics, 60036 Krasnoyarsk, Russian Federation
Department of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, United States
Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan

Доп.точки доступа:
Davydov, V. Yu.; Klochikhin, A. A.; Smirnov, A. N.; Strashkova, I. Y.; Krylov, A. S.; Крылов, Александр Сергеевич; Lu, H.; Schaff, W. J.; Lee, H. M.; Hong, Y. L.; Gwo, S.; RFBR [09-02-01280]; NSC-RFBR [08-02-92003-HHC]
}
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Rotter, I.
Zeros in single-channel transmission through double quantum dots / I. . Rotter, A. F. Sadreev // Phys. Rev. E. - 2005. - Vol. 71, Is. 4. - Ст. 46204, DOI 10.1103/PhysRevE.71.046204. - Cited References: 28 . - ISSN 1063-651X

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
PHASE EVOLUTION
   RESONANCE
   TRANSPORT
   SYSTEMS
Кл.слова (ненормированные):
Fano interference -- Fano resonances -- Overlapping resonances -- Transmission amplitude -- Channel capacity -- Eigenvalues and eigenfunctions -- Function evaluation -- Hamiltonians -- Mathematical models -- Mathematical operators -- Matrix algebra -- Resonance -- Signal interference -- Semiconductor quantum dots
Аннотация: By using a simple model we consider single-channel transmission through a double quantum dot that consists of two single dots coupled by a wire of finite length L. Each of the two single dots is characterized by a few energy levels only, and the wire is assumed to have only one level whose energy depends on the length L. The transmission is described by using S matrix theory and the effective non-Hermitian Hamilton operator H-eff of the system. The decay widths of the eigenstates of H-eff depend strongly on energy. The model explains the origin of the transmission zeros of the double dot that is considered by us. Mostly, they are caused by (destructive) interferences between neighboring levels and are of first order. When, however, both single dots are identical and their transmission zeros are of first order, those of the double dot are of second order. First-order transmission zeros cause phase jumps of the transmission amplitude by pi, while there are no phase jumps related to second-order transmission zeros. In this latter case, a phase jump occurs due to the fact that the width of one of the states vanishes when crossing the energy of the transmission zero. The parameter dependence of the widths of the resonance states is determined by the spectral properties of the two single dots.

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Держатели документа:
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
Astafev Krasnoyarsk Pedag Univ, Krasnoyarsk 660049, Russia
ИФ СО РАН
Max-Planck-Inst. Phys. Komplexer S., D-01187 Dresden, Germany
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
Dept. of Phys. and Msrmt. Technology, Linkoping University, S-58183 Linkoping, Sweden
Astaf'ev Krasnoyarsk Pedagogical U., Krasnoyarsk, 660049, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович
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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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10.

Ovchinnikov, S. G.
Temperature dependence of the uniaxial magnetic anisotropy of rhombohedral antiferromagnetic crystals with ions in the S state / S. G. Ovchinnikov, V. V. Rudenko, V. I. Tugarinov // Phys. Solid State. - 2010. - Vol. 52, Is. 1. - P. 112-116, DOI 10.1134/S1063783410010191. - Cited References: 19 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ALPHA-FE2O3
   RESONANCE
   FIELD
   MNF2
Аннотация: The contributions of the anisotropic exchange to the firstand second-order uniaxial anisotropy constants have been calculated for hematite at T = 0 K and arbitrary temperatures. The results of the calculations and the most significant mechanisms are taken into account in interpreting the temperature dependence of the anisotropy in rhombohedral antiferromagnetic crystals. The first-order anisotropy constant for hematite is described by the dipole interaction, contributions of the "single-ion" nature, and relatively small contributions of the anisotropic exchange. The second-order constant for hematite includes the "single-ion" contribution and the contribution of the anisotropic exchange. For FeBO(3) and MnCO(3) crystals, the main contributions to the first-order anisotropy constant come from the dipole and single-ion mechanisms.

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Публикация на русском языке Овчинников, Сергей Геннадьевич. Температурная зависимость одноосной магнитной анизотропии ромбоэдрических антиферромагнитных кристаллов с ионами в S-состоянии [Текст] / С. Г. Овчинников, В. В. Руденко, В. И. Тугаринов // Физ. тверд. тела. - 2010. - Т. 52 Вып. 1. - С. 106-109

Держатели документа:
[Ovchinnikov, S. G.
Rudenko, V. V.
Tugarinov, V. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Rudenko, V. V.; Руденко, Валерий Васильевич; Tugarinov, V. I.; Тугаринов, Василий Иванович; Овчинников, Сергей Геннадьевич
}
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