Главная
Авторизация
Фамилия
Пароль
 

Базы данных


Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Область поиска
в найденном
Формат представления найденных документов:
полныйинформационныйкраткий
Отсортировать найденные документы по:
авторузаглавиюгоду изданиятипу документа
Поисковый запрос: (<.>K=Ferromagnets<.>)
Общее количество найденных документов : 58
Показаны документы с 1 по 10
 1-10    11-20   21-30   31-40   41-50   51-58 
1.


   
    Spherical magnetic nanoparticles fabricated by laser target evaporation / A. P. Safronov [et al.] // AIP Adv. - 2013. - Vol. 3, Is. 5. - Ст. 052135. - P. , DOI 10.1063/1.4808368. - Cited References: 47. - This work was supported by the RFBR 10-02-96015 and 12-02-31385 projects, UrFU 215, Spanish MEC MAT2011-27573-C04 grants, Universidad del Pais Vasco UPV/EHU under UFI11/53 action and Physics Department of the University of Maryland visiting grant. Selected measurements were performed at SGIker service of UPV-EHU. We thank O.M. Samatov, Dr. A.M. Murzakayev, Dr. I. Orue, and A.A. Svalova for special support. . - ISSN 2158-3226
РУБ Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
IRON-OXIDE NANOPOWDERS
   CO2-LASER EVAPORATION

   FE3O4 NANOPARTICLES

   FINITE-SIZE

   TEMPERATURE

   FERROMAGNETS

   FERROFLUIDS

   DEPENDENCE

   EXPLOSION

   PARTICLES

Аннотация: Magnetic nanoparticles of iron oxide (MNPs) were prepared by the laser target evaporation technique (LTE). The main focus was on the fabrication of de-aggregated spherical maghemite MNPs with a narrow size distribution and enhanced effective magnetization. X-ray diffraction, transmission electron microscopy, magnetization and microwave absorption measurements were comparatively analyzed. The shape of the MNPs (mean diameter of 9 nm) was very close to being spherical. The lattice constant of the crystalline phase was substantially smaller than that of stoichiometric magnetite but larger than the lattice constant of maghemite. High value of M-s up to 300 K was established. The 300 K ferromagnetic resonance signal is a single line located at a field expected from spherical magnetic particles with negligible magnetic anisotropy. The maximum obtained concentration of water based ferrofluid was as high as 10g/l of magnetic material. In order to understand the temperature and field dependence of MNPs magnetization, we invoke the core-shell model. The nanoparticles is said to have a ferrimagnetic core (roughly 70 percent of the caliper size) while the shell consists of surface layers in which the spins are frozen having no long range magnetic order. The core-shell interactions were estimated in frame of random anisotropy model. The obtained assembly of de-aggregated nanoparticles is an example of magnetic nanofluid stable under ambient conditions even without an electrostatic stabilizer. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

Смотреть статью,
WoS,
WOS,
Читать в сети ИФ
Держатели документа:
RAS, Inst Electrophys, Ekaterinburg 620016, Russia
Urals Fed Univ, Ekaterinburg 620000, Russia
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Basque Country UPV EHU, Dept Elect & Elect, Bilbao 48080, Spain
Univ Basque Country UPV EHU, SGIker, Bilbao 48080, Spain
Univ Maryland, Dept Phys, FMR Grp, College Pk, MD 20742 USA

Доп.точки доступа:
Safronov, A. P.; Beketov, I. V.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Kurlyandskaya, G. V.; Medvedev, A. I.; Leiman, D. V.; Larranaga, A.; Bhagat, S. M.
}
Найти похожие
2.


   
    Magnetic anisotropy and order parameter in nanostructured CoPt particles / S. V. Komogortsev [et al.] // Appl. Phys. Lett. - 2013. - Vol. 103, Is. 15. - Ст. 152404. - P. , DOI 10.1063/1.4824973. - Cited References: 36. - The authors are grateful to Dr. A. V. Zadesenets for synthesis of CoPt complex precursor and Dr. A. S. Bogomyakov for assistance in magnetic measurements. The work was supported by RFBR (Grant Nos. 11-03-00168-a and 12-02-00943-a), Interdisciplinary integration of fundamental research of SB RAS (2012-2014) project No. 64, and grant of the President of the Russian Federation (No. MK-1934.2013.3). . - ISSN 0003-6951
РУБ Physics, Applied
Рубрики:
FEPT THIN-FILMS
   REMANENT MAGNETIZATION

   UNIAXIAL ANISOTROPIES

   FINE PARTICLES

   NANOPARTICLES

   FERROMAGNETS

   PHASE

Аннотация: The correlation of magnetic anisotropy energy with order parameter in the crystallites of CoPt nanostructured particles prepared by thermal decomposition and further annealing has been studied by investigation of the approach magnetization to saturation curves and x-ray powder diffraction pattern profiles. It is shown that magnetic anisotropy energy value in partially ordered CoPt crystallite could be described as an intermediate case between two extremes, corresponding to either single or several c-domains of L1(0) phase in crystallite. (C) 2013 AIP Publishing LLC.

Смотреть статью,
WOS,
Читать в сети ИФ
Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
SB RAS, Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Zimin, A. A.; Зимин, А. А.; Filatov, E. Y.; Korenev, S. V.; Shubin, Y. V.; Chizhik, N. A.; Yurkin, G.Yu.; Юркин, Глеб Юрьевич; Eremin, E. V.; Еремин, Евгений Владимирович; RFBR [11-03-00168-a, 12-02-00943-a]; Interdisciplinary integration of fundamental research of SB RAS [64]; Russian Federation [MK-1934.2013.3]
}
Найти похожие
3.


   
    Effect of ball milling and dynamic compaction on magnetic properties of Al2O3/Co(P) composite particles / E. A. Denisova [et al.] // J. Appl. Phys. - 2014. - Vol. 115, Is. 17. - Ст. 17B530, DOI 10.1063/1.4869158. - Cited References: 18. - This work was partially supported by Russian Foundation of Basic Research 13-03-00476-a. . - ISSN 0021-8979. - ISSN 1089-7550
РУБ Physics, Applied
Рубрики:
MECHANOCHEMICAL SYNTHESIS
   MECHANICAL-PROPERTIES

   NANOCOMPOSITE POWDER

   ALLOYS

   NANOCRYSTALLINE

   MICROSTRUCTURE

   FERROMAGNETS

Аннотация: The evolution of the magnetic properties of composite Al2O3/Co(P) particles during ball milling and dynamic compaction is investigated. To prepare starting composite particles, the Al2O3 granules were coated with a Co95P5 shell by electroless plating. The magnetic and structural properties of the composite particles are characterized by scanning electron microscopy, X-ray diffraction, and the use of the Physical Property Measurement System. The use of composite core-shell particles as starting powder for mechanoactivation allows to decrease treatment duration to 1 h and to produce a more homogeneous bulk sample than in the case of the mixture of Co and Al2O3 powders. The magnetic properties of the milled composite particles are correlated with changes in the microstructure. Reduction in grain size of Co during milling leads to an increase of the volume fraction of superparamagnetic particles and to a decrease of the saturation magnetization. The local magnetic anisotropy field depends on the amount of hcp-Co phase in sample. The anisotropy field value decreases from 8.4 kOe to 3.8 kOe with an increase in milling duration up to 75 min. The regimes of dynamic compaction were selected so that the magnetic characteristics-saturation magnetization and coercive field-remained unchanged. (C) 2014 AIP Publishing LLC.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Kirensky Inst Phys SB RAS, Krasnoyarsk, Russia
Krasnoyarsk Inst Railways Transport, Krasnoyarsk, Russia
Inst Sicherheitsforsch & Reaktortech, D-52425 Julich, Germany
Krasnoyarsk Sci Ctr SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Kuzovnikova, L. A.; Кузовникова, Людмила Александровна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Bukaemskiy, A. A.; Eremin, E. V.; Еремин, Евгений Владимирович; Nemtsev, I. V.; Немцев, Иван Васильевич; Russian Foundation of Basic Research [13-03-00476-a]
}
Найти похожие
4.


    Киренский, Леонид Васильевич.
    О процессах намагничивания ферромагнетиков [Текст] / Л. В. Киренский, М. К. Савченко, И. Ф. Дегтярев // Журн. эксперим. и теор. физ. - 1959. - Т. 37, вып. 3. - С. 616-619. - Библиогр.: 7 назв. - Phys. Abstr. - 1960. - Vol. 63, 10145
   Перевод заглавия: Magnetization process in ferromagnets

Смотреть статью
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Савченко, Михаил Кириллович; Savchenko, M. K.; Дегтярев, И. Ф.; Kirensky, L. V.
}
Найти похожие
5.


   
    The manifestations of the two-dimensional magnetic correlations in the nanocrystalline ribbons Fe64CO21B15 / R. S. Iskhakov [et al.] // J. Magn. Magn. Mater. - 2015. - Vol. 374. - P. 423-426, DOI 10.1016/j.jmmm.2014.08.078. - Cited References: 42 . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Проявления двумерных магнитных корреляций в нанокристаллических лентах Fe64Co21B15
РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
GRAIN-SIZE DEPENDENCE
   RANDOM ANISOTROPY

   AMORPHOUS-ALLOYS

   COERCIVE FORCE

   FERROMAGNETS

   FILMS

   SATURATION

   Fe

   MICROSTRUCTURE

   EVOLUTION

Кл.слова (ненормированные):
Magnetic correlations -- Nanoclystalline alloys -- Random magnetic anisotropy -- Coercivity
Аннотация: We report and discuss the grain size dependence of the coercivity and approach magnetization to saturation in the FeCoB ribbons. Instead of expected three-dimensional magnetic correlations for 20 mu m thick ribbon with grain size about 10 nm, the observed behavior could be attributed to the two-dimensional stochastic magnetic domains and two dimensional magnetization ripple. (C) 2014 Elsevier B.V. All rights reserved.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
RAS, Kirensky Inst Phys, SB, Krasnoyarsk, Russia
Irkutsk State Univ, Irkutsk 664003, Russia
Siberian State Technol Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Balaev, A. D.; Балаев, Александр Дмитриевич; Gavriliuk, A. A.; Гаврилюк, Алексей Александрович
}
Найти похожие
6.


   
    On the low-frequency resonance of magnetic vortices in micro- and nanodots / P. D. Kim [et al.] // Phys. Solid State. - 2015. - Vol. 57, Is. 1. - P. 30-37, DOI 10.1134/S1063783415010151. - Cited References:57. - This study was supported by the Siberian Branch of the Russian Academyof Sciences within the framework of the Interdisciplinary IntegrationProject No. 26 "Ferromagnetic Film Nanodots: Physics of Phenomena andApplications" (2012-2014). . - ISSN 1063. - ISSN 1090-6460. -
РУБ Physics, Condensed Matter
Рубрики:
EASY-PLANE FERROMAGNETS
   VORTEX CORE

   MAGNON MODES

   DYNAMICS

   FIELD

Аннотация: The resonance motion of the magnetization of thin cylindrical and parallelepiped micro- and nanodots has been studied theoretically and experimentally. Analytical expressions for the external-field dependence of the resonance frequency of the vortex-structure oscillations have been derived taking into account the inertial and damping coefficients. The external-field dependence of the damping parameter has been found theoretically. The influence of the effective mass of a magnetic vortex on its low-frequency dynamics has been discussed.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ

Публикация на русском языке О низкочастотном резонансе магнитных вихрей в микро- и нанопятнах [Текст] / П. Д. Ким [и др.] // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2015. - Т. 57 Вып. 1. - С. 29-36

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Pedag Univ, Krasnoyarsk 660049, Russia.
Krasnoyarsk State Med Univ, Krasnoyarsk 660022, Russia.
Russian Acad Sci, Siberian Branch, Rzhanov Inst Semicond Phys, Novosibirsk 630090, Russia.

Доп.точки доступа:
Kim, P. D.; Ким, Пётр Дементьевич; Orlov, V. A.; Prokopenko, V. S.; Zamai, S. S.; Замай, С. С.; Prints, V. Ya; Rudenko, R. Y.; Руденко, Роман Юрьевич; Rudenko, T. V.; Руденко, Т. В.; Siberian Branch of the Russian Academy of Sciences [26]
}
Найти похожие
7.


   
    The exchange interaction effects on magnetic properties of the nanostructured CoPt particles / S. V. Komogortsev [et al.] // J. Magn. Magn. Mater. - 2016. - Vol. 401. - P. 236-241, DOI 10.1016/j.jmmm.2015.10.041. - Cited References: 55. - The work has been partially supported by RFBR Grants 15-08-06673, 14-03-00411, 14-03-00129, 15-42-0417115 and it is partly performed in Siberian Federal University within the state contract of the Russian Federation Ministry of Education and Science for 2014-2016 (project number 1792) . - ISSN 0304-8853
   Перевод заглавия: Влияния обменного взаимодействия на магнитные свойства наноструктурированных частиц CoPt
РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
CLUSTER BEAM DEPOSITION
   BULK MAGNETS

   NANOCRYSTALLINE FERROMAGNETS

   REMANENCE ENHANCEMENT

   THIN-FILMS

   COERCIVITY

   MICROSTRUCTURE

   NANOPARTICLES

   IRON

   SYSTEM

Аннотация: Various manifestations of the exchange interaction effects in magnetization curves of the CoPt nanostructured particles are demonstrated and discussed. The inter-grain exchange constant A in the sponge-like agglomerates of crystallites is estimated as A=(7±1) pJ/m from the approach magnetization to saturation curves that is in good agreement with A=(6.6±0.5) pJ/m obtained from Bloch T 3/2 law. The fractal dimensionality of the exchange coupled crystallite system in the porous media of the disordered CoPt alloy d=(2.60±0.18) was estimated from the approach magnetization to saturation curve. Coercive force decreases with temperature as Hc~T 3/2 which is assumed to be a consequence of the magnetic anisotropy energy reduction due to the thermal spin wave excitations in the investigated CoPt particles. © 2015 Elsevier B.V. All rightsreserved.
Демонстрируются и обсуждаются различные проявления эффектов обменного взаимодействия в кривых намагниченности наноструктуированных частиц CoPt. Межзеренная обменная константа А в агломератах губчатой структуры кристаллитов оценивается как /A/=(7±1) pJ/m из кривых приближения намагниченности к насыщению, это значение находится в хорошем согласии с /A/=(6.6±0.5) pJ/m, полученным из закона /T/. /2 Блоха. Размерность фрактала обменно-соединенных кристаллических систем в пористой среды неупорядоченного сплава CoPt /d/=(2.60±0.18) оценивалась из кривых приближения намагниченности к насыщению. Коэрцитивная сила уменьшается с температурой по закону /H_c /~/T/. /2 , который, как предполагается, есть следствие уменьшения энергии магнитной анизотропии из-за теплового возбуждения спиновых волн в изучаемых частицах CoPt.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Nikolaev Institute of Inorganic Chemistry, SB RAS, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Zimin, A. A.; Зимин, А. А.; Filatov, E. Y.; Korenev, S. V.; Shubin, Yu. V.; Chizhik, N. A.; Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Eremin, E. V.; Еремин, Евгений Владимирович
}
Найти похожие
8.


    Ovchinnikov, S. G.
    Different physical mechanism of the UFM in ferromagnets with itinerant and localized electrons / S. G. Ovchinnikov, A. Kimel // Ultrafast Magnetism Conference (UMC2015). - 2015


Доп.точки доступа:
Kimel , A.; Ultrafast Magnetism Conference(2015 ; okt. ; 19-23 ; Nijmengen, Netherlands)
}
Найти похожие
9.


   
    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]

WOS,
Scopus,
Читать в сети ИФ
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
}
Найти похожие
10.


   
    Thermal expansion, phase diagrams and barocaloric effects in (NH4)(2)NbOF5 / M. . Gorev [et al.] // J. Phys.: Condens. Matter. - 2010. - Vol. 22, Is. 18. - Ст. 185901, DOI 10.1088/0953-8984/22/18/185901. - Cited References: 17. - This work was supported in part by the Krasnoyarsk Regional Foundation for Support of Scientific and Scientific-Technological Investigations and RFBR in the framework of project 'Siberia' (Grant No. 09-02-98001), and the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools (project No. Nsh-1011.2008.2). . - ISSN 0953-8984
РУБ Physics, Condensed Matter
Рубрики:
CRYSTAL-STRUCTURE
   SOLID-STATE

   OXYFLUORIDE

   TRANSITION

   ANION

Кл.слова (ненормированные):
Antiferromagnets -- Ferromagnets -- Heat capacities -- High stress -- Intermediate phase -- Pippard relations -- Structural phase transition -- Transition temperature -- Uniaxial pressures -- Financial data processing -- Phase diagrams -- Phase transitions -- Thermal stress -- Tools -- Thermal expansion
Аннотация: The thermal expansion along the a, b and c axes of a (NH4)(2)NbOF5 crystal was measured from 120 to 300 K. Anomalies of alpha(T) associated with previously reported phase transitions Cmc2(1) -> C-2 -> I a were observed along all directions at T-1 = 259.3 K and T-2 = 220.5 K. The analysis of thermal expansion and heat capacity in the frame of the Pippard relations has permitted us to determine the uniaxial pressure derivatives of the transition temperatures dT/d sigma(i). The T-sigma(i) phase diagrams have shown a tendency for the intermediate phase to disappear at high stress along the b and c axes. Intensive and extensive barocaloric effects near the structural phase transitions were found to be comparable with the caloric parameters of some ferroelectrics, ferromagnets and antiferromagnets.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
[Gorev, Michail
Bogdanov, Evgeny
Flerov, Igor] Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Gorev, Michail
Flerov, Igor] Siberian Fed Univ, Inst Engn Phys, Krasnoyarsk 660041, Russia
[Laptash, Nataly] Russian Acad Sci, Far Eastern Div, Inst Chem, Vladivostok 690022, Russia
ИФ СО РАН
LVKirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok 660036, Russian Federation
Institute of Engineering Physics, Siberian Federal University, av. Svobodny 79, Krasnoyarsk 660041, Russian Federation
Institute of Chemistry, Far Eastern Division, Russian Academy of Sciences, Vladivostok 690022, Russian Federation

Доп.точки доступа:
Gorev, M.; Bogdanov, E. V.; Богданов, Евгений Витальевич; Flerov, I. N.; Флёров, Игорь Николаевич; Laptash, N. M.
}
Найти похожие
 1-10    11-20   21-30   31-40   41-50   51-58 
 

Другие библиотеки

© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)