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1.


   
    Spin-glass magnetic ordering in CoMgGaO2BO3 ludwigite / N. B. Ivanova [et al.] // Физ. низких температур. - 2012. - Т. 38, Вып. 2. - С. 214-217. - Библиогр.: 13 назв. - This work was supported by the Russian Foundation for Basic Research (project No. 09-02-00171-a), the Federal Agency for Science and Innovation (Rosnauka) (project No. MK-5632.2010.2), the Physics Division of the Russian Academy of Sciences, the program "Strongly Correlated Electrons" (project 2.3.1). . - ISSN 0132-6414. - ISSN 1816-0328
   Перевод заглавия: Спин-стекольное магнитное упорядочение в людвигите CoMgGaO2BO3
Рубрики:
AC Magnetic susceptibility
   DC magnetization

   Field cooled

   Flux methods

   Frequency dependent

   Magnetic system

   Magnetic transitions

   Needle shape

   Parent compounds

   Spin-glasses freezing

   Temperature dependencies

   Unit-cell volume

   Zero-field-cooled

   Cobalt

   Cobalt compounds

   Freezing

   Glass

   Magnetic susceptibility

   Magnetism

   Single crystals

   X-ray diffraction

   Spin glass

Кл.слова (ненормированные):
Spin-glass freezing -- Transition metal ludwigites
Аннотация: The single crystal needle shape samples of diamagnetically diluted cobalt ludwigite CoMgGaO2BO3 have been grown by the flux method. The results of x-ray diffraction and both dc and ac magnetic measurements are presented. The unit cell volume undergoes a noticable growth under dilution from 328.31 Å3 for the parent compound Co3O2BO3 to 345.46 Å3 for CoMgGaO2BO3. The temperature of magnetic transition is considerably lower for the latter compound (25 K against 43 Kfor Co3O2BO3). The dc magnetization temperature dependencies undergo the splitting of field cooled and zero-field cooled regimes and the ac magnetic susceptibility temperature dependencies are frequency dependent pointing out a possible spin-glass freezing in the magnetic system.

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РИНЦ

Переводная версия Spin-glass magnetic ordering in CoMgGaO2BO3 ludwigite [Текст] / N. B. Ivanova [et al.] // Low Temp. Phys. : American Institute of Physics, 2012. - Vol. 38 No. 2.- P.172-174


Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Platunov, M. S.; Платунов, Михаил Сергеевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Kazak, N. V.; Казак, Наталья Валерьевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Vasiliev, A. D.; Васильев, Александр Дмитриевич
}
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2.


   
    Structural and magnetic resonance investigations of CuCr2S4 nanoclusters and nanocrystals / A. I. Pankrats [et al.] // J. Appl. Phys. - 2014. - Vol. 116, Is. 5. - Ст. 54302, DOI 10.1063/1.4891993. - Cited References: 26. - The work was supported by a Grant CRDF-SB RAS "New Nano-size and Layered Cu-containing Sulphides for Electronics" RUP1-7054-KR-11, N 16854. S.M.Z. acknowledges support from the Ministry of education and science of the Russian Federation (in the framework of the state assignment for SFU for 2014). . - ISSN 0021-8979. - ISSN 1089-7550
РУБ Physics, Applied
Рубрики:
SUPERPARAMAGNETIC RESONANCE
   NANOPARTICLES

   GLASS

   BIOMEDICINE

   PARTICLES

   SPINELS

Аннотация: Nanoclusters and nanocrystals of the room temperature magnetic spinel CuCr2S4 synthesized using a facile solution-based method have been examined by transmission electron microscopy, magnetic measurements, and magnetic resonance over a wide frequency range 9.6–80 GHz and at temperatures down to 4.2 K. Decreasing of the resonance field and broadening of the resonance lines below 50 K for both samples are due to the freezing of magnetic moments of nanocubes and nanocrystalline particles constituting nanoclusters. The effective fields of averaged magnetic anisotropy (HA)≌2.4 kOe are similar for both nanopowder samples as estimated from resonance measurements at T = 4.2 K. An additional blocking temperature T b ≅ 300 K appears in nanoclusters due to freezing of the magnetic moment of the entire cluster as a whole. Below this blocking temperature, the magnetic dipolar field acting in boundary areas of interacting constituent nanocrystals is responsible for the additional low-field resonance line observed in the resonance spectra of nanoclusters at X-band.

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Держатели документа:
SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Univ Alabama, MINT Ctr, Tuscaloosa, AL 35487 USA

Доп.точки доступа:
Pankrats, A. I.; Панкрац, Анатолий Иванович; Vorotynov, A. M.; Воротынов, Александр Михайлович; Tugarinov, V. I.; Тугаринов, Василий Иванович; Zharkov, S. M.; Жарков, Сергей Михайлович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Abramova, G. M.; Абрамова, Галина Михайловна; Zeer, G. M.; Ramasamy, K.; Gupta, A.; Grant CRDF-SB RAS "New Nano-size and Layered Cu-containing Sulphides for Electronics" [RUP1-7054-KR-11, 16854]; Ministry of education and science of the Russian Federation
}
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3.


    Vetrov, S. Ya.
    Spectral properties of one-dimensional photonic crystal with anisotropic defect layer of nanocomposite / S. Y. Vetrov, P. S. Pankin, I. V. Timofeev // Phys. Wave Phenom. - 2015. - Vol. 23, Is. 1. - P. 35-38, DOI 10.3103/S1541308X15010057. - Cited References:8. - This work was carried out within Research Government Contract No. 3.1276.2014/K for 2014 between the Ministry of Education and Science of the Russian Federation and Siberian Federal University and supported by the RFBR Project 14-02-31248, and a joint project of the Siberian Branch of the Russian Academy of Sciences and the Ministry of Science and Technology of Taiwan. . - ISSN 1541. - ISSN 1934-807X. -
РУБ Physics, Multidisciplinary
Рубрики:
GLASS
Аннотация: The spectral properties of a one-dimensional photonic crystal with a structure defect-anisotropic nanocomposite layer incorporated between two multilayer dielectric mirrors-have been theoretically investigated. Some specific features are revealed in the transmission spectrum of a photonic crystal. They are primarily due to the resonant behavior of the effective permittivity of nanocomposite and the strong dependence of this parameter on the volume fraction of nanoparticles in the composite.

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Держатели документа:
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; Ministry of Education and Science of the Russian Federation [3.1276.2014/K]; Siberian Federal University [3.1276.2014/K]; RFBR [14-02-31248]; Siberian Branch of the Russian Academy of SciencesMinistry of Science and Technology of Taiwan
}
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4.


    Vetrov, S. Ya.
    Peculiarities of spectral properties of a one-dimensional photonic crystal with an anisotropic defect layer of the nanocomposite with resonant dispersion / S. Y. Vetrov, P. S. Pankin, I. V. Timofeev // Quantum Electron. - 2014. - Vol. 44, Is. 9. - P. 881-884, DOI 10.1070/QE2014v044n09ABEH015473. - Cited References: 22. - The work was partially supported by the SB RAS programme (Grant Nos 43, 101 and 24.29); the Russian Foundation for Basic Research (Grant No. 14-02-31248); the Government Programme of the Ministry of Education and Science of the Russian Federation (Project No. 1276); RF President's Grants Council for the State Support to Young Russian Scientists (No. MK-250.2013.2); and NSCT-SB RAS joint project. . - ISSN 1063-7818. - ISSN 1468-4799
РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
MODE
   GLASS

Кл.слова (ненормированные):
transmission spectrum -- splitting of the defect mode -- plasmon resonance -- nanocomposite
Аннотация: We have studied the spectral properties of a one-dimensional photonic crystal with a structure defect that represents an anisotropic nanocomposite layer sandwiched between two multi-layer dielectric mirrors. The nanocomposite consists of metallic nanoscale inclusions of orientationally ordered spheroidal shape, dispersed in a transparent matrix, and is characterised by an effective resonant permittivity. Each of the two orthogonal polarisations of probe radiation corresponds to a particular plasmon resonant frequency of the nanocomposite. The problem of calculating the transmittance spectrum of the waves with s- and p-polarisations for such structures is solved. Spectral manifestation of splitting of the defect mode depending on the structure parameters and volumetric fraction of the nanospheroids is studied. The essential dependence of the position of maxima of the defect modes in the bandgap of the photonic crystal and their splitting on the incidence angle, polarisation, and the ratio of lengths of the polar and equatorial semi-axes of the spheroidal nanoparticles is shown.

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Публикация на русском языке Ветров, Степан Яковлевич. Особенности спектральных свойств одномерного фотонного кристалла с анизотропным дефектным слоем нанокомпозита, имеющего резонансную дисперсию [Текст] / С. Я. Ветров, П. С. Панкин, И. В. Тимофеев // Квант. электроника : Физический институт им. П.Н.Лебедева РАН, 2014. - Т. 44 № 9. - С. 881–884

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; SB RAS programme [43, 101, 24.29]; Russian Foundation for Basic Research [14-02-31248]; Government Programme of the Ministry of Education and Science of the Russian Federation [1276]; RF President's Grants Council [MK-250.2013.2]; NSCT-SB RAS joint project
}
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5.


   
    NMR applications for polymer composite materials moisture uptake investigation / V. M. Bouznik [et al.] // Appl. Magn. Reson. - 2016. - Vol. 47, Is. 3. - P. 321-334, DOI 10.1007/s00723-015-0748-2. - Cited References: 41. - This research was performed with the financial support of Russian Foundation for Basic Research (project no. 14-29-10178 ofi_m). . - ISSN 0937-9347
РУБ Physics, Atomic, Molecular & Chemical + Spectroscopy
Рубрики:
FIELD GRADIENT NMR
   REINFORCED EPOXY COMPOSITES

   WATER SELF-DIFFUSION

   TRANSPORT

   GLASS

   SYSTEM

   SPECTROSCOPY

   TEMPERATURE

   ABSORPTION

   ADHESIVE

Аннотация: The 1H nuclear magnetic resonance (NMR) spectroscopy, NMR imaging, and pulsed field gradient NMR (PFG NMR) were applied for comparative study of moisture–polymer composite materials (PCM) interaction. The water uptake in PCM reinforced by aramid and carbon fibers was measured by NMR spectroscopy techniques. The aramid fiber-reinforced PCM absorbs water more intensively compared with PCM reinforced by carbon fiber, but both of them are retaining water inside of pores without formation of chemical bonds. Using NMR imaging the spatial distribution of water absorbed was visualized; preferable water pathways and influence of surface treatment on water-resistant properties were revealed. It was found that the surface rough treatment sufficiently improves the water absorption, but penetration of water molecules is still occurring only through the surfaces and it happens within a thin layer. PFG NMR technique revealed influence of pore structure on moisture–PCM interaction; it was found that additionally to strong hydrophobic properties of carbon fiber, the smaller total volume of pores sufficiently decrease the water uptake. Results achieved in this work demonstrate efficiency of NMR methods applied all together for investigation of PCM, and information obtained is practically important when designing advanced PCM with required properties. © 2016, Springer-Verlag Wien.

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Держатели документа:
Institute of Problems of Chemical Physics RAS, Chernogolovka, Russian Federation
All-Russian Scientific Research Institute of Aviation Materials, Moscow, Russian Federation
Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russian Federation
Science Center in Chernogolovka of the Russian Academy of Sciences, Chernogolovka, Russian Federation

Доп.точки доступа:
Bouznik, V. M.; Morozov, E. V.; Морозов, Евгений Владимирович; Avilova, I. A.; Volkov, V. I.
}
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6.


   
    Microstructure and Magnetooptics of Silicon Oxide with Implanted Nickel Nanoparticles / I. S. Edel'man [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 113, Is. 6. - P. 1040-1049, DOI 10.1134/S1063776111160035. - Cited References: 44. - This work was supported by the Russian Foundation for Basic Research (project nos. 11-02-00972, 11-02-90420, 11-02-91341) and the program Research and Scientific-Pedagogical Brainpower of Innovated Russia (State contract 02.740.11.0797). . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
SIMPLE METAL-CLUSTERS
   OPTICAL-PROPERTIES

   ION-IMPLANTATION

   FARADAY-ROTATION

   KERR SPECTRA

   GLASS

   RESONANCE

   PHYSICS

   ENERGY

   FE

Кл.слова (ненормированные):
Disperse structure -- Effective medium model -- Implanted samples -- Irradiation dose -- Magnetic circular dichroisms -- Magnetic Nickel -- Magneto-optical Faraday effect -- Magneto-optical measurements -- matrix -- Metal nanoparticles -- Metallic nickel -- Nickel nanoparticles -- Nickel particles -- Optical range -- Spectral dependences -- Surface plasma resonances -- Tensor components -- Thin near-surface layers -- Amorphous silicon -- Crystal microstructure -- Dichroism -- Faraday effect -- Ion implantation -- Magnetoplasma -- Metallic compounds -- Nanomagnetics -- Nanoparticles -- Nickel -- Silicon compounds -- Silicon oxides -- Spectroscopy -- Tensors -- Transmission electron microscopy -- Nickel oxide
Аннотация: Metallic nickel nanoparticles of various sizes are formed in a thin near-surface layer in an amorphous SiO2 matrix during 40-keV Ni+ ion implantation at a dose of (0.25-1.0) x 10(17) ions/cm(2). The micro-structure of the irradiated layer and the crystal structure, morphology, and sizes of nickel particles formed at various irradiation doses are studied by transmission electron microscopy and electron diffraction. The magnetooptical Faraday effect and the magnetic circular dichroism in an ensemble of nickel nanoparticles are studied in the optical range. The permittivity (epsilon) over cap tensor components are calculated for the implanted samples using an effective medium model with allowance for the results of magnetooptical measurements. The spectral dependences of the tensor (epsilon) over cap components are found to be strongly different from those of a continuous metallic nickel film. These differences are related to a disperse structure of the magnetic nickel phase and to a surface plasma resonance in the metal nanoparticles.

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Держатели документа:
[Edel'man, I. S.
Petrov, D. A.
Ivantsov, R. D.
Zharkov, S. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Zharkov, S. M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Khaibullin, R. I.
Valeev, V. F.
Nuzhdin, V. I.
Stepanov, A. L.] Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia
[Stepanov, A. L.] Kazan Volga Reg Fed Univ, Kazan 420018, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, 660041, Russian Federation
Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirskii trakt 10/7, Kazan, 420029, Russian Federation
Kazan (Volga Region), Federal University, ul. Kremlevskaya 18, Kazan, 420018, Russian Federation

Доп.точки доступа:
Edel'man, I. S.; Edelman, I. S.; Petrov, D. A.; Петров, Дмитрий Анатольевич; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Khaibullin, R. I.; Valeev, V. F.; Nuzhdin, V. I.; Stepanov, A. L.
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