Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=antiferromagnet<.>)

Общее количество найденных документов : 75
Показаны документы с 1 по 20

Petrakovskii, G. A.
Spin-wave spectrum and thermodynamic properties of antiferromagnet with diamagnetic dilution and fluctuating exchange interactions / G. A. Petrakovskii, E. V. Kuzmin, S. S. Aplesnin // Fiz. Tverd. Tela. - 1984. - Vol. 26, Is. 3. - P. 765-772. - Cited References: 17 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Kuzmin, E. V.; Кузьмин, Евгений Всеволодович; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Петраковский, Герман Антонович
}
Найти похожие

Aplesnin, S. S.
Dimerization of antiferromagnetic chain with 4-spin interaction / S. S. Aplesnin // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 6. - P. 1868-1877. - Cited References: 30 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
SPIN-1/2 HEISENBERG-ANTIFERROMAGNET
   COMPETING INTERACTIONS
   MONTE-CARLO
   THERMODYNAMIC PROPERTIES
   SYSTEMS
   CUGEO3
   TEMPERATURE
   NEUTRON
   STATE
   MODEL

WOS
}
Найти похожие

APLESNIN, S. S.
MAGNETIC-PROPERTIES OF A UNIAXIAL ANISOTROPIC ANTIFERROMAGNET WITH TRIANGULAR LATTICE / S. S. APLESNIN // Fiz. Tverd. Tela. - 1989. - Vol. 31, Is. 10. - P. 83-91. - Cited References: 12 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
}
Найти похожие

New intermediate phase in the spiral antiferromagnet cscucl3 induced by a strong magnetic-field / N. V. Fedoseeva, R. S. Gekht, T. A. Velikanova, A. D. Balaev // JETP Letters. - 1985. - Vol. 41, Is. 8. - P. 406-410. - Cited References: 5 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary

WOS
Доп.точки доступа:
Fedoseeva, N. V.; Gekht, R. S.; Velikanova, T. A.; Balaev, A. D.; Балаев, Александр Дмитриевич
}
Найти похожие

Rudenko, V. V.
Magnetic anisotropy of a manganese carbonate antiferromagnet / V. V. Rudenko // Russ. Phys. J. - 2009. - Vol. 52, Is. 9. - P. 990-991. - Cited References: 9 . - ISSN 1064-8887

РУБ Physics, Multidisciplinary
Рубрики:
S-IONS
Кл.слова (ненормированные):
magnetic anisotropy -- crystalline field -- electron paramagnetic resonance

WOS,
Читать в сети ИФ
Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Руденко, Валерий Васильевич
}
Найти похожие

Bifurcations of coupled electron-phonon modes in an antiferromagnet subjected to a magnetic field / K. N. Boldyrev [et al.] // Phys. Rev. Lett. - 2017. - Vol. 118, Is. 16. - Ст. 167203, DOI 10.1103/PhysRevLett.118.167203. - Cited References: 26. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-3577.2017.2, K. N. B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beam line NSLS-BNL, T. N. S. and A. A. S.). The National Synchrotron Light Source is operated as a user facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (Contract No. 26211). M. N. P. thanks B. Z. Malkin and A. V. Popov for helpful discussions. . - ISSN 0031-9007
Кл.слова (ненормированные):
Antiferromagnetic materials -- Bifurcation (mathematics) -- Electron-phonon interactions -- Electrons -- Magnetic fields -- Magnetism -- Temperature -- Antiferromagnetic crystals -- Bifurcation points -- Electron phonon couplings -- Electronic excitation -- External magnetic field -- Field independents -- Low temperatures -- Reflection spectra -- Phonons
Аннотация: We report on a new effect caused by the electron-phonon coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registered in the low-temperature far-infrared (terahertz) reflection spectra of an easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext-c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T, and two bifurcation points were observed. We show that the field behavior of the coupled modes can be successfully explained and modeled on the basis of the equation derived in the framework of the theory of coupled electron-phonon modes, with the same field-independent electron-phonon interaction constant |W|=14.8 cm-1. © 2017 American Physical Society.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russian Federation
Department of Physics, New Jersey Institute of Technology, Newark, NJ, United States
High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
Kirenskiy Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Sirenko, A. A.; Kamenskyi, D.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Popova, M. N.
}
Найти похожие

Magnetic ground state of the Ising-like antiferromagnet DyScO3 / L. S. Wu [et al.] // Phys. Rev. B. - 2017. - Vol. 96, Is. 14. - Ст. 144407, DOI 10.1103/PhysRevB.96.144407. - Cited References:37. - We thank J. M. Sheng and Q. Zhang for the help with the neutron data refinement. We would like to thank A. Christianson, I. Zaliznyak, M. Mourigal, Z. T. Wang, and C. Batista for useful discussions. The research at the Spallation Neutron Source (ORNL) is supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy (DOE). Research supported in part by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy. This work was partly supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), Materials Science and Engineering Division. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Physics, Condensed Matter
Рубрики:
THIN-FILMS
   FERROELECTRICITY
   VISUALIZATION
   EXCITATIONS
Аннотация: We report on the low-temperature magnetic properties of the DyScO3 perovskite, which were characterized by means of single crystal and powder neutron scattering, and by magnetization measurements. Below TN = 3.15 K, Dy3+ moments form an antiferromagnetic structure with an easy axis of magnetization lying in the ab plane. The magnetic moments are inclined at an angle of ∼ +/- 28 degrees to the b axis. We show that the ground-state Kramers doublet of Dy3+ is made up of primarily |+/- 15/2 ⟩ eigenvectors and well separated by a crystal field from the first excited state at E1 = 24.9 meV. This leads to an extreme Ising single-ion anisotropy, M⊥/M∥∼ 0.05. The transverse magnetic fluctuations, which are proportional to M⊥2/M∥2, are suppressed, and only moment fluctuations along the local Ising direction are allowed. We also found that the Dy-Dy dipolar interactions along the crystallographic c axis are two to four times larger than in-plane interactions.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA.
Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany.
Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01069 Dresden, Germany.
Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA.
Fed Res Ctr SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Oak Ridge Natl Lab, Neutron Data Anal & Visualizat Div, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.

Доп.точки доступа:
Wu, L. S.; Nikitin, S. E.; Frontzek, M.; Kolesnikov, A. I.; Ehlers, G.; Lumsden, M. D.; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Guo, E. -J.; Savici, A. T.; Gai, Z.; Sefat, A. S.; Podlesnyak, A.; Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy (DOE); Laboratory Directed Research and Development Program of Oak Ridge National Laboratory; U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), Materials Science and Engineering Division
}
Найти похожие

Transversal Zeeman effect in NdFe3(BO3)4 antiferromagnet / S. L. Gnatchenko [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P6.13. - P. 321. - References: 1 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
Kramers doublet -- splitting -- effective field

Доп.точки доступа:
Gnatchenko, S. L.; Гнатченко С. Л.; Kashur, I. S.; Кашур И. С.; Kurnosov, V. S.; Курносов В. С.; Piryatinskaya, V. G.; Пирятинская В. Г.; Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gudim, I. A.; Гудим, Ирина Анатольевна; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

Нет сведений об экземплярах }
Найти похожие

Lattice and magnetic dynamics of a quasi-one-dimensional chain antiferromagnet PbFeBO4 / M. A. Prosnikov [et al.] // J. Phys.: Condens. Matter. - 2017. - Vol. 29, Is. 2. - Ст. 025808, DOI 10.1088/0953-8984/29/2/025808. - Cited References:32. - This research was supported by the Russian Science Foundation, grant No. 16-12-10456. . - ISSN 0953-8984. - ISSN 1361-648X

РУБ Physics, Condensed Matter
Рубрики:
LIGHT-SCATTERING
DIELECTRIC-PROPERTIES
RAMAN-SPECTROSCOPY
Кл.слова (ненормированные):
Raman scattering -- spin and phonon excitations -- spin-phonon interaction -- antiferromagnetism -- magnetic symmetry analysis -- two-magnon scattering
Аннотация: A group of recently synthesized orthorhombic Pnma crystals PbMBO4 (M = Cr, Mn, Fe) demonstrates a number of unusual structural and magnetic properties. We report on polarized Raman scattering study of the lattice and magnetic dynamics in single crystals of an antiferromagnet PbFeBO4 below and above T-N = 114 K. Polarization properties of the observed magnetic excitations below T-N as well as intense quasi-elastic scattering support the quasi-one-dimensional character of the magnetic structure of PbFeBO4. Frequency overlapping of magnetic excitations and low-frequency phonons in the range of 90-200 cm-1 leads to pronounced asymmetric anomalies thus confirming intrinsic coupling of magnetic and lattice subsystems. This conclusion is also supported by observation of anomalous temperature behaviour of higher frequency phonons in the vicinity of T-N. Experimental investigations are supported by relevant magnetic symmetry analysis which allows us to explain previously observed anomalous results.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia.
SB Russian Acad Sci, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Prosnikov, M. A.; Smirnov, A. N.; Davydov, V. Yu; Sablina, K. A.; Саблина, Клара Александровна; Pisarev, R. V.; Russian Science Foundation [16-12-10456]
}
Найти похожие

10.

Magnetoelastic coupling in the triangular lattice antiferromagnet CuCrS2 / JCE Rasch [et al.] // Phys. Rev. B. - 2009. - Vol. 80, Is. 10. - Ст. 104431, DOI 10.1103/PhysRevB.80.104431. - Cited References: 30. - We are grateful for support and allocated beam time at the Institut Laue-Langevin (D1A, IN3),Grenoble, France, the spallation neutron source SINQ (TriCS, DMC) and the SLS-MS beamline, both Paul Scherrer Insitut, Villigen, Switzerland. This work was supported by INTAS Grant No. 06-1000013-9002 of the Russian Academy of Science (RAS), Siberian Branch. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
NEUTRON POWDER DIFFRACTION
   MAGNETIC-STRUCTURE
   STRUCTURAL-PROPERTIES
   PHASE-TRANSITION
   SOLID OXYGEN
   ALPHA-PHASES
   BETA-PHASES
   SELENIDES
   SULFIDES
Аннотация: CuCrS2 is a triangular lattice Heisenberg antiferromagnet with a rhombohedral crystal structure. We report on neutron and synchrotron powder diffraction results which reveal a monoclinic lattice distortion at the magnetic transition and verify a magnetoelastic coupling. CuCrS2 is therefore an interesting material to study the influence of magnetism on the relief of geometrical frustration.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
[Rasch, Julia C. E.
Boehm, Martin
Ritter, Clemens
Mutka, Hannu] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[Rasch, Julia C. E.
Schefer, Juerg
Keller, Lukas] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
[Cervellino, Antonio] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[Abramova, Galina M.] SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Loeffler, Joerg F.] ETH, Dept Mat, Lab Met Phys & Technol, CH-8093 Zurich, Switzerland
ИФ СО РАН
Institut Laue-Langevin, 6 Rue Jules Horowitz, 38042 Grenoble Cedex 9, France
Laboratory for Neutron Scattering, ETH Zurich, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
L.V. Kirensky Institute of Physics, SB, RAS, Krasnoyarsk 660036, Russian Federation
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland

Доп.точки доступа:
Rasch, JCE; Boehm, M.; Ritter, C.; Mutka, H.; Schefer, J.; Keller, L.; Abramova, G. M.; Абрамова, Галина Михайловна; Cervellino, A.; Loffler, J. F.; Russian Academy of Science (RAS), Siberian Branch [06-1000013-9002]
}
Найти похожие

11.

Martynov, S. N.
Phase diagram of the helical structure of a two-subsystem frustrated antiferromagnet / S. N. Martynov // J. Exp. Theor. Phys. - 2009. - Vol. 108, Is. 1. - P. 72-82, DOI 10.1134/S1063776109010105. - Cited References: 25 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
GROUND SPIN-STATE
   PYROCHLORE ANTIFERROMAGNET
   TRIANGULAR-LATTICE
   CLASSICAL-THEORY
   MODEL
   TRANSITION
Кл.слова (ненормированные):
Antiferromagnetic materials -- Antiferromagnetism -- Free energy -- Magnetic devices -- Magnetic fields -- Magnetic structure -- Phase diagrams -- Vectors -- Antiferromagnet -- Antiferromagnetic -- Antiferromagnetic sublattices -- Comparative analysis -- Critical fields -- External fields -- Field boundaries -- First derivatives -- First-order transitions -- Helical orderings -- Helical phase -- Helical structures -- Higher temperatures -- Incommensurate magnetic structures -- Isotropic exchanges -- Magnetic subsystems -- Magnetization jumps -- Mean-field approximations -- Minimum free energies -- Numerical minimizations -- Spatial displacements -- Temperature dependences -- Thermodynamic potentials -- Variational equations -- Wave vectors -- Phase transitions
Аннотация: The expansion of the thermodynamic potential for the two-subsystem antiferromagnet with frustrated intersubsystem isotropic exchange is obtained. It is demonstrated that this expansion contains the first derivatives with respect to the antiferromagnetic vectors of the subsystems, i.e., the Lifshitz invariant. The equation for the temperature-field boundary of the helical phase for the two-subsystem frustrated antiferromagnet is derived by linearizing the variational equations for the minimum free energy within the mean-field approximation. Relationships are obtained for the critical field at T = 0, the angle of canting of moments of the antiferromagnetic sublattices, and the temperature of spontaneous appearance of helical ordering in the absence of an external field. It is revealed that there is a second higher temperature of formation of the helical magnetic structure induced by the magnetic field with the wave vector of the helix nonmonotonically depending on the external field. The phase boundary of the helical phase and the temperature dependence of the orientation of moments of the magnetic subsystem with weak exchange interaction are determined using numerical minimization of the free energy. It is shown that the transition to the commensurate phase is a first-order transition with a small magnetization jump. A comparative analysis of models with different spatial displacements of ions in the subsystems along the direction of the vector of the helical structure is performed. A criterion is proposed for the choice of the direction of the vector of the incommensurate magnetic structure.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Мартынов, Сергей Николаевич
}
Найти похожие

12.

Bondarenko, I. N.
Magnetic transitions in layered triangular antiferromagnets / I. N. Bondarenko, R. S. Gekht, V. I. Ponomarev // Phys. Lett. A. - 1996. - Vol. 222, Is. 4. - P. 269-274, DOI 10.1016/0375-9601(96)00635-4. - Cited References: 22 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
HEISENBERG-ANTIFERROMAGNET
   PHASE-TRANSITION
   VBR2
   SYSTEMS
   FIELD
   VCL2
Кл.слова (ненормированные):
triangular antiferromagnets -- quantum and thermal fluctuations -- successive phase transitions -- Quantum and thermal fluctuations -- Successive phase transitions -- Triangular antiferromagnets
Аннотация: Magnetic states and phase transitions of the layered triangular antiferromagnets in an applied field are studied. It is shown that in compounds like VBr2 and VCl2 quantum effects change the ground state structure and cause successive phase transitions as the magnetic field increases. Coplanar structures of different spin configuration are realized far from the saturation field and a noncoplanar structure of umbrella-type configuration is realized near this field. The ground-state phase diagram is constructed, and a finite region of fields where the collinear phase is also possible is indicated.

WOS,
Scopus
Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Gekht, R. S.; Ponomarev, V. I.
}
Найти похожие

13.

Martynov, S. N.
The incommensurate magnetic structure of a tetragonal antiferromagnet with antisymmetric exchange / S. N. Martynov // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 6. - P. 979-988, DOI 10.1134/S1063776109120097. - Cited References: 34 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
FLUCTUATION-INDUCED PHASE
   FIELD-INDUCED GAP
   COPPER METABORATE
   WEAK FERROMAGNETISM
   SOLITON LATTICE
   SPIN-WAVES
   CUB2O4
   BA2CUGE2O7
   CSCUCL3
   CHAINS
Кл.слова (ненормированные):
Anti-symmetric -- Antiferromagnetic sublattices -- Antiferromagnets -- Antisymmetric exchange -- Exchange bonds -- Ferromagnetic component -- Ferromagnetic moments -- Ginzburg-Landau functional -- Incommensurate magnetic structures -- Mean field approximation -- Modulation vectors -- Polarization planes -- Polarization vectors -- Symmetry groups -- Antiferromagnetic materials -- Antiferromagnetism -- Crystal orientation -- Crystal symmetry -- Ferromagnetic materials -- Ferromagnetism -- Magnetic devices -- Magnetic structure -- Modulation -- Polarization -- Vector spaces -- Vectors -- Crystallography
Аннотация: Analysis of the incommensurate magnetic structure that emerges for two coexisting types of the antisymmetric Dzyaloshinski-Moriya exchange interaction (the weakly ferromagnetic component of vector D along the tetragonal axis and the helicoidal component distributed in the tetragonal plane) is carried out for the first time for a tetragonal antiferromagnet. The helicoidal component for each pair of interacting spins has a 2D distribution; its direction in the tetragonal plane depends on the direction of the exchange bond in each pair. The Lifshits invariant of the Ginzburg-Landau functional is obtained, which is responsible for the formation of an incommensurate magnetic structure for such a distribution. It is shown in the mean field approximation that the incommensurate magnetic structure that forms in this case is a nonlinear double helicoid with a modulation vector lying in the tetragonal plane and with a varying angle between the polarization planes of quasi-antiferromagnetic sublattices. The ground state of the magnet is degenerate in the orientation of the modulation vector in the tetragonal plane. The rate of variation in the orientations of moments in the polarization planes passing through the tetragonal axis is controlled by the angle between the directions of the moments and the tetragonal axis. The local weakly ferromagnetic moment remaining in the polarization plane varies in magnitude and sign. The relation between the orientations of the modulation and polarization vectors is derived for the cases of simple and inversion tetragonal axes in the space symmetry group of the crystal.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Мартынов, Сергей Николаевич
}
Найти похожие

14.

Aplesnin, S. S.
The study of magnetic properties of the quasi-one-dimensianal spin-1/2 antiferromagnet by Monte-Carlo method / S. S. Aplesnin // Phys. Low-Dimens. Struct. - 2000. - Vol. 07.08.2013. - P. 37-46. - Cited References: 15 . - ISSN 0204-3467

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
ONE-DIMENSIONAL ANTIFERROMAGNETS
   SYSTEMS
   CHAINS
   CA2CUO3
Аннотация: The thermodynamic quantities, two- and four-spin correlation functions as well as the correlation radius for weakly coupled antiferromagnetic spin chains with S = 1/2 are calculated using the mean-field approximation for the interchain coupling (J(2)) for longitudinal and transverse spin components by quantum Monte Carlo method. Results for the staggered magnetization and Neel temperature are in agreement with general scaling arguments. The value of triplet DeltaS(z) =1 gp in the spectrum of excitations is estimated. The transverse staggered field was found to induce an additional maximum in the correlation radius of the four spin correlation function around T/J(1) approximate to [0.05 divided by 0.075), J(2)/J(1) 0.03.

WOS
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Аплеснин, Сергей Степанович
}
Найти похожие

15.

MAGNETIC-BEHAVIOR OF QUASIONE-DIMENSIONAL CSMNBR3 WITH TRIANGULAR SPIN-LATTICE / G. A. PETRAKOVSKII [и др.] // Fiz. Tverd. Tela. - 1993. - Vol. 35, Is. 4. - P. 965-973. - Cited References: 13 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
ANTIFERROMAGNET

WOS

Доп.точки доступа:
PETRAKOVSKII, G. A.; APLESNIN, S. S.; PETROV, S. V.; FEDOSEEVA, N. V.
}
Найти похожие

16.

Aplesnin, S. S.
New magnetic structural types in a stochastic easy-plane hexagonal-lattice antiferromagnet / S. S. Aplesnin // Zhurnal Eksperimentalnoi Teor. Fiz. - 1991. - Vol. 100, Is. 6. - P. 2068-2073. - Cited References: 8 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary

Аннотация: By means of the numerical simulation new magnetic states, such as a domain structure antiferromagnet having the periodic and nonperiodic solutions in the spin transverse components and two spin-glass states in the chiral and spin order parameters, are found in a stochastic antiferromagnet with the competing couplings and easy-plane anisotropy. Two temperature transitions caused by the chiral and spin symmetry breaking and the magnetic field regions with the induced long-range chiral order are calculated.

WOS

Доп.точки доступа:
Аплеснин, Сергей Степанович
}
Найти похожие

17.

Ovchinnikov, S. G.
Quasiparticles in strongly correlated electronic systems in cuprate oxides / S. G. Ovchinnikov // Uspekhi Fiz. Nauk. - 1997. - Vol. 167, Is. 10. - P. 1043-1068. - Cited References: 227 . - ISSN 0042-1294

РУБ Physics, Multidisciplinary
Рубрики:
T-J-MODEL
   HIGH-TEMPERATURE SUPERCONDUCTORS
   DIMENSIONAL HUBBARD-MODEL
   QUASI-PARTICLE DISPERSION
   HEISENBERG-ANTIFERROMAGNET SR2CUO2CL2
   ANGLE-RESOLVED PHOTOEMISSION
   CHARGE FLUCTUATION REGIME
   SADDLE-POINT SINGULARITY
   SINGLET-TRIPLET MODEL
   LA-SR-CU
Аннотация: New experimental and theoretical results on the electronic structure and spectral properties of quasiparticles in cuprate oxides are reviewed. It is shown that the electronic structure transforms from antiferromagnetic insulators to optimally doped high-temperature superconductors as the doping level is varied. The experimental methods considered are primarily angular resolved photoelectron spectroscopy (ARPES), neutron scattering, and NMR. Two types of electronic structure calculations for data interpretation purposes are considered, namely, exact numerical methods for finite clusters (exact diagonalisation and the quantum Monte Carlo method) and approximate schemes for the infinite lattice. As a result, a coherent unified picture emerges, in which the magnetic polaron of a weakly doped antiferromagnetic lattice transforms into a system of Fermi particles dressed by short-range antiferromagnetic type spin fluctuations. In the region of weakly doped metal compositions, deviations from Fermi-liquid properties are seen, such as the failure of Luttinger's theorem, shadowy photoemission bands, and the spin pseudogap effect in spectral and thermodynamic measurements. The situation in the neighbourhood of the insulator-metal concentration transition is described as least understood.

WOS

Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
Найти похожие

18.

Aplesnin, S. S.
Quantum spin liquid in the frustrated anisotropic Heisenberg antiferromagnet on a square lattice / S. S. Aplesnin // Phys. Low-Dimens. Struct. - 1997. - Vol. 10. - P. 95-102. - Cited References: 13 . - ISSN 0204-3467

РУБ Physics, Applied + Physics, Condensed Matter

Аннотация: Finite-temperature properties of the frustrated S = 1/2 Heisenberg model with the next-nearest-neighbor exchange (J(2) 0) and anisotropic exchange (Delta

WOS

Доп.точки доступа:
Аплеснин, Сергей Степанович
}
Найти похожие

19.

Ferromagnet-antiferromagnet transition in layered perovskites of Sr3YCo4O10.5 type / I. O. Troyanchuk [et al.] // Mater. Res. Express. - 2019. - Vol. 6, Is. 2. - Ст. 026105, DOI 10.1088/2053-1591/aaef21. - Cited References: 30. - This work was supported by the Belarussian Foundation for Basic Research (project F18R-159) and Russian Foundation Basic Research (contract no. 18-52-00020). Yu S Orlov and SG Ovchinnikov are grateful Russian Foundation Basic Research (contracts no. 18-52-00017 Bel_a, 16-02-00507) and Council on grants of the President of the Russian Federation (SP-1844.2016.1) for the support. . - ISSN 2053-1591

РУБ Materials Science, Multidisciplinary
Рубрики:
SPIN
NANOWIRES
Кл.слова (ненормированные):
neutron diffraction -- orbital ordering -- spin state
Аннотация: Sr1−xYxCoO2.65 (x = 0.2) with layered perovskite structure was studied by neutron diffraction, synchrotron x-ray and magnetometry methods. It is shown that in the 90–375 K temperature range the crystal structure can be described by the monoclinic space group A2/m with the superstructure 4√2a p × 2√2a p × 4a p (with a p corresponding to the unit cell parameter of the primitive cell) while basic diffraction peaks are well indexed in the space group I4/mmm (2a p × 2a p × 4a p ) shows an almost standard magnetization. The basic magnetic structure is G-type antiferromagnetic with average magnetic moments of 2.7 μ B/Co and 1.7 μ B/Co in anion-deficient CoO4+γ and stoichiometric CoO6 layers, respectively. A ferromagnetic component of about 0.27 μ B/Co is determined from the magnetization measurements at 8 K. Sr0.8Y0.2CoO2.65 shows an almost standard magnetization versus temperature dependence whereas Sr0.75Y0.25CoO2.65 exhibits an antiferromagnet-ferromagnet transition accompanied by a structural transformation. There is practically no spontaneous magnetization in x = 0.3. The type of the magnetic structure and the high value of TN suggest that the Co3+ ions are in both structural layers predominantly in the low-spin (LS)/high-spin (HS) state mixture. It is proposed that the ferromagnetic component is due to the orbital ordering occurring at TN in the CoO5 pyramids and the concomitant appearance of ferromagnetic coupling between the Co3+(HS) ions located in these CoO5 pyramids in the anion-deficient CoO4+γ layer.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Natl Acad Sci Belarus Mat Sci, Sci & Pract Ctr, Minsk, BELARUS.
Joint Inst Nucl Res, Dubna, Russia.
Inst Laue Langevin, Grenoble, France.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk 660074, Russia.

Доп.точки доступа:
Troyanchuk, I. O.; Bushinsky, M. V.; Tereshko, N. V.; Lanovsky, R. A.; Sikolenko, V. V.; Ritter, C.; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Belarussian Foundation for Basic Research [F18R-159]; Russian Foundation Basic Research [18-52-00017 Bel_a, 16-02-00507, 18-52-00020]; Council on grants of the President of the Russian Federation [SP-1844.2016.1]
}
Найти похожие

20.

Magnetoelastic coupling in triangular lattice antiferromagnet CuCrS2 / J. C.E. Rasch, M. Boehm [et al.] // arXiv. - 2009. - Ст. cond-mat/0907.4850. - P1-6. - Библиогр.: 30
Аннотация: CuCrS2 is a triangular lattice Heisenberg antiferromagnet with a rhombohedral crystal structure. We report on neutron and synchrotron powder diffraction results which reveal a monoclinic lattice distortion at the magnetic transition and verify a magnetoelastic coupling. CuCrS2 is therefore an interesting material to study the influence of magnetism on the relief of geometrical frustration.

Смотреть статью,
Читать в сети ИФ
Держатели документа:
Institut Laue-Langevin, 6 Rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France
Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut, CH-5232 Villigen, PSI, Switzerland
L.V. Kirensky Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, PSI, Switzerland
Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland

Доп.точки доступа:
Rasch, J.C.E.; Boehm, M.; Ritter, C.; Mutka, H.; Schefer, J.; Keller, L.; Abramova, G. M.; Абрамова, Галина Михайловна; Cervellino, A.; Leoffler, J.F.
}
Найти похожие