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Enhancing coherent nonlinear-optical processes in nonmagnetic backward-wave materials / A. K. Popov [и др.] // The 3th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META’12) : Proceedings. - 2012. - P. 66
Аннотация: Novel concepts of nonlinear-optical (NLO) photonic metamaterials (MMs) are proposed. They concern with greatly enhanced coherent NLO energy exchange between ordinary and backward waves (BWs) through the frequency-conversion processes. Two different classes of materials which support BWs are considered: crystals that support optical phonons with negative group velocity and MMs with specially engineered spatial dispersion. The possibility to replace plasmonic NLO MMs enabling magnetic response at optical frequencies, which are very challenging to engineer, by the ordinary readily available crystals, are discussed. The possibility to mimic extraordinary NLO frequency-conversion propagation processes attributed to negative-index MMs (NIMs) is shown in some of such crystals, if optical phonons with negative group velocity and a proper phase-matching geometry are implemented. Here, optical phonons are used as one of the coupled counterparts instead of backward electromagnetic waves (BEMWs). The appearance of BEMWs in metaslabs made of carbon nanotubes, the possibilities and extraordinary properties of BW second harmonic generation in such MMs is another option of nonmagnetic NIMs, which is described too. Among the applications of the proposed photonic materials is the possibility of creation of a family of unique BW photonic devices such as frequency doubling metamirror and Raman amplifiers with greatly improved efficiency.

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Доп.точки доступа:
Popov, A. K.; Попов, Александр Кузьмич; Shalaev, M. I.; Myslivets, S. A.; Мысливец, Сергей Александрович; Slabko, V. V.; Слабко, Виталий Васильевич; Nefedov, I. S.; International conference on metamaterials, photonic crystals and plasmonics(3 ; 2012 ; 19-22 apr ; Paris, France)
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    Enhancing coherent nonlinear-optical processes in nonmagnetic backward-wave materials / A. K. Popov [et al.] // Appl. Phys. A. - 2012. - Vol. 109, Is. 4. - P. 835-840, DOI 10.1007/s00339-012-7390-8. - Cited References: 35. - This work was supported in part by the U.S. National Science Foundation under Grant No. ECCS-1028353, by the US Air Force Office of Scientific Research under Grant No. FA9550-12-1-298; by the Presidium of the Russian Academy of Sciences under Project No. 24.31, by the Ministry of Science under Federal Research Program No. 14.V37.21.0730 and by the Siberian Division of the Russian Academy of Sciences and Siberian Federal University under Integration Project No. 101; and by the Academy of Finland and Nokia through the Center-of-Excellence program. . - ISSN 0947-8396
Рубрики:
NEGATIVE-INDEX METAMATERIALS
   LEFT-HANDED METAMATERIALS
   2ND-HARMONIC GENERATION
   PARAMETRIC AMPLIFICATION
   COMPENSATING LOSSES
   OSCILLATOR
Аннотация: Novel concepts of nonlinear-optical (NLO) photonic metamaterials (MMs) are proposed. They concern with greatly enhanced coherent NLO energy exchange between ordinary and backward waves (BWs) through the frequency-conversion processes. Two different classes of materials which support BWs are considered: crystals that support optical phonons with negative group velocity and MMs with specially engineered spatial dispersion. The possibility to replace plasmonic NLO MMs enabling magnetic response at optical frequencies, which are very challenging to engineer, by the ordinary readily available crystals, are discussed. The possibility to mimic extraordinary NLO frequency-conversion propagation processes attributed to negative-index MMs (NIMs) is shown in some of such crystals, if optical phonons with negative group velocity and a proper phase-matching geometry are implemented. Here, optical phonons are used as one of the coupled counterparts instead of backward electromagnetic waves (BEMWs). The appearance of BEMWs in metaslabs made of carbon nanotubes, the possibilities and extraordinary properties of BW second harmonic generation in such MMs is another option of nonmagnetic NIMs, which is described too. Among the applications of the proposed photonic materials is the possibility of creation of a family of unique BW photonic devices such as frequency doubling metamirror and Raman amplifiers with greatly improved efficiency.

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Доп.точки доступа:
Popov, A. K.; Shalaev, M. I.; Myslivets, S. A.; Мысливец, Сергей Александрович; Slabko, V. V.; Слабко, Виталий Васильевич; Nefedov, I. S.; International conference on metamaterials, photonic crystals and plasmonics(3 ; 2012 ; 19-22 apr ; Paris, France)
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The effect of nonmagnetic and magnetic impurities in the normal metal layer - N of network of weak S-N-S junctions in composites on high temperature superconductors basis / M. I. Petrov [et al.] // Physica C-Superconductivity and its Applications. - 1997. - Vol. 282, Is. PART 4. - P. 2447-2448 . - ISSN 0921-4534
Кл.слова (ненормированные):
Charge carriers -- Composite materials -- Electric currents -- High temperature superconductors -- Impurities -- Magnetic materials -- Transport properties -- Superconducting normal metal superconducting junctions -- Superconducting devices
Аннотация: Composites HTSC + normal metal with magnetic and nonmagnetic impurities have been prepared. Transport properties of these composites have been studied. Supercurrent in the composites is weakened by magnetic impurities in greater degree than by nonmagnetic ones. It indicates that carriers in HTSC with 1-2-3 structure are mostly the conventional singlet pairs.

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Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Оспищев С. В.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
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    Nonmagnetic vs. magnetic disorder in Fe-based superconductors / M. M. Korshunov [et al.] // XXXVII Совещание по физике низких температур (НТ-37) : программа и тезисы докладов. - 2015. - P277-278. - Библиогр.: 10 назв. . - ISBN 978-5-00019-436-2
   Перевод заглавия: Немагнитный и магнитный беспорядок в сверхпроводниках на основе железа

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Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Togushova, Yu.N.; Тогушова Ю.Н.; Dolgov, O. V.; Efremov, D. V.; Golubov, A. A.; Казанский (Приволжский) федеральный университет; Институт физических проблем им. П. Л. Капицы РАН; Совещание по физике низких температур(37 ; 2015 ; 29 июня - 3 июля ; Казань)
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Effect of the nonmagnetic layer in a Co/Cu/CoO trilayer structure on the exchange coupling in it / P. D. Kim [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 4. - P. 612-616, DOI 10.1134/S1063776111030058. - Cited References: 21 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPACER LAYER
BIAS
ANISOTROPY
Кл.слова (ненормированные):
Cobalt layers -- Copper layer -- Exchange bias -- Interlayer exchange coupling -- Nonmagnetic layers -- Oscillation amplitude -- Temperature dependence -- Temperature range -- Trilayer film -- Trilayer structure -- Cobalt -- Crystal structure -- Epitaxial films -- Hysteresis -- Hysteresis loops -- Magnetic materials -- Exchange coupling
Аннотация: The dependence of the exchange bias of epitaxial single-crystal Co/Cu/CoO trilayer films on the copper layer thickness and temperature is studied. The exchange bias of the hysteresis loops of the ferromagnetic cobalt layer as a function of the copper layer thickness is found to have a well-pronounced oscillating character. The oscillations manifest themselves over the entire temperature range in which an exchange bias takes place (77-220 K). The complex variation of the oscillation amplitude with the nonmagnetic layer thickness can be explained by the superposition of two interlayer exchange coupling oscillation periods (lambda(1) a parts per thousand 10-11 , lambda(2) a parts per thousand 20 ) having differentamplitudes and temperature dependences.

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Держатели документа:
[Kim, P. D.
Patrin, G. S.
Turpanov, I. A.
Khalyapin, D. L.
Marushchenko, D. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Yu, S. C.
Song, Yu. Y.] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea
[Yu, S. C.
Song, Yu. Y.] Chungbuk Natl Univ, Phys Program BK21, Cheongju 361763, South Korea
[Patrin, G. S.
Khalyapin, D. L.
Marushchenko, D. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
BK21 Physics Program, Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Kim, P. D.; Ким, Пётр Дементьевич; Yu, S. C.; Patrin, G. S.; Патрин, Геннадий Семёнович; Song, Y. Y.; Turpanov, I. A.; Турпанов, Игорь Александрович; Khalyapin, D. L.; Marushchenko, D. A.; Марущенко, Дмитрий Анатольевич
}
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Heat capacity of a mixed-valence manganese oxide Pb(3)Mn(7)O(15) / N. V. Volkov [et al.] // J. Phys.: Condens. Matter. - 2008. - Vol. 20, Is. 44. - Ст. 445214, DOI 10.1088/0953-8984/20/44/445214. - Cited References: 11. - This study was supported by the INTAS (project No 061000013-9002), the Division of Physical Sciences of RAS, program `Spin-dependent Effects in Solids and Spintronics' (project No. 2.4.2 of SB RAS), the President of the Russian Federation, grant for Support of Leading Scientific Schools (project No. NSh-1011.2008.2), KRSF-RFBR `Enisey2007', project No. 07-02-96801-a, and the Siberian Branch of RAS, Integration project No. 3.7. . - ISSN 0953-8984

РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
Antiferromagnetism -- Crystallography -- Entropy -- Lead alloys -- Magnetic materials -- Magnetism -- Manganese -- Manganese compounds -- Powders -- Single crystals -- Specific heat -- Spin dynamics -- Antiferromagnetic orders -- Charge localizations -- Entropy losses -- Excess heat capacities -- Experimental datums -- Heat capacities -- Magnetic contributions -- Magnetic orders -- Magnetic states -- Magnetic subsystems -- Magnetic transitions -- Manganese oxides -- Nonmagnetic -- Spin systems -- Temperature curves -- Temperature dependences -- Temperature intervals -- Temperature ranges -- Manganese alloys
Аннотация: We present the results of a heat capacity study of Pb(3)Mn(7)O(15) single crystals with approximately equal concentrations of Mn(3+) and Mn(4+) ions. In the temperature interval between 210 and 260 K, an excess heat capacity of nonmagnetic origin, most likely associated with the process of charge localization, has been observed. Also, three pronounced anomalies corresponding to the changes in a magnetic subsystem of the crystal have been observed in the temperature dependence of the heat capacity. A broad hump near 150 K is related to the formation of a short-range magnetic order. This process of short-range ordering is rather prominent, considering the appreciable value of the entropy loss accompanying the change in the magnetic state. A clear lambda-shaped peak at 70 K marks the onset of a long-range antiferromagnetic order. Another anomalous contribution to the heat capacity of magnetic origin has been revealed at temperatures below 20 K. This contribution is associated with a magnetic transition of an unknown nature, which is also clearly evident in magnetization versus temperature curves. The total magnetic contribution to the entropy deduced from the actual experimental data over the entire temperature range is much smaller than is expected for a completely ordered Mn spin system in the crystal. We suggest several possible reasons that may account for this `missing' entropy.

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Держатели документа:
[Volkov, N. V.
Sablina, K. A.
Eremin, E. V.
Flerov, I. N.
Kartashev, A.] RAS, SB, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Volkov, N. V.
Flerov, I. N.] Siberian Fed Univ, Dept Phys, Krasnoyarsk 660041, Russia
[Boeni, P.] Tech Univ Munich, Dept Phys E21, D-85747 Garching, Germany
[Shah, V. R.] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[Rasch, J. C. E.
Boehm, M.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[Rasch, J. C. E.
Schefer, J.] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
[Rasch, J. C. E.
Schefer, J.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
ИФ СО РАН
Kirensky Institute of Physics, SB, RAS, 660036 Krasnoyarsk, Russian Federation
Department of Physics, Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Physics Department E21, Technical University of Munich, D-85747 Garching, Germany
Physics Department, Indiana University, Bloomington, IN 47405, United States
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

Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Sablina, K. A.; Саблина, Клара Александровна; Eremin, E. V.; Еремин, Евгений Владимирович; Boni, P.; Shah, V. R.; Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A.; Rasch, JCE; Boehm, M.; Schefer, J.
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Magnetic properties and nonmagnetic phases formation in (Fe/Si)(n) films / S. N. Varnakov [et al.] // J. Appl. Phys. - 2008. - Vol. 104, Is. 9. - Ст. 94703, DOI 10.1063/1.3005973. - Cited References: 23. - This work was supported by the Russian Academy of Science program "Spintronics," the complex integration project of the Siberian Branch of the Russian Academy of Science. 3.5, the Russian Foundation for Basic Research (Grant No. 07-03-00320), the "Ramon y Cajal" program, and Project No. MAT 2005/01272 of the Spanish Ministry of Education and Science. . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
FE/SI/FE TRILAYER FILMS
   GIANT MAGNETORESISTANCE
   ULTRAHIGH-VACUUM
   SUPERLATTICES
   MULTILAYERS
   EXCHANGE
Кл.слова (ненормированные):
Activation energy -- Integral equations -- Magnetic properties -- Magnetization -- Magnets -- Multilayers -- Rate constants -- Silicon -- Thermal evaporation -- Vacuum -- Vacuum evaporation -- Fe layers -- High temperatures -- Interface layers -- Irreversible behaviors -- Kinetic equations -- N films -- Nonmagnetic -- Nonmagnetic phases -- Prefactor -- Quantitative analysis -- Rate equations -- Synthetic procedures -- Temperature dependences -- Ultrahigh-vacuum systems -- Phase interfaces
Аннотация: The magnetization of Fe/Si multilayers, grown by thermal evaporation in an ultrahigh vacuum system, was investigated at high temperatures. Magnetization and its temperature dependence up to a high temperature of 800 K depend on individual Fe layer thickness d(Fe). This dependence is the result of the formation of an Fe-Si interface layer (nonmagnetic phase) during the synthetic procedure. The fraction of this Fe-Si nonmagnetic phase is estimated versus dFe. At temperatures higher than 400 K an irreversible decrease in the magnetization occurs. A quantitative analysis of this irreversible behavior is proposed in terms of an exponential diffusion-like kinetic equation for the reaction that produces the Fe-Si nonmagnetic phase. The coefficients of the rate equation are the activation energy E(a) and the prefactor D(0), which have been determined for different d(Fe). (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3005973]

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Держатели документа:
[Varnakov, S. N.
Komogortsev, S. V.
Ovchinnikov, S. G.] Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
[Varnakov, S. N.] Siberian Aerosp Univ, Krasnoyarsk 660014, Russia
[Bartolome, J.] Univ Zaragoza, Inst Ciencia Mat Aragon, Dept Fis Mat Condensada, CSIC, E-50009 Zaragoza, Spain
[Sese, J.] Univ Zaragoza, Inst Nanociencia Aragon, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Aerospace University, pr. im. gazety Krasnoyarskii rabochii 31, Krasnoyarsk 660014, Russian Federation
Instituto de Ciencia de Materiales de Aragon, Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
Instituto de Nanociencia de Aragon, Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain

Доп.точки доступа:
Varnakov, S. N.; Варнаков, Сергей Николаевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Bartolome, J.; Sese, J.
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The magnetic-field-driven effect of microwave detection in a manganite granular system / N. V. Volkov [et al.] // J. Phys. D. - 2008. - Vol. 41, Is. 1. - Ст. 15004, DOI 10.1088/0022-3727/41/1/015004. - Cited References: 24 . - ISSN 0022-3727

РУБ Physics, Applied
Рубрики:
IDENTICAL METALS
   TUNNEL-JUNCTIONS
   MAGNETORESISTANCE
   RECTIFICATION
   SPINTRONICS
   TEMPERATURE
   PEROVSKITES
Кл.слова (ненормированные):
Bias currents -- Curie temperature -- Electric power generation -- Granular materials -- Magnetic field effects -- Microwave irradiation -- Voltage measurement -- Direct current voltage -- Magnetic tunnel junctions -- Metal insulator metal junctions -- Nonmagnetic metals -- Manganites
Аннотация: We demonstrate the microwave detection effect in a granular La0.7Ca0.3MnO3 sample. Dc voltage generated by the sample in response to microwave irradiation below the Curie temperature is found to be dependent on the applied magnetic field. The magnetic field dependence of the dc voltage has a broad peak resembling an absorption line. The detection effect depends substantially on the magnetic history of the sample; however, identical measurement conditions provide reproducibility of the experimental results. The detected dc voltage increases linearly with microwave power and strongly depends on a bias current through the sample. According to the results of systematic measurements, there exist two contributions to a value of the detected output signal. The first is magneto-independent; it can be explained in the framework of a mechanism used traditionally for description of the rectification effect in metal-insulator-metal junctions with nonmagnetic metals. The other is magneto-dependent; it originates from the interplay between the spin-dependent current through magnetic tunnel junctions and spin dynamics of the grains, which form these junctions in the sample.

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

Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Eremin, E. V.; Еремин, Евгений Владимирович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Tsikalov, V. S.; Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич
}
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Drokin, N. A.
Properties of nonmagnetic-fe3o4 magnetic semiconductor heterostructure in metal-dielectric junctions / N. A. Drokin, S. G. Ovchinnikov // Zhurnal Tek. Fiz. - 1991. - Vol. 61, Is. 6. - P. 201-203. - Cited References: 5 . - ISSN 0044-4642

РУБ Physics, Applied

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Дрокин, Николай Александрович
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10.

Formation of nonmagnetic phases in Fe/Si interface / S. N. Varnakov [et al.] // Workshop "Trends in Nanomechanics and Nanoengineering" : book of abstracts / предс. сем. K. S. Aleksandrov ; зам. предс. сем.: G. S. Patrin, S. G. Ovchinnikov ; чл. лок. ком.: N. N. Kosyrev, A. S. Fedorov [et al]. - 2009. - P. 21

Материалы семинара

Доп.точки доступа:
Aleksandrov, K. S. \предс. сем.\; Александров, Кирилл Сергеевич; Patrin, G. S. \зам. предс. сем.\; Патрин, Геннадий Семёнович; Ovchinnikov, S. G. \зам. предс. сем.\; Овчинников, Сергей Геннадьевич; Kosyrev, N. N. \чл. лок. ком.\; Косырев, Николай Николаевич; Fedorov, A. S. \чл. лок. ком.\; Федоров, Александр Семенович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Ovchinnikov, S. G.; Bartolome, J.; Sese, J.; "Trends in Nanomechanics and Nanoengineering", workshop(2009 ; Aug. ; 24-28 ; Krasnoyarsk); Сибирский федеральный университет; Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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