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Общее количество найденных документов : 233
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1.


    Bogomaz, I. V.
    Spin-waves in amorphous anti-ferromagnets / I. V. Bogomaz, V. A. Ignatchenko, R. S. Iskhakov // Phys. Status Solidi B. - 1980. - Vol. 98, Is. 1. - P. 111-115, DOI 10.1002/pssb.2220980110. - Cited References: 6 . - ISSN 0370-1972
РУБ Physics, Condensed Matter


WOS
Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович
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2.


   
    Combined Effects of 2D and 3D Inhomogeneities on the Dynamic Susceptibility of Superlattices / V. A. Ignatchenko, D. S. Tsikalov // TRENDS IN MAGNETISM / . - STAFA-ZURICH : TRANS TECH PUBLICATIONS LTD, 2011. - Vol. 168-169. - P97-100. - (Solid State Phenomena), DOI 10.4028/www.scientific.net/SSP.168-169.97. - Cited Reference Count: 10 . - ISBN 1012-0394
Рубрики:
Materials Science, Multidisciplinary
   Physics, Condensed Matter

Кл.слова (ненормированные):
waves -- superlattices -- inhomogeneities -- dynamic susceptibility -- dos
Аннотация: The dynamic susceptibility and the one-dimensional density of states (DOS) of an initially sinusoidal superlattice (SL) with simultaneous presence of two-dimensional (2D) phase inhomogeneities that simulate the deformations of the interfaces between the SL's layers and three-dimensional (3D) amplitude inhomogeneities of the layer material of the SL were investigated. An analytical expression for the averaged Green's function of the sinusoidal SL with 2D phase inhomogeneities was obtained in the Bourret approximation. It was shown that the effect of increasing asymmetry of heights of the dynamic susceptibility peaks at the edge of the Brillouin zone of the SL, which was found in [6] at increasing the rms fluctuations of 2D inhomogeneities, also takes place at increasing the correlation wave number of such inhomogeneities. It was also shown that The increase of the tins fluctuations of 3D amplitude inhomogeneities in the superlattice with 2D phase inhomogeneities leads to the suppression of the asymmetry effect and to the decrease of the depth of the DOS gap.

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Держатели документа:
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); Russian Acad Sci, Inst Metal Phys
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3.


   
    Crossing resonance of two wave fields in disordered media / V. A. Ignatchenko [et al.] // Phys. Rev. B. - 1999. - Vol. 59, Is. 14. - P. 9185-9194, DOI 10.1103/PhysRevB.59.9185. - Cited References: 15 . - ISSN 0163-1829
РУБ Physics, Condensed Matter
Рубрики:
HARMONIC OSCILLATOR
   POLARITONS

Аннотация: The interaction of two wave fields of different nature in a disordered medium with an arbitrary relation between the mean value P and rms fluctuation lambda of the coupling parameter is studied. A significant reconstruction of the eigenfrequencies, damping parameters, and susceptibilities of the system occurs when the situation changes from the model of a homogeneous medium (P not equal 0, lambda=0) to the model of the disorder-induced crossing resonance (P=0, lambda not equal 0). The concept of two effective media in the same material, which was introduced for the latter model in earlier work, is extended here to the case P not equal 0. [S0163-1829(99)10313-8].

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Читать в сети ИФ
Держатели документа:
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Univ Calif Irvine, Irvine, CA 92697 USA
Seton Hall Univ, S Orange, NJ 07079 USA
ИФ СО РАН

Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Erementchouk, M. V.; Maradudin, A. A.; Deych, L. I.
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4.


    Deich, L. I.
    Effect of spatial fluctuations of the magnetization modulus on the properties of amorphous ferromagnets / L. I. Deich, V. A. Ignatchenko // Zhurnal Eksperimentalnoi Teor. Fiz. - 1991. - Vol. 99, Is. 3. - P. 816-830. - Cited References: 27 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary
Рубрики:
TEMPERATURE-DEPENDENCE
   SPIN-WAVES

   FILMS

   SATURATION

   LAW

Аннотация: A model of amorphous ferromagnets with longwave spatial fluctuations of the magnetization modulus M is studied. It is shown that for a correct understanding of the properties of the model, it is principally necessary to take into account the magnetic dipole interaction. This interaction enhances the contribution of the fluctuations of M to the ground state, dispersion law and spin wave attenuation. The spectral and correlation properties of the inhomogeneous ground state and the law of approach of the magnetization to saturation in the model are studied. The dispersion law and spin wave attenuation are investigated. A novel mechanism of formation of a correction of the form T5/2 to the Bloch law in the low temperature dependence of the magnetization is proposed.

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Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
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5.


    Deich, L. I.
    Elastic and spin-waves in a nonuniformly deformed medium / L. I. Deich, V. A. Ignatchenko // Fiz. Tverd. Tela. - 1987. - Vol. 29, Is. 3. - P. 825-831. - Cited References: 12 . - ISSN 0367-3294
РУБ Physics, Condensed Matter


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Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
}
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6.


    Deich, L. I.
    Elastic waves in random-heterogeneous ferromagnetics in magnetoelastic resonance / L. I. Deich, M. V. Eremenchuk, V. A. Ignatchenko // Zhurnal Eksperimentalnoi Teor. Fiz. - 1996. - Vol. 109, Is. 4. - P. 1370-1386. - Cited References: 5 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary


WOS
Доп.точки доступа:
Eremenchuk, M. V.; Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
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7.


    Deich, L. I.
    Elastic-waves in local-isotropic amorphous medium / L. I. Deich, V. A. Ignatchenko // Fiz. Tverd. Tela. - 1985. - Vol. 27, Is. 6. - P. 1883-1885. - Cited References: 3 . - ISSN 0367-3294
РУБ Physics, Condensed Matter


WOS
Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
}
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8.


    Deich, L. I.
    Magnetoelastic resonance in random-nonhomogeneous ferromagnetics with zero medium magnetostriction / L. I. Deich, V. A. Ignatchenko // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. - Vol. 107, Is. 3. - P. 842-854. - Cited References: 14 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary
Рубрики:
amorphous ferromagnets
   spin-waves

   magnetization

   fluctuations

   saturation


WOS

Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
}
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9.


    Deich, L. I.
    Phonon spectroscopy of inhomogeneities in disordered solids / L. I. Deich, V. A. Ignatchenko // Solid State Commun. - 1991. - Vol. 80, Is. 10. - P. 881-884, DOI 10.1016/0038-1098(91)90525-Z. - Cited References: 15 . - ISSN 0038-1098
РУБ Physics, Condensed Matter
Рубрики:
SPIN-WAVES
   AMORPHOUS FILMS

   DISPERSION

   FERROMAGNETS

Аннотация: A possibility to use elastic waves for investigation of inhomogeneities corresponding in size to intermediate order in disordered solids is considered. It is shown that frequency dependencies of phase and group velocities of the elastic waves have some peculiarities which give the possibilities to find the characteristic size of inhomogenities and to determine the parameter of a matter whose fluctuations are most significant for the phenomena under study.

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Scopus
Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН

Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
}
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10.


    Deich, L. I.
    Polarization properties of elastic-waves in anisotropic disordered media / L. I. Deich, V. A. Ignatchenko ; ed.: M Meissner, er, M Meis // Phonon scattering in condensed matter : proceedings : Springer Verlag, 1993. - Vol. 112. - P. 231-232. - (Springer series in solid-state sciences). - Cited References: 0 . - ISBN 0171-1873. - ISBN 3-540-56395-4
РУБ Physics, Condensed Matter


WOS
Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Meissner, M \ed.\; Meis, er, M \ed.\; Дейч, Лев Исаакович; International Conference on Phonon Scattering in Condensed Matter(7 ; Aug 03-07, 1992 ; Ithaca, NY)
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