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1.


    Kotlyarskii, M. M.
    Magnetic phase-diagram of NaMnCl3 / M. M. Kotlyarskii, E. A. Popov // Phys. Status Solidi B. - 1982. - Vol. 111, Is. 1. - P. K13-K16, DOI 10.1002/pssb.2221110150. - Cited References: 10 . - ISSN 0370-1972
РУБ Physics, Condensed Matter


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Доп.точки доступа:
Popov, E. A.
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2.


    Bulgakov, E. N.
    Phase-diagram of the quantum magnet with competing couplings / E. N. Bulgakov // Phys. Status Solidi B. - 1988. - Vol. 148, Is. 2. - P. K139-K141, DOI 10.1002/pssb.2221480242. - Cited References: 7 . - ISSN 0370-1972
РУБ Physics, Condensed Matter


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Доп.точки доступа:
Булгаков, Евгений Николаевич
}
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3.


   
    MAGNETIC PHASE-DIAGRAM OF CRXMN1-XS ANTIFERROMAGNETIC SEMICONDUCTORS / G. A. PETRAKOVSKII [и др.] // Fiz. Tverd. Tela. - 1989. - Vol. 31, Is. 4. - P. 172-176. - Cited References: 7 . - ISSN 0367-3294
РУБ Physics, Condensed Matter


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Доп.точки доступа:
PETRAKOVSKII, G. A.; APLESNIN, S. S.; LOSEVA, G. V.; RYABINKINA, L. L.
}
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4.


   
    Pressure-temperature phase diagram of incommensurate Rb2ZnBr4 / E. V. Shemetov, I. P. Aleksandrova, V. L. Serebrennikov // Twelfth European Crystallographic Meeting : collected abstracts in 3 vols. - Moscow, 1989. - Vol. 1. - P. 526. - Cited References: 3


Доп.точки доступа:
Shemetov, E. V.; Aleksandrova, I. P.; Александрова, Инга Петровна; Serebrennikov, V. L.; European crystallographic meeting(12 ; 1989 ; Aug ; 20-29 ; Moscow); Академия наук СССР; Институт кристаллографии АН СССР; International Union of Crystallography
}
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5.


    Goryachev, E. G.
    Phase-diagram of a ferromagnetic metal with a narrow nondegenerate band - criterion for ferromagnetism / E. G. Goryachev, E. V. Kuzmin // Phys. Lett. A. - 1989. - Vol. 137, Is. 7-8. - P. 423-426, DOI 10.1016/0375-9601(89)90919-5. - Cited References: 6 . - ISSN 0375-9601
РУБ Physics, Multidisciplinary


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Доп.точки доступа:
Kuzmin, E. V.; Кузьмин, Евгений Всеволодович; Горячев, Евгений Геннадьевич
}
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6.


    Valkov, V. V.
    Application of indefinite metric for transition to bose description of Su(3) hamiltonians - excitation spectrum of spin nematics / V. V. Valkov, T. A. Valkova // Zhurnal Eksperimentalnoi Teor. Fiz. - 1991. - Vol. 99, Is. 6. - P. 1881-1897. - Cited References: 37 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary
Рубрики:
BIQUADRATIC EXCHANGE
   PHASE-TRANSITIONS

   DIAGRAM TECHNIQUE

   MAGNETISM

   FIELD

   STATE

Аннотация: A procedure is developed for a correct transition to the Bose representation for quantum SU(3) Hamiltonians. The analysis is carried out for a spin nematic by applying the indefinite metric formalism and pseudo-Hubbard operators. An important aspect of the theory is that the finiteness of the number of physical states is taken into account. This is attained by introducing and consistently taking into account the metric operator for which purpose a simple expression in terms of Bose operators is suggested. It is shown that in this approach the quantum Bose analog of the Hamiltonian is an Hermitian operator. This circumstance removes a number of principle contradictions which appeared previously on application of the Bose analog of the Hamiltonian derived by virtually identifying the Hubbard and pseudo-Hubbard operators and ignoring the finiteness of the number of physical states. The integral equations defining the chief characteristics of the system are obtained and solved analytically for the spin-nematic state of a magnet with S = 1 and by taking into account anharmonic effects. This permits one to write down in nonlinear theory explicit expressions for the two branches of the quantum excitation spectrum. The character of the renormalization of the spectrum parameters due to the presence of zero-point quantum oscillations is studied. The renormalization of the critical field on transition of the system from the spin nematic state is calculated analytically.

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Доп.точки доступа:
Valkova, T. A.; Вальков, Валерий Владимирович
}
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7.


   
    Investigations of ferroelastic phase transitions in ABF6 6H2O crystals (A: Zn, Co, Mg, Mn, Fe; B: Ti, Si) / I. N. Flerov [и др.] // Ferroelectrics. - 1993. - Vol. 143, Is. 1. - P. 11-16, DOI 10.1080/00150199308008307 . - ISSN 0015-0193
Кл.слова (ненормированные):
ferroelastic -- phase transition,  -- birefringence -- phase diagram -- deuteration
Аннотация: Investigations of twinning, birefringence, heat capacity, effect both of deuteration and of hydrostatic pressure were carried out on crystals of ABF6-6H2O family. The high-temperature and high-pressure phases were found in some compounds. The hypothetic p-T phase diagram was suggested describing the variety of phases observed up to now in this family of crystals.

Смотреть статью

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Melnikova, S. V.; Мельникова, Светлана Владимировна; Afanasyev, M. L.; Афанасьев, Михаил Лаврентьевич; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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8.


   
    MAGNETIC-PROPERTIES OF THE VXMN1-XS SYSTEM / G. A. PETRAKOVSKII [и др.] // Fiz. Tverd. Tela. - 1993. - Vol. 35, Is. 8. - P. 2225-2230. - Cited References: 7 . - ISSN 0367-3294
РУБ Physics, Condensed Matter
Рубрики:
PHASE-DIAGRAM

WOS

Доп.точки доступа:
PETRAKOVSKII, G. A.; APLESNIN, S. S.; LOSEVA, G. V.; RYABINKINA, L. I.; YANUSHKEVICH, K. I.; BARANOV, A. V.
}
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9.


    MELNIKOVA, S. V.
    STUDY OF THE T, X PHASE-DIAGRAM OF RBXCS1-XLISO4 CRYSTALS / S. V. MELNIKOVA, V. A. GRANKINA, V. N. VORONOV // Fiz. Tverd. Tela. - 1994. - Vol. 36, Is. 4. - P. 1126-1130. - Cited References: 5 . - ISSN 0367-3294
РУБ Physics, Condensed Matter


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Доп.точки доступа:
GRANKINA, V. A.; VORONOV, V. N.
}
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10.


    Flerov, I. N.
    Entropy of Rb2KB3+F6 (B3+: Se, In, Lu, Er, Ho) ferroelastics and the triple point on T(R(B)(3+)) diagram / I. N. Flerov, M. V. Gorev, V. N. Voronov // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 3. - P. 717-727. - Cited References: 26 . - ISSN 0367-3294
РУБ Physics, Condensed Matter
Рубрики:
STRUCTURAL PHASE-TRANSITIONS
   RB2KMIIIF6 ELPASOLITES


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Доп.точки доступа:
Gorev, M. V.; Voronov, V. N.
}
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11.


    Avramov, P. V.
    Non-diagram transitions in polarized X-ray absorption CuL(3) spectra of HTSC-ceramics / P. V. Avramov, S. G. Ovchinnikov // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 11. - P. 3226-3240. - Cited References: 28 . - ISSN 0367-3294
РУБ Physics, Condensed Matter
Рубрики:
HIGH-TC SUPERCONDUCTIVITY
   LA2CUO4

   ALPHA

   SATELLITES

   STATES

   OXIDES

   XANES


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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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12.


    Sandalov, I. S.
    Local gauge invariance versus slave boson-like representations in systems with strongly correlated electrons / I. S. Sandalov, M. . Richter // Phys. Scr. - 1996. - Vol. 54, Is. 4. - P. 410-416, DOI 10.1088/0031-8949/54/4/020. - Cited References: 38 . - ISSN 0281-1847
РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   VALENCE-BOND STATE

   DIAGRAM TECHNIQUE

   ANDERSON MODEL

   HUBBARD MODEL

   SUPERCONDUCTIVITY

   LIMIT

   PHASE

Аннотация: The flux phase solutions in the t-J model the gauge theories with Chern-Simons term, promising new exciting physics, are so far obtained only within slave-boson (or fermion) approaches, where local gauge invariance is not taken into account exactly. We inspect the possibility to do this, mainly, in the example of the t-J model The analysis of different parametrizations in the functional representation shows that (i) calculations which take into account constraints for the number of on-site-available states are describing quasiparticles in terms of the wrong local statistics, and contain gauge non-invariant objects; (ii) application of the projection technique in the slave-boson(fermion) representation reproduces the correct statistics, and is exactly equivalent to the conventional diagram technique for Hubbard operators. In the language of slave bosons this means that the Fourier transformation leading to Bloch states should be made only after accounting constraints in the measure of functional integral.

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Держатели документа:
UNIV UPPSALA,DEPT PHYS,CONDENSED MATTER THEORY GRP,S-75121 UPPSALA,SWEDEN
RUSSIAN ACAD SCI,LV KIRENSKY PHYS INST,KRASNOYARSK 660036,RUSSIA
DRESDEN UNIV TECHNOL,DEPT PHYS,MPG RES GRP ELECTRON SYST,D-01062 DRESDEN,GERMANY
ИФ СО РАН

Доп.точки доступа:
Richter, M.; Сандалов, Игорь Семёнович
}
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13.


   
    T-x phase diagram of mixed elpasolites Rb2KGaxSc1-xF6 / M. V. Gorev [и др.] // Izv. Akad. Nauk Ser. Fiz. - 1998. - Vol. 62, Is. 8. - P. 1532-1536. - Cited References: 12 . - ISSN 1026-3489
РУБ Physics, Multidisciplinary
Рубрики:
RB2KMIIIF6 ELPASOLITES
   TRANSITIONS

   FERROELASTICS

   RB2KFEF6


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Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bovina, A. F.; Бовина, Ася Федоровна; Chernenko, T. V.; Tressand, A.; Grannes, J.; International Seminar on Physics of Ferroelastics(2 ; 1997 ; Jun 25-27 ; Kazan, Russia)
}
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14.


   
    T-x phase diagram of solid solutions RbxK1-xLiSO4 / S. V. Melnikova [и др.] // Izv. Akad. Nauk Ser. Fiz. - 1998. - Vol. 62, Is. 8. - P. 1537-1540. - Cited References: 4 . - ISSN 1026-3489
РУБ Physics, Multidisciplinary
Рубрики:
TRANSITIONS
   CRYSTALS


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Доп.точки доступа:
Melnikova, S. V.; Grankina, V. A.; Bandarenko, G. V.; Gorev, M. V.; International Seminar on Physics of Ferroelastics(2 ; 1997 ; Jun 25-27 ; Kazan, Russia)
}
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15.


    Sandalov, I.
    From local-density approximation to strong electron correlations / I. . Sandalov, B. . Johansson, O. . Eriksson // Physica B. - 1999. - Vol. 259-61: International Conference on Strongly Correlated Electron Systems (SCES 98) (JUL 15-18, 1998, PARIS, FRANCE). - P. 229-230, DOI 10.1016/S0921-4526(98)00789-3. - Cited References: 4 . - ISSN 0921-4526
РУБ Physics, Condensed Matter
Рубрики:

Кл.слова (ненормированные):
beyond LDA -- correlations -- diagram technique -- non-orthogonality
Аннотация: We formulate a regular approach for ab initio calculations of the band structure, ground state properties (T = 0 K) and excitations (T not equal 0) which goes beyond the local-density approximation (LDA) for systems with d- and f-electrons. A diagram technique for non-zero temperature both from the itinerant and atomic limits is developed within a non-orthogonal basis which is generated by the calculation in LDA. LDA is taken as a reference point. Local electron correlations are taken into account by exact transformation of total Hamiltonian to many-electron representation. The derived system of equations for Green's functions of coupled conduction and correlated electrons (including angular momenta, etc.) is presented in closed functional form which allows to construct accurately self-consistent approximations. The approach can be used also in particular cases of any non-commutative algebras,like different spin models with strong anisotropy, or models of correlated electrons (Hubbard, Anderson) for multiple on-site orbitals. (C) 1999 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Univ Uppsala, Inst Phys, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden
LV Kirensky Phys Inst, Krasnoyarsk 630036, Russia
ИФ СО РАН

Доп.точки доступа:
Johansson, B.; Eriksson, O.
}
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16.


    Gorev, M. V.
    Heat capacity and the p-T phase diagram of Pb2MgTeO6 elpasolite / M. V. Gorev, I. N. Flerov, P. . Sciau // Phys. Solid State. - 2001. - Vol. 43, Is. 2. - P. 345-349, DOI 10.1134/1.1349486. - Cited References: 17 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
ORDERED PEROVSKITE PB2MGTEO6
   CRYSTAL-STRUCTURE

   PB2COWO6

   PB2MGWO6

Аннотация: The heat capacity of Pb2MgTeO6 is measured in the temperature range 80-300 K. It is found that the heat capacity exhibits an anomaly associated with the phase transition at T-0 = 186.9 K. The thermodynamic parameters of the structural transformation are determined. The effect of hydrostatic pressure up to 0.5 GPa on the phase transition temperature is examined. (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, Ctr Mat Improvement & Struct Invest, F-31055 Toulouse, France
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CNRS Ctr. for Mat. I., Tuluza, 31055, France

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Sciau, P.; Горев, Михаил Васильевич
}
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17.


   
    The p-T phase diagram of ammonium hexafluoroaluminate / M. V. Gorev [et al.] // J. Phys.: Condens. Matter. - 2002. - Vol. 14, Is. 25. - P. 6447-6453, DOI 10.1088/0953-8984/14/25/312. - Cited References: 17 . - ISSN 0953-8984
РУБ Physics, Condensed Matter
Рубрики:
NUCLEAR MAGNETIC-RESONANCE
   TRANSITIONS

   MOTIONS

   F-19

   H-1

Кл.слова (ненормированные):
Entropy -- Hydrostatic pressing -- Mathematical models -- Order disorder transitions -- Phase diagrams -- Specific heat of solids -- Ammonium hexafluoroaluminate -- Crolite -- Elpasolite -- Ammonium compounds
Аннотация: The heat capacity and the effect of hydrostatic pressure on structural phase transitions in ammonium hexafluoroaluminate, (NH4)(3)AlF6, have been studied. Two heat capacity anomalies have been found with maxima at T-1 = 218.5 +/- 0.5 K and T-2 = 179 +/- 2 K. Respective entropy changes of phase transitions are DeltaS(1) = 15.3 +/- 0.5 J mol(-1) K-1 and DeltaS(2) = 2.5 +/- 0.5 J mol(-1) K-1. It is shown that the p-T phase diagram of this compound is rather complex and contains a triple point (p(tp) = 0.12 GPa, T-tp = 221 K) and high-pressure phase. The mechanism of transformations and generalized p-T phase diagram for compounds of the (NH4)(3)(MF6)-F-III family are discussed within the framework of the rotational order-disorder model.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France
ИФ СО РАН
L. V. Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Institut de Chimie de la Matiere Condensee de Bordeaux, 33608 Pessac, France

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Tressaud, A.; Durand, E.
}
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18.


    Bulgakov, E. N.
    Vortex phase diagram of F=1 spinor Bose-Einstein condensates / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. Lett. - 2003. - Vol. 90, Is. 20. - Ст. 200401, DOI 10.1103/PhysRevLett.90.200401. - Cited References: 15 . - ISSN 0031-9007
РУБ Physics, Multidisciplinary
Рубрики:
ATOMS
   CREATION

   GASES

Аннотация: We have calculated the F=1 ground state of a spinor Bose-Einstein condensate trapped harmonic potential with an applied Ioffe-Pitchard magnetic field. The vortex phase diagram is found in the plane spanned by perpendicular and longitudinal magnetic fields. The ferromagnetic condensate has two vortex phases which differ by winding number in the spinor components. The two vortices for the F-z=-1 antiferromagnetic condensate are separated in space. Moreover, we considered an average local spin \[(S) over right arrow]\ to testify to what extent it is parallel to magnetic field (the nonadiabatic effects). We have shown that the effects are important at vortex cores.

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Держатели документа:
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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19.


   
    Ferroelastic phase transitions in fluorides with cryolite and elpasolite structures / I. N. Flerov [et al.] // Crystallogr. Rep. - 2004. - Vol. 49, Is. 1. - P. 100-107, DOI 10.1134/1.1643969. - Cited References: 43 . - ISSN 1063-7745
Рубрики:
NUCLEAR MAGNETIC-RESONANCE
   THERMODYNAMIC PROPERTIES

   RB2KMIIIF6 ELPASOLITES

   NEUTRON-DIFFRACTION

   CRYSTALS

   PEROVSKITES

   DIAGRAM

   SC

   RB2KGAXSC1-XF6

   SCATTERING

Аннотация: The ferroelastic phase transitions are investigated in several series of fluoride crystals belonging to the elpasolite and cryolite families (space group Fm (3) over barm) with the general formula A(2)BB'F-6. The influence of the size and shape of cations and anions on the entropy and the mechanism of structural distortions is discussed. (C) 2004 MAIK "Nauka/Interperiodica".

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Публикация на русском языке Сегнетоэластические фазовые переходы во фторидах со структурой криолита и эльпасолита [Текст] / И. Н. Флеров [и др.] // Кристаллография. - 2004. - Т. 49 Вып. 1. - С. 107-114

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France
ИФ СО РАН

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Tressaud, A.; Fokina, V. D.; Фокина, Валентина Дмитриевна
}
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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.

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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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