High-frequency absorption properties of gallium weakly doped barium hexaferrites

Труханов, С.В.; Kostishyn, V.G.; Zabeivorota, N.S.; Панина, Л. В.; Труханов, А.В.; Турченко, В. А.; Trukhanova, E.L.; Oleynik, V. V.; Yakovenko, O. S.; Matzui, L. Yu.; Живулин, В.Е.

doi:10.1080/14786435.2018.1547431

Cited by 65 publications

(5 citation statements)

References 59 publications

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“…For numerical simulation results, accuracy verification should generally be performed [ [37] , [38] , [39] , [40] , [41] , [42] ]. Therefore, we evaluate the forecasting performance of FSGM(1,1,

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Section: Construction Of Fsgm (11 )mentioning

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A novel seasonal grey prediction model with fractional order accumulation for energy forecasting

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2024

Heliyon

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Section: Construction Of Fsgm (11 )mentioning

confidence: 99%

A novel seasonal grey prediction model with fractional order accumulation for energy forecasting

Wang,

2024

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“…Solar energy has then spurred various research avenues, drawing the attention of researchers worldwide [ 3 ]. These include the development of advanced materials with several applications that includes PV modules improvements and applications [ 10 , 11 ], as well as the creation of efficient PV simulation tools [ 2 ]. Given the costs associated with PV installations, modeling PV modules is an essential task before their integration into PV systems, particularly in large installations.…”

Section: Introductionmentioning

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An adaptable method for efficient modeling of photovoltaic generators’ performance based on the double-diode model

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“…An impressive number of works have been devoted to the study of the effect of substitution of Fe 3+ iron cations in the initial matrix of the M-type hexagonal ferrites on other three-charged cations. Of great interest are works on substitution with gallium [17][18][19], aluminum [20][21][22], chromium [23][24][25], and indium [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Creation and Magnetic Study of Ferrites with Magnetoplumbite Structure Multisubstituted by Al3+, Cr3+, Ga3+, and In3+ Cations

et al. 2022

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Multisubstituted barium ferrites with a magnetoplumbite structure were obtained by the method of solid-phase reactions with ferritization and pre-firing. Three-charged, mainly diamagnetic cations Al3+, Cr3+, Ga3+, and In3+ were chosen as substituents for the Fe3+ iron cations, the proportion of which in solid solutions did not exceed 50%. The values of the configurational mixing entropy were calculated for all the compositions. A slight deviation of the chemical composition of the obtained solid solutions from the nominal value was established by the energy-dispersive X-ray spectroscopy method. The phase purity and values of the unit cell parameters were refined from X-ray scattering data using full-profile analysis in the Rietveld method. A non-monotonic behavior of the unit cell parameters as a function of the B-sub-lattice average ionic radius of the magnetoplumbite structure was found. A minimum unit cell volume of ~667.15 Å3 was found for the composition BaFe6.11Al1.56Cr2.17Ga2.16O19 with a B-sub-lattice average ionic radius of ~7.449 Å. The average crystallite size varied within 5.5–6.5 μm. The temperature and field dependencies of the magnetization have been measured. The values of the saturation magnetization, residual magnetization, hysteresis loop squareness, and coercivity at 50 K and 300 K were extracted from the experimental data. Using the Law of Approach to Saturation, the magnetic crystallographic anisotropy coefficient and anisotropy field were calculated. Multisubstitution leads to a significant decrease in such magnetic parameters as the magnetic ordering temperature and spontaneous magnetization at both temperatures. The maximum magnetic ordering temperature of ~297.7 K was found for the composition BaFe5.84Ga6.19O19 with a B-sub-lattice average ionic radius of ~7.586 Å in a field of 500 Oe. A maximum saturation magnetization of ~24.7 emu/g was found for the composition BaFe5.84Ga6.19O19 with a B-sub-lattice average ionic radius of ~7.586 Å at 50 K. A maximum hysteresis loop squareness of ~0.72 was found for the composition BaFe6.11Al1.56Cr2.17Ga2.16O19 with an average ionic radius of ~7.449 Å at 50 K. A maximum magnetic crystallographic anisotropy coefficient of ~2.09 × 105 Erg/g was found for the composition BaFe6.19Al1.25Cr1.57Ga1.74In1.26O19 with a B-sub-lattice average ionic radius of ~7.706 Å at 50 K. The frustrated magnetic state including the nano-sized clusters with an average diameter in the range of 50–200 nm was established from the results of measuring the ZFC and FC temperature magnetizations. The interpretation of the obtained experimental data is carried out taking into account the increased stability of high-entropy phases and regular changes in the intensity of the Fe3+(Al3+, Cr3+, Ga3+, In3+)–O2−–Fe3+(Al3+, Cr3+, Ga3+, In3+) indirect superexchange interactions as a result of magnetic dilution of the iron sub-lattice in the magnetoplumbite structure.

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High-frequency absorption properties of gallium weakly doped barium hexaferrites

Cited by 65 publications

References 59 publications

A novel seasonal grey prediction model with fractional order accumulation for energy forecasting

A novel seasonal grey prediction model with fractional order accumulation for energy forecasting

An adaptable method for efficient modeling of photovoltaic generators’ performance based on the double-diode model

Creation and Magnetic Study of Ferrites with Magnetoplumbite Structure Multisubstituted by Al3+, Cr3+, Ga3+, and In3+ Cations

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