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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Iskhakov R. S., Kuzovnikova L. A., Komogortsev S. V., Denisova E. A., Balaev A. D., Mal'tsev V. K., Bondarenko G. N.
Заглавие : Accelerated mechanical alloying of mutually insoluble metals: Co-Cu system
Место публикации : Tech. Phys. Lett.: AMER INST PHYSICS, 2004. - Vol. 30, Is. 1. - P60-63. - ISSN 1063-7850, DOI 10.1134/1.1646717
Примечания : Cited References: 11
Предметные рубрики: SOLID-SOLUTIONS
P ALLOYS
POWDERS
Аннотация: We propose a new method for accelerating the process of mechanical alloying in the Co-Cu system possessing positive enthalpy of mixing and exhibiting no mutual solubility of components under equilibrium conditions. For this purpose, highly disperse powders of composite particles representing a Co-P amorphous alloy core covered with a nanocrystalline copper shell were prepared by chemical deposition. These composite powders were mechanically alloyed by processing in a ball mill. Investigation of the atomic structure and magnetic properties of the composite powders upon milling showed that the formation of supersaturated Co-Cu solid solutions under such conditions requires a much shorter milling time as compared to that for the conventional mechanical alloying processes. (C) 2004 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chekanova L. A., Denisova E. A., Goncharova O. A., Komogortsev S. V., Iskhakov R. S.
Заглавие : Analysis of phase composition of Co-P alloy powders using magnetometric data
Место публикации : Phys. Metals & Metallogr. - 2013. - Vol. 114. Is. 2. - P.122-128. - DOI 10.1134/S0031918X1302004X
Аннотация: A new method for the quantitative estimate of the phase composition of a multiphase ferromagnetic alloy is suggested that is based on measuring the temperature and field dependences of the magnetization. The phase composition of ultrafine Co-P powders is characterized. Phase diagrams of nonequilibrium Co-P solid solutions are constructed on particle size, i.e., the phosphorus concentration coordinates.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Kuzovnikova L. A., Iskhakov R. S., Kuzovnikov A., Lepeshev A. A., Nemtsev I. V., Saunin V. N., Telegin S. V., Bondarenko G. N., Mal'tsev V. K.
Заглавие : Bulk CoNiFe-SiB amorphous and nanostructured alloys produced by plasma spray deposition and dynamic compaction: formation of soft magnetic properties
Коллективы : International Conference on Magnetism
Место публикации : Phys. Procedia/ International Conference on Magnetism (20 ; 2015 ; Jul ; 5-10 ; Barselona, Spain): Elsevier, 2015. - Vol. 75. - P.1238-1243. - ISSN 1875-3892, DOI 10.1016/j.phpro.2015.12.136
Примечания : Cited References: 9. - This work was supported by Russian Foundation of Basic Research 15-08-06673 and RFBR-KRFS 15-42-04171
Ключевые слова (''Своб.индексиров.''): bulk nanostructured materials--dynamic compaction--plasma spray deposition--magnetic properties
Аннотация: The bulk nanostructured Co58Ni10Fe5B16Si11 alloys were prepared by dynamic compaction and plasma spray deposition techniques. The investigation of structure and magnetic properties of bulk samples was carried out by X-ray diffraction, electron microscopy and correlation magnetometry. The bulk samples produced by both methods can be characterized as a heterophase system. The highest value of permeability 20 · 103 for plasma spraying coating is achieved when volume fraction of nanocrystalline phase with Curie temperature Tc ∼ 640 K is increased to 30%. The magnetic characteristics, such as the saturation magnetization, the Bloch constant, the local magnetic anisotropy field, the ferromagnetic resonance linewidth, and the coercivity remain unchanged after both compaction techniques. It was shown that the plasma spraying method allows to obtain bulk magnetically soft materials with magnetic parameters that are not inferior to the characteristics of a thermally treated rapidly quenched ribbon with the same composition.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisova E. A., Kuzovnikova L. A., Kuzovnikov A. A., Iskhakov R. S., Lepeshev A. A., Nemtsev I. V., Saunin V. N., Telegin S. V.
Заглавие : Bulk CoNiFe-SiB amorphous and nanostructured alloys produced by plasma spray deposition and dynamic compaction: formation of soft magnetic properties
Коллективы : International Conference on Magnetism
Место публикации : 20th Int. Conf. on Magnetism (ICM-2015): book of abstracts. - 2015. - Ст.TU.H-P55
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kuzovnikova L. A., Denisova E. A., Iskhakov R. S., Kuzovnikov A. A., Nemtsev I. V., Mal'tsev V. K.
Заглавие : Bulk nanostructured materials produced by dynamic compaction of composite Co-P/Cu and Al2O3/Co-P core-shell particles
Коллективы : Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.P10.19. - P.487. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : This work was supported by Russian Foundation of Basic Research 15-08-06673, 16-03-00256, 16-03-00969 and RFBR-KRFS 15-42-04171
Ключевые слова (''Своб.индексиров.''): dynamic compaction--nanostructured materials--magnetic properties
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kuzovnikova L. A., Denisova E. A., Komogortsev S. V., Balaev A. D., Mal'tsev V. K., Bondarenko G.N.
Заглавие : Co-Cu Alloys synthesized by mechanical alloying from the powder precursors with excess enthalpy
Коллективы : "Physics, Chemistry and Application of nanostructures", International conference
Место публикации : Physics, Chemistry and Application of nanostructures: Proceedings of the International conference "Nanomeeting - 2009" : Reviews and short notes/ ред.: V. E. Borisenko, S. V. Gaponenko, V. S. Gurin. - 2009. - P.272-275
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Patrusheva T. N., Balaev D. A., Denisova E. A., Ponomarenko I. V.
Заглавие : Cobalt ferrite nanoparticles in a mesoporous silicon dioxide matrix
Коллективы : Development of the Scientific Potential of Higher Education [RNP. 2.1.1/2584]; Krasnoyarsk Regional Science Foundation; Russian Foundation for Basic Research [r-Enisei-a 03-07-96803, 09-02-98002-r_sibir'_a]
Место публикации : Tech. Phys. Lett. - 2009. - Vol. 35, Is. 10. - P.882-884. - ISSN 1063-7850, DOI 10.1134/S1063785009100022
Примечания : Cited References: 10. - This study was supported in part by the Federal Program "Development of the Scientific Potential of Higher Education" (project no. RNP. 2.1.1/2584) and jointly by the Krasnoyarsk Regional Science Foundation and the Russian Foundation for Basic Research (project nos. r-Enisei-a 03-07-96803 and 09-02-98002-r_sibir'_a).
Предметные рубрики: MAGNETIC-PROPERTIES
NANOSIZED COFE2O4
ANISOTROPY
POWDERS
CURVES
Аннотация: We have studied magnetic nanoparticles of cobalt ferrite obtained by the extraction-pyrolysis method in a mesoporous silicon dioxide (MSM-41) molecular sieve matrix. The X-ray diffraction data show evidence for the formation of CoFe(2)O(4) particles with a coherent scattering domain size of similar to 40 nm. Measurements of the magnetization curves showed that powders consisting of these nanoparticles are magnetically hard materials with a coercive field of H (c)(4.2 K) = 9.0 kOe and H (c)(300 K) = 1.8 kOe and a reduced remanent magnetization of M (r)/M (s)(4.2 K) = 0.83 and M (r)/M (s)(300 K) = 0.49. The shape of the low-temperature (4.2 K) magnetization curves is adequately described in terms of the Stoner-Wohlfarth model for randomly oriented single-domain particles with a cubic magnetic anisotropy.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Kuzovnikova L. A., Iskhakov R. S., Kuzovnikov A. A., Nemtsev I. V., Mal'tsev V. K.
Заглавие : Cobalt-based bulk nanostructured materials prepared via the dynamic compacting of core–shell composite particles
Место публикации : Bull. Russ. Acad. Sci. Phys.: Allerton Press, 2016. - Vol. 80, Is. 11. - P.1377-1380. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873816110198
Примечания : Cited References: 12. - This work was supported by the Russian Foundation for Basic Research, project nos. 15-08-06673, 16-03-00969, and RFBR and KRFS 15-42-04171.
Ключевые слова (''Своб.индексиров.''): composite materials--bulk nanostructured materials--chemical deposition--cobalt-based--composite particles--dynamic compaction--magnetic characteristic--nano-structured--structural and magnetic characteristics--powders
Аннотация: Bulk nanostructured Co–P/Cu and Al2O3/Co–P composites are fabricated via dynamic compaction. The initial core–shell particles are synthesized by means of chemical deposition. Structural and magnetic characteristics of the composites are investigated. It is shown that the use of composite particles allows homogeneous compacts with the structure and magnetic characteristics of initial powders to be obtained. © 2016, Allerton Press, Inc.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Shepeta N.A., Kuzovnikova L. A.
Заглавие : Comparison of the microstructure and magnetic properties of films and composite powders based on 3-d metal
Коллективы : International Baltic Conference on Magnetism: focus on nanobiomedicine and smart materials, Балтийский федеральный университет им. И. Канта
Место публикации : 4th International Baltic Conference on Magnetism (IBCM 2021): Book of abstracts. - 2021. - P.193
Примечания : Cited References: 1. - The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-43-240003.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chekanova L. A., Shepeta N. A., Denisova E. A., Iskhakov R. S., Kuzovnikova L. A., Nemtsev I. V.
Заглавие : Comparison of the microstructure and magnetic properties of films and composite powders based on 3-D metal
Место публикации : J. Supercond. Novel Magn. - 2022. - Vol. 35, Is. 11. - P.3241-3247. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-022-06339-w
Примечания : Cited References: 19. - This work was funded by the Russian Foundation for Basic Research, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20–43-240003
Аннотация: The comparison between the magnetic properties of materials with different curvature and spatial distribution of nanograins, such as particles (3D spatial distribution) and multilayer films (2D) was carried out. Functionally graded Co(P)/Ni(P) and Co(P)/CoNi(P) specimens have been fabricated by electroless deposition. The magnetic and structural properties are characterized by electron microscopy, X-ray diffraction, ferromagnetic resonance spectroscopy, and vibrating sample magnetometer. It was demonstrated that the interaction between the Ni(P) core and Co(P) shell of particles could form the functionally graded materials with tailored structure and coercive force. Furthermore, it was found that the magnetic parameters (the local anisotropy field, ferromagnetic resonance linewidth, and coercivity) are mainly determined by the artificially created interface boundaries for all grains’ spatial distribution. The magnetic anisotropy field and coercivity of Co(P)/Ni(P) flat films were characterized by lower values than those for spherical shell of particles with the same composition, produced by the same method.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Chekanova L. A., Denisova E. A., Mel'nikova S. V., Iskhakov R. S.
Заглавие : Composite magnetic materials based on porous templates with different pores morphology: synthesis and magnetic properties
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 169. - ISBN 978-5-7444-3124-2
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Nemtsev I. V., Iskhakov R. S., Shepeta N. A., Kuzovnikova L. A.
Заглавие : Composition Graded Materials With Different Spatial Distribution
Коллективы : Annual conference on мagnetism and мagnetic мaterials
Место публикации : 65th Annual conference on мagnetism and мagnetic мaterials (MMM-2020): abstract book. - 2020. - Ст.G6-12. - P.210
Примечания : Cited references: 2
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Komogortsev S. V., Rautsky M. V., Nemtsev I. V., Iskhakov R. S., Plotnikov V. S., Tkachev V. V., Li O. A., Dolgopolova M. V.
Заглавие : Core-shell and bi-segmented cobalt-nickel nanorods prepared by electroless deposition
Место публикации : IEEE Trans. Magn. - 2022. - Vol. 58, Is. 2. - Ст.2300805. - ISSN 00189464 (ISSN), DOI 10.1109/TMAG.2021.3098747
Примечания : Cited References: 27. - This work was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-43-240003. The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center“ Krasnoyarsk Science Center SB RAS” for the provided equipment
Аннотация: A porous polymer loaded with segmented nanorods of magnetic metal is very promising for the design of novel microwave devices. Arrays of bi-segmented Ni/Co and core-shell Ni@Co rods were prepared by electroless deposition into porous of polycarbonate track etched membrane. An intrinsic effective magnetic field of the magnetic composite nanorods aligned in the nonmagnetic template was studied by magnetization curves and ferromagnetic resonance. The effect of the interface boundaries for two types of bi-segmented rods with coaxial and along-axis Co/Ni segmentation to effective field was established.
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisova E. A., Chekanova L. A., Komogortsev S. V., Rautskii M. V., Nemtsev I. V., Iskhakov R. S., Tkachev V. V., Plotnikov V. S., Dolgopolova M. V.
Заглавие : Core-shell and Bi-segmented cobalt-nickel nanorods prepared by electroless deposition
Коллективы : IEEE International Magnetics Conference
Место публикации : IEEE International Magnetics Virtual Conference (INTERMAG'21): Digest book. - 2021. - P.1342
Примечания : Cited References: 2. - This work was funded by the RFBR, the Government of the Krasnoyarsk Territory, the KRFS (project no. 20-43-240003)
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Iskhakov R. S., Denisova E. A., Lepeshev A. A.
Заглавие : Ddiffuse amorphous phase-1 amorphous phase-2 phase-transition in the amorphous alloy Co-Ni-Fe-B-Si
Место публикации : JETP Letters. - 1995. - Vol. 62, Is. 7. - P.564-567. - ISSN 0021-3640
Примечания : Cited References: 7
Аннотация: It is shown that under certain conditions relaxation annealing of the amorphous alloys Co-Ni-Fe-B-Si leads to a diffuse ''amorphous phase 1 - amorphous phase 2'' phase transition at the structural relaxation stage. (C) 1995 American Institute of physics.
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16.

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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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Komogortsev S. V., Iskhakov R. S., Chekanova L. A., Velikanov D. A., Kalinin Y. E., Sitnikov A. V.
Заглавие : Effect of annealing on the magnetic properties of (Co40Fe40B20)x(SiO2)1–x granular nanocomposites
Место публикации : Bull. Russ. Acad. Sci. Phys.: Allerton Press, 2016. - Vol. 80, Is. 11. - P.1332-1334. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873816110186
Примечания : Cited References: 31. - This work was supported by the Russian Foundation for Basic Research, project nos. 15-08-06673, 16-03-00256, and RFBR-KRFS 15-42-04171.
Ключевые слова (''Своб.индексиров.''): annealing--magnetic properties--multilayers--spin waves--sputtering--concentration dependence--effect of annealing--granular composites--ion-beam sputtering--metal phase--spin wave resonances--ion beams
Аннотация: The effect of annealing on the magnetic properties of (Co40Fe40B20)x(SiO2)1–x granular composites fabricated via ion-beam sputtering is investigated. It is established that annealing changes the concentration dependences of the ferromagnetic resonance field and linewidth and shifts the regions of metal phase concentration corresponding to the spin-wave resonance. © 2016, Allerton Press, Inc.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Kuzovnikova L. A., Iskhakov R. S., Bukaemskiy A. A., Eremin E. V., Nemtsev I. V.
Заглавие : Effect of ball milling and dynamic compaction on magnetic properties of Al2O3/Co(P) composite particles
Коллективы : Russian Foundation of Basic Research [13-03-00476-a]
Место публикации : J. Appl. Phys.: American Institute of Physics, 2014. - Vol. 115, Is. 17. - Ст.17B530. - ISSN 0021-8979, DOI 10.1063/1.4869158. - ISSN 1089-7550
Примечания : Cited References: 18. - This work was partially supported by Russian Foundation of Basic Research 13-03-00476-a.
Предметные 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.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kuzovnikova L. A., Denisova E. A., Komogortsev S. V., Iskhakov R. S., Nemtsev I. V., Shepeta N. A.
Заглавие : Effect of intensive plastic deformation on structure and magnetic properties of Al2O3/Co(P) nanocomposite particles
Коллективы : Fundamental Bases of Mechanochemical Technologies, International Conference, "Фундаментальные основы механохимических технологий", международная конференция, Институт химии твердого тела и механохимии Сибирского отделения РАН, Новосибирский государственный университет
Место публикации : V International conference "Fundamental bases of mechanochemical technologies". FBMT- 2018: book of abstracts : [25-28 June 2018, Novosibirsk, Russia]. - 2018. - P.141. - ISBN 978-5-4437-0794-5
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova E. A., Iskhakov R. S., Stolyar S. V., Komogortsev S. V., Chekanova L. A., Maltsev V. K., Kalinin Y. E., Sitnikov A. V.
Заглавие : Exchange interaction in the Co-SiO2 nanocomposite films
Место публикации : TRENDS IN MAGNETISM. - 2011. - Vol. 168-169. - С. 265-268. - ISSN 10120394 (ISSN); 9783037850213 (ISBN), DOI 10.4028/www.scientific.net/SSP.168-169.265
Ключевые слова (''Своб.индексиров.''): exchange coupling parameter--ferromagnetic resonance--granular composite films--cobalt--exchange coupling--exchange interactions--ferromagnetic materials--ferromagnetic resonance--ferromagnetism--magnetic resonance measurement--nanocomposite films--nanocomposites--nuclear magnetic resonance--resonance--silicon compounds--spin waves--cobalt--exchange coupling--exchange interactions--ferromagnetic materials--ferromagnetic resonance--ferromagnetism--magnetic resonance measurement--magnetism--nanocomposite films--nuclear magnetic resonance--spin fluctuations--spin waves--co content--coupling parameters--dispersion relations--granular composite films--magnetic measurements--nanogranulars--nmr studies--structural state--granular composites--nano-granular--standing spin waves--composite films--composite films
Аннотация: The properties of Co-SiO2 nanogranular composite films, containing a Co volume fraction ranging from 0.3 to 0.8, have been characterized by means of magnetic measurements, NMR study, and ferromagnetic resonance. Thermal decrease of CoX(SiO2)100-X magnetization follows the T3/2 law and allows to estimate the exchange interaction constant A. With growing nominal Co content the transitions from granular to continuous structural state at 36% Co are registered by FMR measurements. The spectrum of standing spin-wave has been detected in the perpendicular experiment configuration for films with the Co content above 52 vol. %. It is found that the type of the dispersion relation of spin waves in Co-SiO2 composite films is affected by the exchange coupling fluctuations.
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