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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Varnakov S. N., Komogortsev S. V., Ovchinnikov S. G., Bartolome J., Sese J.
Заглавие : Formation of nonmagnetic phases in Fe/Si interface
Коллективы : "Trends in Nanomechanics and Nanoengineering", workshop, Сибирский федеральный университет, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : 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
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Drokin N. A., Ovchinnikov S. G.
Заглавие : Properties of nonmagnetic-fe3o4 magnetic semiconductor heterostructure in metal-dielectric junctions
Место публикации : Zhurnal Tek. Fiz. - 1991. - Vol. 61, Is. 6. - P.201-203. - ISSN 0044-4642
Примечания : Cited References: 5
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Eremin E. V., Shaykhutdinov K. A., Tsikalov V. S., Petrov M. I., Balaev D. A., Semenov S. V.
Заглавие : The magnetic-field-driven effect of microwave detection in a manganite granular system
Место публикации : J. Phys. D. - 2008. - Vol. 41, Is. 1. - Ст.15004. - ISSN 0022-3727, DOI 10.1088/0022-3727/41/1/015004
Примечания : Cited References: 24
Предметные рубрики: IDENTICAL METALS
TUNNEL-JUNCTIONS
MAGNETORESISTANCE
RECTIFICATION
SPINTRONICS
TEMPERATURE
PEROVSKITES
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Boev N. M., Izotov A. V., Solovev P. N.
Заглавие : Domain structure and magnetization reversal in multilayer structures consisting of thin permalloy films separated with nonmagnetic interlayers
Коллективы : Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
Место публикации : Russ. Phys. J. - 2021. - Vol. 64, Is. 6. - P.1160-1167. - ISSN 1064-8887, DOI 10.1007/s11182-021-02436-w. - ISSN 1573-9228(eISSN)
Примечания : Cited References: 30. - This work was financially supported by the Ministry of Science and Higher Education under agreement No. 075-11-2019-054 November 22, 2019
Предметные рубрики: MICROMAGNETIC CALCULATION
MAGNETOMETER
SIMULATION
NOISE
Аннотация: Using numerical micromagnetic modeling, we have investigated the development of domain structure and magnetization reversal in multilayer thin-film structures. The permalloy (Ni80Fe20) magnetic layers had the inplane uniaxial and perpendicular magnetic anisotropy. We found that as the thickness of nonmagnetic interlayers decreases, the in-plane configuration of magnetic moments in the permalloy layers transforms from a single domain state to stripe domains, which is caused by the increase of magnetostatic interaction between layers. In structures with "thick" interlayers, even weak magnetostatic interaction enforces the neighboring single domain permalloy layers to have opposite orientations of magnetic moments. The saturation field of such samples increases linearly with the number of layers. By analyzing the dynamic characteristics of multilayers, we determined the optimum number of layers ensuring the maximum conversion efficiency of wideband microwave microstrip sensors of weak magnetic fields.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Chekanova L. A., Shabanova O. V., Shabanov A. V., Nemtsev I. V., Neznakhin D. S., Denisova E. A., Felk V. A., Mohov A. A., Iskhakov R. S.
Заглавие : Dipole-dipole interaction weakening in ensembles of cobalt microspheres with a nonmagnetic core
Место публикации : Phys. Solid State. - 2022. - Vol. 64, Is. 9. - P.1263-1268. - ISSN 10637834 (ISSN), DOI 10.21883/PSS.2022.09.54163.16HH. - ISSN 10906460 (eISSN)
Примечания : Cited References: 32. - The study was done with financial support from the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and the Krasnoyarsk Regional Fund of Science within scientific project No. 20-42-240001
Аннотация: Magnetic microspheres with nonmagnetic acrylic glass core were fabricated using electroless deposition. There are favorable conditions for magnetic flux closure within each particle. As a result, the dipole-dipole interaction in the powder of such microspheres is reduced drastically. This is the key difference between powders of magnetic microspheres and powders of full magnetic spherical particles witch behavior is significantly affected by the dipole-dipole interaction. The magnetic hysteresis in the cobalt microspheres with nonmagnetic core is significantly large then in the full cobalt particles produced using the same technique.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Varnakov S. N., Komogortsev S. V., Ovchinnikov S. G., Bartolomé J., Sese J.
Заглавие : Magnetic properties and nonmagnetic phases formation in nanostructured films (Fe/Si)n
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2008): June 20-25, 2008, Moscow : book of abstract. - 2008. - Ст.22PO-8-71. - p.323-324
Примечания : Библиогр.: 3. - 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 No3.5,
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ignatchenko V. A., Laletin O. N.
Заглавие : Magnetic structures and excitations in ferromagnetic-nonmagnetic metal multilayers
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2008): June 20-25, 2008, Moscow : book of abstract. - 2008. - Ст.24PO-7-12. - p.626-627
Примечания : Библиогр.: 1
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Петров, Михаил Иванович, Balaev D. A., Ospishchev S. V., Khrustalev B. P., Aleksandrov K. S.
Заглавие : 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
Место публикации : Physica C-Superconductivity and its Applications. - 1997. - Vol. 282, Is. PART 4. - P.2447-2448. - ISSN 0921-4534
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Shalaev M. I., Myslivets S. A., Slabko V. V., Nefedov I. S.
Заглавие : Enhancing coherent nonlinear-optical processes in nonmagnetic backward-wave materials
Коллективы : International conference on metamaterials, photonic crystals and plasmonics
Место публикации : Appl. Phys. A: Springer, 2012. - Vol. 109, Is. 4. - P.835-840. - ISSN 0947-8396, DOI 10.1007/s00339-012-7390-8
Примечания : 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.
Предметные 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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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Shalaev M. I., Myslivets S. A., Slabko V. V., Nefedov I. S.
Заглавие : Enhancing coherent nonlinear-optical processes in nonmagnetic backward-wave materials
Коллективы : International conference on metamaterials, photonic crystals and plasmonics
Место публикации : 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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