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Nature of the active sites of ferrospheres in the oxidative condensation of methane / A. G. Anshits [et al.] // Kinet. Catal. - 2015. - Vol. 56, Is. 4. - P. 523-531, DOI 10.1134/S0023158415040023. - Cited References:37. - This work was supported by the Russian Science Foundation (grant no. 14-13-00289). . - ISSN 0023. - ISSN 1608-3210. -

РУБ Chemistry, Physical
Рубрики:
GLASS CRYSTAL CATALYSTS
   HIGH-TEMPERATURE
   MOSSBAUER
   MAGNETITES
   MICROSPHERES
   SELECTIVITY
   CONVERSION
   FERRITES
   ASHES
   IRON
Кл.слова (ненормированные):
oxidative condensation of methane -- ferrospheres -- iron spinel -- Mossbauer spectroscopy -- structural defects
Аннотация: The catalytic properties of ferrospheres containing 76–97 wt % Fe2O3 in the oxidative condensation of methane were compared with their phase composition and the distribution of iron cations over the crystallographic positions of iron-containing phases in a steady state. It was established that the reaction route of methane oxidation changed at a Fe2O3 content of 89 wt %. Deep oxidation was the main reaction route on ferrospheres with a Fe2O3 content of <88.8 wt %. At a Fe2O3 content of ≥89 wt %, the yield of C2 hydrocarbons sharply increased and the contribution of deep oxidation decreased. The yield of C2 hydrocarbons correlated with the amount of defects in the structure of iron spinel, which are iron ions with the tetrahedral cation of Ca2+ and the octahedral cation vacancy among the nearest neighbors.

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Публикация на русском языке Природа активных центров ферросфер в процессе окислительной конденсации метана [Текст] / А. Г. Аншиц [и др.] // Кинетика и катализ : Наука, 2015. - Т. 56 № 4. - С. 529-538

Доп.точки доступа:
Anshits, A. G.; Аншиц, Александр Георгиевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Anshits, N. N.; Pletnev, O. N.; Плетнев, Олег Николаевич; Rabchevskii, E. V.; Vereshchagin, S. N.; Kondratenko, E. V.; Russian Science Foundation [4-13-00289]; Russian Congress on Catalysis (2 ; 2014 ; Oct. ; 2–5 ; Samara)
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Second harmonic generation in thin permalloy film / P. N. Solovev, A. O. Afonin, B. A. Belyaev [et al.] // J. Phys. D. - 2021. - Vol. 54, Is. 42. - Ст. 425002, DOI 10.1088/1361-6463/ac1762. - Cited References: 43. - This work was supported by the Russian Science Foundation under Grant No. 19-72-10047. The equipment of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center 'Krasnoyarsk Science Center SB RAS' was used during the measurement . - ISSN 0022-3727. - ISSN 1361-6463

РУБ Physics, Applied
Рубрики:
FERROMAGNETIC-RESONANCE
   MAGNETIZATION DYNAMICS
   HARMONIC-GENERATION
   FERRITES
Кл.слова (ненормированные):
ferromagnetic resonance -- frequency doubling -- nonlinear dynamics -- thin magnetic film -- second harmonic
Аннотация: Second harmonic generation versus strength and direction of the applied static magnetic field was measured for a thin permalloy (Ni80Fe20) film in a microstrip line at a driving frequency of 1 GHz and maximum input power of ~110 mW. The measurements revealed two peaks in the double frequency signal—in the low static field (~10 Oe) and the high one (~45 Oe). To explain these findings, a macrospin model of a thin magnetic film with in-plane uniaxial magnetic anisotropy was considered. A perturbation expansion of the Landau–Lifshitz–Gilbert equation provided an explanation of the experimental data. The analysis of the model revealed that the low-field peak was caused by the longitudinal second-order magnetization component and the high-field peak by the transversal one. It was also shown that the uniaxial magnetic anisotropy of the film and the dependence of the magnetic damping parameter on the applied field play an important role in the process of the second harmonic generation. The results obtained give insights into some peculiarities of the nonlinear magnetization dynamics that are important in the development of magnetic film-based devices in the field of microwave signal processing and manipulation.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Solovev, P. N.; Соловьев, Платон Николаевич; Afonin, A. O.; Афонин, Алексей Олегович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Govorun, I. V.; Говорун, Илья Валерьевич; Izotov, A. V.; Изотов, Андрей Викторович; Ugryumov, A. V.; Угрюмов, Андрей Витальевич; Leksikov, An. A.; Лексиков, Андрей Александрович; Russian Science FoundationRussian Science Foundation (RSF) [19-72-10047]
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