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1.
Anomalies in the
magnetic properties of bismuth-substituted diluted yttrium iron garnet / S. S.
Aplesnin
, F. V. Zelenov, S. V. Semenov, O. A. Bayukov> // J. Magn. Magn. Mater. - 2023. -
Vol. 582
. - Ст. 171030,
DOI
10.1016/j.jmmm.2023.171030. - Cited References: 61. - The authors are grateful to T. N. Tarasenko for providing samples for magnetic measurements . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Magnetic properties
--
Compensation temperature
--
Mossbauer spectroscopy
Аннотация:
The magnetic properties and Mossbauer spectra of the Y1.8Bi1.2Fe3.5Ga1.5O12 compound were investigated. A linear temperature dependence of the saturation magnetization, hysteresis, and stability of the coercive field in the magnetically ordered state were found. Using the Mossbauer measurements, the distribution of iron ions over octahedral and tetrahedral sites and the concentration of paramagnetic iron ions were determined. Two critical temperatures – the sublattice magnetization compensation temperature and the ferrimagnet–paramagnet transition temperature – were established. The disappear of the phonon mode in the vicinity of the magnetic transition was observed. The experimental data have been interpreted in terms of the spin–lattice interaction model.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk 660036, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsky Rabochy Av., 31, Krasnoyarsk 660014, Krasnoyarsk, Russia
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Aplesnin
, S. S.; Аплеснин, Сергей Степанович; Zelenov, F. V.; Semenov, S. V.; Семёнов, Сергей Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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2.
Aplesnin
, S. S.
A study of anisotropic Heisenberg antiferromagnet with S=1/2 on a square lattice by Monte-Carlo method / S. S.
Aplesnin
> // Phys. Status Solidi B. - 1998. -
Vol. 207
,
Is. 2
. - P. 491-498,
DOI
10.1002/(SICI)1521-3951(199806)207:2491::AID-PSSB4913.0.CO;2-G. - Cited References: 24 . - ISSN 0370-1972
РУБ
Physics, Condensed Matter
Рубрики:
EU2CUO4
LA2CUO4
ORDER
MODEL
STATE
Аннотация:
The two-dimensional (2D) Heisenberg model (J 0) with anisotropic exchange Delta = 1-J(X)/J(Z) greater than or equal to 0 and with S = 1/2 is studied by the quantum Monte-Carlo method. Energy, susceptibility, specific heat, spin-spin correlation functions, and correlation radius are calculated. The dependence of the Neel temperature T(N)/J = 2/ln(11/Delta) on the exchange anisotropy is determined. The static magnetic factor is very slowly decreased for T/J 0.4. It is assumed to realize topological excitations in the range of these temperatures. The correlation radius of the isotropic Heisenberg model is fitted by the dependence 1/xi = 2.05T(1.0(6))/exp (1.0(4)/T).The temperature behavior of the static structural magnetic factor in La(2)CuO(4) and Er(2)CuO(4) for T T(N) is in agreement with the MC calculations.
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Держатели документа:
LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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3.
Aplesnin
, S. S.
Anomalies in magnetoresistance and in the bulk modulus for ferromagnetics with four-spin exchange interaction on the Kondo lattice / S. S.
Aplesnin
, N. I. Piskunova> // J. Phys.: Condens. Matter. - 2006. -
Vol. 18
,
Is. 29
. - P. 6859-6868,
DOI
10.1088/0953-8984/18/29/023. - Cited References: 29 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
MIXED-VALENCE MANGANITES
PHASE-SEPARATION
LA1-XSRXMNO3
BEHAVIOR
PECULIARITIES
TRANSITION
Кл.слова (ненормированные):
Elastic moduli
--
Electric resistance
--
Ferromagnetism
--
Function evaluation
--
Paramagnetism
--
Transceivers
--
Adiabatic approximation
--
Kondo lattice
--
Paramagnetic state
--
Ring exchange
--
Magnetoresistance
Аннотация:
The temperature dependence of resistivity and the bulk modulus are calculated on the Kondo lattice, with ring exchange between localized spins, using the spin-polaron and adiabatic approximation. Peak and zero values of the bulk modulus as functions of temperature and concentration are determined below the temperature of the transition to the paramagnetic state. The effects of the nearest order between transverse spin components and a value of the ring exchange between localized spins on magnetoresistivity are estimated.
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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
L v Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk, 660014, Russian Federation
Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
}
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4.
Aplesnin
, S. S.
Anomalies in transport properties in a magnetically ordered region on a Kondo lattice / S. S.
Aplesnin
> // JETP Letters. - 2005. -
Vol. 81
,
Is. 2
. - P. 66-71,
DOI
10.1134/1.1887917. - Cited References: 33 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
DOUBLE EXCHANGE MODEL
PHASE-SEPARATION
MANGANITES
LA1-XSRXMNO3
SYSTEMS
SHIFT
EDGE
Аннотация:
The temperature dependences of resistivity and thermal emf on a Kondo lattice are calculated using the spinpolaron approximation. The peaks and sign reversal points of thermal emf as a function of temperature and concentration below the temperature of the transition to the paramagnetic state are determined. The concentration region containing the metal-insulator transition below the Curie temperature and the shift of the upper spin-polaron band are calculated. (c) 2005 Pleiades Publishing, Inc.
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Публикация на русском языке
Аплеснин, Сергей Степанович. Аномалии транспортных свойств в магнитоупорядоченной области на кондо-решетке [Текст] / С. С. Аплеснин // Письма в журн. эксперим. и техн. физ. - 2005. - Т. 81 Вып. 2. - С. 74-79
Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian State Aerosp Acad, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian State Aerospace Academy, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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5.
Aplesnin
, S. S.
Change in the magnetocapacity in the paramagnetic region in a cation-substituted manganese selenide / S. S.
Aplesnin
, M. N. Sitnikov, A. M. Zhivul'ko> // Phys. Solid State. - 2018. -
Vol. 60
,
Is. 4
. - P. 673-680,
DOI
10.1134/S1063783418040029. - Cited References:19. - This work is supported by the Russian Foundation for Basic Research (project no. 17-32-50080), grant no. 16-52-00045 Bel_a, and state task no. 3.5743.2017/6.7. . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
MULTIFERROICS
Аннотация:
The capacity and the dielectric loss tangent of a Gd x Mn1–xSe (x ≤ 0.2) solid solution have been measured in the frequency range 1–300 kHz without a magnetic field and in a magnetic field of 8 kOe in the temperature range 100–450 K, and the magnetic moment of the solid solution has been measured in a field of 8.6 kOe. The magnetocapacity effect and the change in the magnetocapacity sign have been observed in room temperature in the paramagnetic region. A correlation of the changes in the dielectric permittivity and the magnetic susceptibility with temperature has been revealed. The magnetocapacity is described using the model with orbital electron ordering and the Maxwell–Wagner model.
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Публикация на русском языке
Аплеснин, Сергей Степанович. Смена знака магнитоемкости в парамагнитной области в катион-замещенном селениде марганца [Текст] / С. С. Аплеснин, М. Н. Ситников, А. М. Живулько // Физ. тверд. тела. - 2018. - Т. 60 Вып. 4. - С. 670-676
Держатели документа:
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Natl Acad Sci Belarus, Sci Pract Mat Res Ctr, Minsk 220072, Byelarus.
Доп.точки доступа:
Sitnikov, M. N.; Zhivul'ko, A. M.; Аплеснин, Сергей Степанович; Russian Foundation for Basic Research [17-32-50080, 16-52-00045 Bel_a, 3.5743.2017/6.7]
}
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6.
Aplesnin
, S. S.
Conductivity of HoxMn1-xS magnetic semiconductors with orbital ordering / S. S.
Aplesnin
, M. N. Sitnikov> //
Int. conf. "Spin physics, spin chem., and spin technol.". - 2015. - P. 47
Материалы конференции
Доп.точки доступа:
Sitnikov, M. N.; Аплеснин, Сергей Степанович; "Spin physics, spin chemistry, and spin technology", Internnational conference(2015 ; jun. ; 1-5 ; Saint Peterburg); Физико-технический институт им. А.Ф. Иоффе РАНКазанский физико-технический институт им. Е. К. Завойского Казанского научного центра РАН; "Инно-мир", центр межрегионального инновационного развития
}
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7.
APLESNIN
, S. S.
CRITICAL-BEHAVIOR OF DILUTED ISING MAGNETS WITH ANISOTROPIC EXCHANGE INTERACTION DISTRIBUTION / S. S.
APLESNIN
> // Fiz. Tverd. Tela. - 1984. -
Vol. 26
,
Is. 11
. - P. 3355-3361. - Cited References: 19 . - ISSN 0367-3294
РУБ
Physics, Condensed Matter
WOS
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8.
Aplesnin
, S. S.
Dimer state in the two-dimensional anisotropic alternated-exchange Heisenberg model / S. S.
Aplesnin
> // Phys. Solid State. - 1998. -
Vol. 40
,
Is. 6
. - P. 986-990,
DOI
10.1134/1.1130463. - Cited References: 14 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
SPIN-PEIERLS
HUBBARD-MODEL
SUPERCONDUCTIVITY
ANTIFERROMAGNETS
Аннотация:
An analysis is made of the two-dimensional Heisenberg model with S = 1/2, anisotropic exchange interaction between nearest neighbors, and alternating exchange in two directions, [100] and [010] (corresponding to condensation of the (pi,pi) mode) and in one direction [100] (corresponding to condensation of the (pi,0) mode), The quantum Monte Carlo method is used to calculate the thermodynamic characteristics and the spin correlation functions which are used as the basis to determine the boundary of stability of an anisotropic antiferromagnetic with respect to alternation of exchange delta = (1 - J(x,y) / J(z))(0.4) in the (pi,pi) model and delta = (1 - J(x,y) / J(z))(0.31) in the (pi,0) model. In the (pi,0) model a disordered quantum state exists in the range (1 - J(x,y) / J(z))(0.31) delta (0.3-0.35). The energy (E - 0.68)
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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9.
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
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10.
Aplesnin
, S. S.
Effect of bond fluctuations on the transport properties of manganites and nickelates / S. S.
Aplesnin
> // J. Exp. Theor. Phys. - 2007. -
Vol. 104
,
Is. 5
. - P. 766-774,
DOI
10.1134/S1063776107050111. - Cited References: 26 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
NEUTRON-DIFFRACTION
CHARGE DISPROPORTIONATION
ELECTRONIC-STRUCTURE
MAGNETIC ORDER
TRANSITIONS
PEROVSKITES
PRNIO3
GAP
Кл.слова (ненормированные):
Crystal structure
--
Manganites
--
Optimization
--
Thermal conductivity
--
Thermal effects
--
Bond fluctuations
--
Nickelates
--
Orthorhombic crystal structure
--
Nickel compounds
Аннотация:
For the manganites RMnO(3) (R = La, Pr, Nd), a mechanism is proposed to explain the anomalous temperature dependences of the kinetic coefficients, resistivity, and thermoelectric power during the transition from the pseudocubic O to the orthorhombic O' crystal structure. The contributions of the bending and stretching modes of the octahedron to the formation of thermal-conductivity maxima and to the deviation from the linear dependence of ln(rho/T) on 1/T at low temperatures have been estimated. In nickelates, the metal-insulator transition is caused by lattice-polaron pinning by the stretching mode of the octahedron, and the low-temperature anomaly of the thermal conductivity is related to electron scattering by the bending mode of the octahedron.
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Публикация на русском языке
Аплеснин, Сергей Степанович. Роль флуктуации связей на транспортные свойства в магнганитах и никелатах [Текст] / С. С. Аплеснин // Журн. эксперим. и теор. физ. - 2007. - Т. 131 № 5. - С. 878-888
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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11.
Aplesnin
, S. S.
Electronic transition, ferroelectric and thermoelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 / S. S.
Aplesnin
, L. V. Udod, M. N. Sitnikov> // Ceram. Int. - 2018. -
Vol. 44
,
Is. 2
. - P. 1614-1620,
DOI
10.1016/j.ceramint.2017.10.082. - Cited References: 41. - The authors would like to thank M. Molokeev for the clarification of x-ray spectra. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 16–52-00045 bel_a. . - ISSN 0272-8842
Кл.слова (ненормированные):
Dielectric properties
--
Ferroelectric properties
--
Impedance
--
Thermopower
--
Electrical properties
Аннотация:
The ferroelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 in the high-temperature region are established. The linear thermal expansion coefficient, electrical resistance, impedance, I−V characteristics, capacitance, loss-angle tangent, charge, and thermopower of the investigated material are measured in the temperature range of 300−700 K at frequencies of 102−106 Hz. Anomalies of the thermal expansion coefficient and hodograph spectrum variation in the region of polymorphic phase transitions are observed. The high resistance and change of the hopping conductivity for the tunnel-emission are found. The hysteresis in the electric field dependence of polarization is established. The change in the thermopower sign with temperature is revealed. The obtained experimental data are explained in the framework of the model of migration polarization by charged chromium ions.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University M. F. Reshetnev, Krasnoyarsky Rabochy Av. 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Аплеснин, Сергей Степанович
}
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12.
Aplesnin
, S. S.
Existence of massive singlet excitations in an antiferromagnetic alternating chain with S=1/2 / S. S.
Aplesnin
> // Phys. Rev. B. - 2000. -
Vol. 61
,
Is. 10
. - P. 6780-6784,
DOI
10.1103/PhysRevB.61.6780. - Cited References: 26 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
PEIERLS COMPOUND CUGEO3
SPIN SYSTEMS
TRANSITION
Аннотация:
The one-dimensional Heisenberg model with alternating antiferromagnetic bond and spin-1/2 has been studied by the Monte Carlo method. The thermodynamic characteristics, spin-spin, and four spin-correlation function have been calculated. From several maxima of the correlation radius of the four spin-correlation function and sharp slopes of the dimer order parameter, a longitudinal component of the total spin square as a function of temperature and magnetic field, the existence of two mass singlet excitation branches with Delta S-z=0 and one triplet with Delta S-z=1 is suggested. Critical temperatures and fields related to singlet filled bands have been estimated. From these results low-temperature (TT-SP) properties of spin-Peierls (SP) compounds CuGeO3 and NaV2O5 have been explained.
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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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13.
Aplesnin
, S. S.
Formation of a gapless quantum spin liquid upon orbital ordering in a chain / S. S.
Aplesnin
, N. I. Piskunova> // JETP Letters. - 2007. -
Vol. 85
,
Is. 12
. - P. 644-648,
DOI
10.1134/S0021364007120120. - Cited References: 10 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
MAGNETIZATION PLATEAUS
GAP
Аннотация:
The exchange mechanism of the ordering of electrons on e (g) orbitals has been estimated by the quantum Monte Carlo method with the nclusion of the hopping integrals through an anion in a one-dimensional system. A magnetic state in the form of a gapless quantum spin liquid has been found. The plateau existence region in the field-dependence of the magnetization, as well as the wave vector of the modulation of the magnetic structure with Q = pi/2 in the (magnetic field-exchange alternating) plane, is determined.
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Insitute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
}
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14.
Aplesnin
, S. S.
Formation of a spin density wave in copper metaborate by a spin polaron / S. S.
Aplesnin
> // J. Phys.: Condens. Matter. - 2004. -
Vol. 16
,
Is. 32
. - P. 5907-5914,
DOI
10.1088/0953-8984/16/32/023. - Cited References: 12 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
SOLITON LATTICE
CUB2O4
Кл.слова (ненормированные):
Absorption
--
Correlation methods
--
Electric fields
--
Infrared radiation
--
Magnetization
--
Mathematical models
--
Polarons
--
Specific heat
--
Intraband transition
--
Optical conductivity
--
Spin density waves
--
Spin polaron
--
Copper compounds
Аннотация:
Formation of incommensurate three-dimensional magnetic order below T* similar to 10 K in CuB2O4 is explained on the basis of strong correlation between the holes and localized spins. The Kondo lattice model is analysed for the case where spin polarons are the elementary excitations. The origin of the low-temperature specific heat maximum at T similar to 5 K is associated with a displacement of the polaron band bottom. A set of anomalies in the temperature dependence of the conductivity, shift of the optical conductivity maximum in the range of energies 0.02-0.12 eV and decreasing of the infrared absorption intensity is predicted.
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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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15.
APLESNIN
, S. S.
FORMATION OF FERROMAGNETIC ORDER IN ANISOTROPIC FRUSTRATED ANTIFERROMAGNETS / S. S.
APLESNIN
> // Fiz. Tverd. Tela. - 1992. -
Vol. 34
,
Is. 2
. - P. 554-560. - Cited References: 5 . - ISSN 0367-3294
РУБ
Physics, Condensed Matter
Рубрики:
COMPETING INTERACTIONS
MAGNETIC-PROPERTIES
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16.
Aplesnin
, S. S.
Gigantic magnetocapacitive effect into Yb[[d]]x[[/d]]Mn[[d]]1-x[[/d]]S / S. S.
Aplesnin
, A. A. Khar'kov, V. V. Sokolov> //
V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P33 . - ISBN 978-5-7444-3124-2
Доп.точки доступа:
Khar'kov, A. A.; Харьков, А.А.; Sokolov, V. V.; Аплеснин, Сергей Степанович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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17.
APLESNIN
, S. S.
INCOMMENSURATE AND APERIODIC STRUCTURES IN FRUSTRATED ANTIFERROMAGNETS WITH HCP LATTICES / S. S.
APLESNIN
, R. S. GEKHT> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1989. -
Vol. 96
,
Is. 6
. - P. 2163-2171. - Cited References: 16 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
WOS
Доп.точки доступа:
GEKHT, R. S.
}
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18.
Aplesnin
, S. S.
Influence of quantum fluctuations on the Neel temperature of a dilute two-dimensional anisotropic antiferromagnet / S. S.
Aplesnin
> // Phys. Solid State. - 1997. -
Vol. 39
,
Is. 5
. - P. 800-802,
DOI
10.1134/1.1130121. - Cited References: 15 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
LATTICE
Аннотация:
A quantum Monte Carlo procedure is used to calculate the energy, sublattice magnetization, Neel temperature, and the slopes of the S=[l/T-N(x=0)]dT(N)(x)/dx curves as functions of the hole concentration and the exchange anisotropy Delta=1-J(x,y)/J(z) in the Heisenberg model with anisotropic negative interactions between nearest neighbors in a square lattice with dilution among the lattice sites. The slope diverges in the limit Delta--0:S similar to ln(6.5/Delta). (C) 1997 American Institute of Physics.
WOS
,
Scopus
Держатели документа:
L. V. Kirenskii Inst. of Phys., Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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19.
Aplesnin
, S. S.
Influence of spin-phonon coupling on the magnetic moment in 2D spin-1/2 antiferromagnet / S. S.
Aplesnin
> // Phys. Lett. A. - 2003. -
Vol. 313
,
Is. 1-2
. - P. 122-125,
DOI
10.1016/S0375-9601(03)00689-3. - Cited References: 17 . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
SQUARE LATTICE
EU2CUO4
MODEL
Кл.слова (ненормированные):
2D Heisenberg model
--
spin-phonon interactions
--
2D Heisenberg model
--
Spin-phonon interactions
--
ferromagnetic material
--
anisotropy
--
article
--
liquid
--
magnetism
--
mathematical model
--
Monte Carlo method
--
quantum theory
--
thermal conductivity
--
vibration
Аннотация:
The ground state of two-dimensional Heisenberg spin-1/2 antiferromagnet (AF) with the spin-phonon coupling is studied by the quantum Monte Carlo method. The magnetic moment per site, mean-square vibration of ion, phase diagram of AF long range order-quantum spin. liquid are simulated. The spin-phonon coupling is estimated for R2CuO4, R = Gd, Eu. (C) 2003 Elsevier Science B.V. All rights reserved.
WOS
,
Scopus
,
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Держатели документа:
LV Kirenskii Inst Phys, Russian Acad Sci, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirenskii Institute of Physics, Siberian Br. of Russ. Acad. of Sci., Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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20.
Aplesnin
, S. S.
Influence of the four-spin exchange interaction on the magnetic properties of manganites / S. S.
Aplesnin
, N. I. Piskunova> // J. Phys.: Condens. Matter. - 2005. -
Vol. 17
,
Is. 37
. - P. 5881-5888,
DOI
10.1088/0953-8984/17/37/023. - Cited References: 18 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
METAL-INSULATOR-TRANSITION
PHASE
SUSCEPTIBILITY
LA1-XSRXMNO3
FERROMAGNET
TRANSPORT
Кл.слова (ненормированные):
Computer simulation
--
Ion exchange
--
Lanthanum compounds
--
Magnetic properties
--
Monte Carlo methods
--
Phase diagrams
--
Phase transitions
--
Four-spin exchange interaction
--
Magnetic phase diagram
--
Manganites
--
Metal-dielectric transition
--
Manganese compounds
Аннотация:
It is shown that non-Heisenberg exchange interaction should be taken into account to reproduce the magnetic phase diagram of La(1-x)A(x)MnO(3) (A = Ca, Sr) using only effective exchange parameters and spins. The formation of the four-spin exchange arises from carrier hopping and coincides with the critical concentration metal-dielectric transition. The two- and four-spin exchange parameters are determined by Monte Carlo simulations.
WOS
,
Scopus
,
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Держатели документа:
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660036, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk 660036, Russian Federation
L V Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Science, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
}
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