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Linear and circular magnetic dichroism in thin films of lanthanum manganite [Текст] / Yu. E. Greben'kova [и др.] // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P. 324 . - ISBN 978-5-7444-3124-2

Доп.точки доступа:
Greben'kova, Yu.E.; Гребенькова, Юлия Эрнестовна; Sokolov, A. E.; Соколов, Алексей Эдуардович; Edel'man, I. S.; Эдельман, Ирина Самсоновна; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В. И.; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
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Non-linear electromechanical properties and propagation of acoustic waves under the action of external static fields in the piezoelectric La3Ga5SiO14 / K. S. Aleksandrov [et al.] // Russ. Ultrason. - 1997. - Vol. 27, Is. 3. - P. 193-196 . - ISSN 0048-8828
Кл.слова (ненормированные):
Acoustic wave transmission -- Anisotropy -- Data reduction -- Electric field effects -- Electrostriction -- Lanthanum compounds -- Piezoelectric materials -- External static fields -- Nonlinear electromechanical properties (NEMP) -- Single crystals
Аннотация: A full set of parameters has been obtained for the linear and non-linear electrostriction properties of an La3Ga5SiO14 single crystal. The data have been used for an analysis of the anisotropy of the anharmonic effects and special features of the influence of a constant electric field on the propagation of acoustic waves in this crystal.

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Держатели документа:
Krasnoyarsk State Univ, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Turchin, P. P.; Sorokin, B. P.; Burkov, S. I.; Красноярский государственный университет
}
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Influence of static electric field, mechanical pressure and temperature on the propagation of acoustic waves in La3Ga5SiO14 piezoelectric single crystals / B. P. Sorokin [et al.] // Proc Annu IEEE Int Freq Control Symp. - 1996. - P. 161-169 . - ISBN 01616404
Кл.слова (ненормированные):
Acoustic wave transmission -- Anisotropy -- Electric field effects -- Lanthanum compounds -- Piezoelectric materials -- Pressure effects -- Thermal effects -- Piezoelectric single crystals -- Single crystals
Аннотация: On the fundamental of our original experimental results the full set of tensorial components of linear and nonlinear electromechanical properties and temperature coefficients of material properties for La3Ga5SiO14 piezoelectric crystals have been obtained. These data were used for the analysis of influence of static electrical field and of uniaxial homogeneous mechanical pressure on the propagation anisotropy of acoustic waves superposed by the temperature variations.

Scopus

Доп.точки доступа:
Sorokin, B. P.; Turchin, P. P.; Burkov, S. I.; Glushkov, D. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; International frequency control symposium(50 ; 1996 ; Jun. ; 5-7 ; Honolulu, HI, USA)
}
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Effects of static electric field and of mechanical pressure on surface acoustic waves propagation in La3Ga5SiO14 piezoelectric single crystals / K. S. Aleksandrov [et al.] // Proc IEEE Ultrason Symp. - 1995. - Vol. 1. - P. 409-412 . - ISBN 1051-0117
Кл.слова (ненормированные):
Electric field effects -- Electrostriction -- Lanthanum compounds -- Piezoelectric materials -- Piezoelectricity -- Pressure effects -- Quartz -- Single crystals -- Tensors -- Bulk acoustic wave -- Dielectric permeability -- Electromechanical bond coefficients -- Lanthanum gallium silicide -- Mechanical pressure -- Nonlinear electromechanical properties -- Nonlinear piezoelectric effect -- Piezoquartz -- Static electric field -- Tensorial components -- Ultrasonic propagation
Аннотация: The complete set of tensorial components of linear and nonlinear electromechanical properties for La3Ga5SiO14 piezoelectric crystals have been obtained. These data were used for the analysis of influence of static electrical field and of uniaxial homogeneous mechanical pressure on the propagation of surface acoustic waves.

Scopus

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Sorokin, B. P.; Turchin, P. P.; Burkov, S. I.; Glushkov, D. A.; Karpovich, A. A.; IEEE International Ultrasonics Symposium(1995 ; Nov. ; 7-10 ; Seattle, USA)
}
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Relaxation of low-temperature magnetoresistance and magnetization of polycrystalline (La0.5Eu0.5)(0.7)Pb0.3MnO3 / K. A. Shaykhutdinov [et al.] // J. Phys. D. - 2011. - Vol. 44, Is. 25. - Ст. 255001, DOI 10.1088/0022-3727/44/25/255001. - Cited References: 34. - This work was partially supported by the Lavrentyev Competition of the Young Scientist's Projects of the Siberian Branch of the Russian Academy of Sciences, Project No 12. The authors are grateful to A D Balaev and V M Sosnin for useful discussions on the results. . - ISSN 0022-3727

РУБ Physics, Applied
Рубрики:
INSULATOR-METAL TRANSITION
   GRANULAR FILMS
   NANOPARTICLES
   PR0.7CA0.3MNO3
   PERCOLATION
   MANGANITES
Кл.слова (ненормированные):
Antiferromagnetic boundaries -- Characteristic value -- Ferromagnetic domains -- Ferromagnetic metal -- Lanthanum manganites -- Logarithmic law -- Low temperatures -- Magneto-resistive effect -- Polycrystalline -- Relative orientation -- Relaxation of magnetization -- Temperature fluctuation -- Time evolutions -- Time interval -- Tunnel magnetoresistance -- Antiferromagnetism -- Electric resistance -- Europium -- Ferromagnetic materials -- Ferromagnetism -- Grain boundaries -- Grain size and shape -- Lanthanum compounds -- Lead -- Magnetic domains -- Magnetic moments -- Magnetoelectronics -- Magnetoresistance -- Manganese oxide -- Magnetization
Аннотация: Hysteresis and relaxation of magnetoresistance and magnetization of substituted (La0.5Eu0.5)(0.7)Pb0.3MnO3 lanthanum manganite in a low-temperature region (< 40 K) are investigated. It is shown that at these temperature features of the magnetoresistive effect are determined mainly by spin-dependent tunnelling of carriers via insulating grain boundaries. As was demonstrated previously, the grain boundaries may be antiferromagnetically ordered. Therefore, relaxation of magnetization and resistance is determined by the processes of relative orientation of the magnetic moments of ferromagnetic domains neighbouring the antiferromagnetic boundary of ferromagnetic domains under the action of temperature fluctuations. It is shown that relaxation follows the logarithmic law within the time interval t similar to 10(2)-3x10(3) s. A comparison between time evolutions of the magnetic moment and resistance shows that magnetoresistance and magnetization are related as delta R = delta M-n, where n = 2.5. The obtained value n is close to the characteristic value n = 2 for tunnel magnetoresistance of granular ferromagnetic metal/insulator systems.

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Держатели документа:
[Shaykhutdinov, K. A.
Balaev, D. A.
Semenov, S. V.
Popkov, S. I.
Dubrovskiy, A. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Popkov, S. I.; Попков, Сергей Иванович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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Electronic Structure of p-Type La1-xMx2+MnO3 Manganites in the Ferromagnetic and Paramagnetic Phases in the LDA plus GTB Approach / V. A. Gavrichkov [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 5. - P. 860-876, DOI 10.1134/S1063776111030101. - Cited References: 47. - This study was supported financially by integration project no. 40 of the Ural and Siberian Branches of the Russian Academy of Sciences, the program "Strong Electron Correlations" of the Russian Academy of Sciences, and the Russian Foundation for Basic Research (project no. 10-02-00251-a). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
DOUBLE-EXCHANGE
   COLOSSAL MAGNETORESISTANCE
   THIN-FILMS
   PHYSICS
   LA1-XSRXMNO3
   RESISTIVITY
   SEPARATION
   TRANSPORT
   MODEL
Кл.слова (ненормированные):
Complex structure -- Cubic materials -- Ferromagnetic phase -- Half metals -- Jahn Teller effect -- Metal properties -- Metal types -- Orbitals -- P-type -- Paramagnetic phase -- Paramagnetic phasis -- Quasi particles -- Spectral intensity -- Spin projections -- Strong electron correlations -- Barium -- Density functional theory -- Electron correlations -- Electron density measurement -- Electronic properties -- Electronic structure -- Fermi level -- Ferromagnetic materials -- Ferromagnetism -- Manganese oxide -- Manganites -- Paramagnetic materials -- Paramagnetism -- Valence bands -- Lanthanum
Аннотация: The band structure, spectral intensity, and position of the Fermi level in doped p-type La1-xMx2+ MnO3 manganites (M = Sr, Ca, Ba) is analyzed using the LDA + GBT method for calculating the electronic structure of systems with strong electron correlations, taking into account antiferro-orbital ordering and using the Kugel-Khomskii ideas and real spin S = 2. The results of the ferromagnetic phase reproduce the state of a spin half-metal with 100% spin polarization at T = 0, when the spectrum is of the metal type for a quasiparticle with one spin projection and of the dielectric type for the other. It is found that the valence band becomes approximately three times narrower upon a transition to the paramagnetic phase. For the paramagnetic phase, metal properties are observed because the Fermi level is located in the valence band for any nonzero x. The dielectrization effect at the Curie temperature is possible and must be accompanied by filling of d(x) orbitals upon doping. The effect itself is associated with strong electron correlations, and a complex structure of the top of the valence band is due to the Jahn-Teller effect in cubic materials. DOI: 10.1134/S1063776111030101

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Публикация на русском языке Электронная структура манганитов La[1-x]M[x]2+MnO[3] p-типа в ферромагнитной и парамагнитной фазах в рамках LDA+GTB-подхода [Текст] / В. А. Гавричков [и др.] // Журнал экспериментальной и теоретической физики. - 2011. - Т. 139 Вып. 5. - С. 983-1000

Держатели документа:
[Gavrichkov, V. A.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Gavrichkov, V. A.
Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Nekrasov, I. A.] Russian Acad Sci, Ural Branch, Inst Electrophys, Ekaterinburg 620016, Russia
[Pchelkina, Z. V.] Russian Acad Sci, Ural Branch, Inst Met Phys, Ekaterinburg 620990, Russia
ИФ СО РАН
Siberian Branch, Kirensky Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Ural Branch, Institute of Electrophysics, Russian Academy of Sciences, Yekaterinburg, 620016, Russian Federation
Ural Branch, Institute of Metal Physics, Russian Academy of Sciences, Yekaterinburg, 620990, Russian Federation

Доп.точки доступа:
Gavrichkov, V. A.; Гавричков, Владимир Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Nekrasov, I. A.; Pchelkina, Z. V.
}
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Magnetoresistance of substituted lanthanum manganites La0.7Ca0.3MnO3 upon nonequilibrium overheating of carriers / K. A. Shaykhutdinov [et al.] // J. Appl. Phys. - 2011. - Vol. 109, Is. 8. - Ст. 83711, DOI 10.1063/1.3573666. - Cited References: 15. - This study was partially supported by the Russian Foundation for Basic Research, project no. 08-02-00259a, and the Lavrent'ev's Competition of Young Scientists of the Siberian Branch of the RAS, project no. 12. . - ISSN 0021-8979

РУБ Physics, Applied

Кл.слова (ненормированные):
Field dependence -- Lanthanum manganites -- Low thermal conductivity -- Manganite materials -- Negative differential resistivity -- Non equilibrium -- Non-Linearity -- Nonequilibrium heating -- Polycrystalline -- Positive magnetoresistance -- Transport currents -- Electric resistance -- Electron gas -- Heating -- Lanthanum -- Lanthanum alloys -- Magnetic fields -- Magnetoelectronics -- Magnetoresistance -- Manganese oxide -- Manganites -- Thermal conductivity -- Current voltage characteristics
Аннотация: Current-voltage characteristics of the polycrystalline substituted lanthanum manganite La0.7Ca0.3MnO3 were experimentally studied at T - 77.4 K in magnetic fields up to 13 kOe. In these characteristics, a portion of negative differential resistivity was observed above a certain threshold value of critical current density j caused, in our opinion, by nonequilibrium heating of the electron gas due to low thermal conductivity of the manganite material. Because of the nonlinearity of the current-voltage characteristics, the field dependences of resistivity rho( H) appear extremely sensitive to the value of a transport current. In this case, the rho( H) dependences reveal both ordinary negative and positive magnetoresistance. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3573666]

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Держатели документа:
[Shaykhutdinov, K. A.
Semenov, S. V.
Popkov, S. I.
Balaev, D. A.
Bykov, A. A.
Dubrovskiy, A. A.
Petrov, M. I.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Popkov, S. I.; Попков, Сергей Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Bykov, A. A.; Быков, Алексей Анатольевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Petrov, M. I.; Петров, Михаил Иванович; Volkov, N. V.; Волков, Никита Валентинович
}
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Low-temperature resistance and magnetoresistance hysteresis in polycrystalline (La0.5Eu0.5)(0.7)Pb0.3MnO3 / K. A. Shaykhutdinov [et al.] // J. Appl. Phys. - 2011. - Vol. 109, Is. 5. - Ст. 53711, DOI 10.1063/1.3559303. - Cited References: 20. - This study was partially supported by the Russian Foundation for Basic Research, Project No. 08-02-00259a and the Lavrentyev Competition of the Young Scientists' Projects of the Siberian Branch of the Russian Academy of Sciences, Project No. 12. . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
RESISTIVITY MINIMUM
MANGANITES
FILMS
Кл.слова (ненормированные):
Antiferromagnets -- Electrical resistances -- Ferromagnets -- Field dependence -- Inter-grain -- Lanthanum manganites -- Low temperatures -- Low-temperature resistance -- Polycrystalline -- Temperature dependence -- Tunnel contacts -- Antiferromagnetic materials -- Europium -- Ferromagnetic materials -- Ferromagnetism -- Hysteresis -- Lead -- Magnetic field effects -- Magnetoelectronics -- Magnetoresistance -- Magnets -- Manganese oxide -- Paramagnetism -- Superconducting materials -- Electric resistance
Аннотация: The behavior of temperature dependences of electrical resistance and magnetoresistance of polycrystalline substituted lanthanum manganite (La0.5Eu0.5)(0.7)Pb0.3MnO3 at low temperatures was thoroughly studied. A broad hysteresis was found in the field dependences of electrical resistance in the low-temperature region. Above 40 K, no hysteresis feature was observed. The temperature T = 40 K corresponds to the temperature of minimum electrical resistance and the temperature T-N to the antiferromagnet-paramagnet phase transition of the material of the intergrain boundaries. In this work we propose a model which explains the observed features of the rho(T) and rho(H) curves at temperatures below T-N by the formation of a network of ferromagnet-antiferromagnet-ferromagnet tunnel contacts. (C) 2011 American Institute of Physics. [doi:10.1063/1.3559303]

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Держатели документа:
[Shaykhutdinov, K. A.
Popkov, S. I.
Semenov, S. V.
Balaev, D. A.
Dubrovskiy, A. A.
Sablina, K. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Семенов, Сергей Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sablina, K. A.; Саблина, Клара Александровна; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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Non-linear current-voltage characteristics of (La0.5Eu0.5)(0.7)Pb0.3MnO3 single crystals: Possible manifestation of the internal heating of charge carriers / K. A. Shaykhutdinov [et al.] // Physica B. - 2010. - Vol. 405, Is. 24. - P. 4961-4965, DOI 10.1016/j.physb.2010.09.043. - Cited References: 19. - The authors are grateful to A.N. Lavrov for useful discussions on the results. This study was partially supported by the Russian Foundation for Basic Research, Project no. 08-02-00259a and the Lavrent'ev Young Scientists' Competition of the Siberian Branch of the Russian Academy of Sciences. Project no. 12. . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
INSULATOR-METAL TRANSITION
PR0.7CA0.3MNO3
MANGANITES
Кл.слова (ненормированные):
Manganites -- Negative differential resistance -- CVC -- CVC -- Manganites -- Negative differential resistance -- Applied electric field -- Charge ordering -- Current switching -- CVC -- Dielectric regions -- Experimental data -- Internal heating -- Lanthanum manganites -- Metal-dielectric transition -- Negative differential resistances -- Non equilibrium -- Non-linear -- Sample heating -- Temperature evolution -- Transport currents -- Electric fields -- Electron gas -- Europium -- Heating -- Lanthanum -- Lead -- Manganites -- Negative resistance -- Phase separation -- Single crystals -- Thermal conductivity -- Manganese oxide
Аннотация: Temperature evolution of the current-voltage characteristics (CVCs) of a single-crystal lanthanum manganite (La0.5Eu0.5)(0.7)Pb0.3MnO3 is investigated in a wide (up to 1 A) range of instrumental currents. Effects of a transport current and an applied electric field on the resistance of the material are studied in view of possible implementation of the charge ordering break in dielectric regions occurring due to phase separation in manganites. A negative differential resistance portion observed in the CVCs suggests the presence of a current switching effect. Below the temperature of the metal-dielectric transition in (La0.5Eu0.5)(0.7)Pb0.3MnO3, the hysteresis is observed in the CVC. The detailed analysis of the internal sample heating on the basis of experimental data on thermal conductivity showed, however, that these CVC features can be explained within the concept of non-equilibrium heating of electron gas. (C) 2010 Elsevier B.V. All rights reserved.

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Держатели документа:
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Semenov, S. V.
Bykov, A. A.
Dubrovskiy, A. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Bykov, A. A.; Быков, Алексей Анатольевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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10.

Current-voltage characteristics of break junctions of high-T-c superconductors / D. M. Gokhfeld [et al.] // Physica C. - 2007. - Vol. 467, Is. 1-2. - P. 80-84, DOI 10.1016/j.physc.2007.09.001. - Cited References: 19 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   ANDREEV REFLECTION
   POLYCRYSTALLINE HTSC
   WEAK LINKS
   COMPOSITES
Кл.слова (ненормированные):
network of weak links -- Andreev reflection -- hysteretic peculiarity -- Andreev reflection -- Hysteretic peculiarity -- Network of weak links -- Lanthanum compounds -- Mathematical models -- Polycrystalline materials -- Superconducting materials -- Andreev reflection -- Break junctions -- Hysteretic peculiarity -- Network of weak links -- Current voltage characteristics
Аннотация: The current-voltage (I-V) characteristics of break junctions of polycrystalline La1.85Sr0.15CuO4, Y0.75Lu0.25Ba2Cu3O7-delta, Bi1.8Pb0.3Sr1.9Ca2Cu3Ox and composite YBa2Cu3O7-delta + Ag are investigated. The experimental I-V curves exhibit the specific peculiarities of superconductor/normal-metal/superconductor junctions. The relation between an I-V characteristic of network of weak links and I-V dependencies of typical weak links is suggested to describe the experimental data. The I-V curves of typical weak links are calculated by the Kummel-Gunsenheimer-Nicolsky model considering the multiple Andreev reflections. (c) 2007 Elsevier B.V. All rights reserved.

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Держатели документа:
[Gokhfeld, D. M.
Balaev, D. A.
Shaykhutdinov, K. A.
Popkov, S. I.
Petrov, M. I.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirensky Institute, Physics SD RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
}
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