Structural, morphological and magnetic properties of Sr0,54Ca0,46Fe6,5Al5,5O19 M-type hexaferrites: Effects of annealing temperature

Elkhouad, S.; Yamkane, Z.; Louafi, J.; Moutataouia, M.; Omari, L.H.; Elouafi, A.; Moubah, R.; Lassri, H.; Moussaoui, H. El

doi:10.1016/j.ssc.2021.114453

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…The MCE parameter by magnetic entropy change DS M has been related to the isothermal magnetization, determined at various magnetic fields and temperatures (figure 3(a)). According to thermodynamic theory, DS M is related to magnetic field change as follows [44]: According to the thermodynamics Maxwell's relation [45][46][47]:…”

Section: Resultsmentioning

confidence: 99%

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

et al. 2023

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The structural, morphological, magnetic and magnetocaloric properties of Er2Ir2O7 are investigated. The X-ray diffraction analysis showed that Er2Ir2O7 has a cubic structure with the Fđ3m space group. Using Williamson-Hall (W-H) plot, the crystallite size was found to be smaller than that obtained from the SEM image. Magnetic measurements revealed a weak ferromagnetic transition at TC =140K, caused by the appearance of magnetic order of the Ir moments. ΔT (temperature at full width of half maxima) was estimated to be 27K and 40K for magnetic field changes of 40 kOe and 50 kOe, corresponding to the relative cooling power (RCP) values of 98 J/kg and 128 J/kg, respectively. Temperature-averaged Entropy Change (TEC) was calculated for all applied magnetic fields, and found to be slightly lower than (-∆S_M^max) values, indicating less hysteresis loss in the compound Er2Ir2O7 during the magnetic transition. This study provides a new pyrochlore material for MCE magnetocaloric applications.

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Section: Resultsmentioning

confidence: 99%

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

et al. 2023

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“…The chemical morphology of all samples was analyzed using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) techniques (The FEI Quanta450 FEG environmental scanning electron microscope (ESEM)) [16][17][18].…”

Section: Scanning Electron Microscopy (Sem) and Energy Dispersive X-r...mentioning

confidence: 99%

Structural, Morphological and Mechanical Properties of Concrete Slab in Traditional Buildings in Casablanca, Morocco

Soumadrass,

Beidouri,

Zarbane

2023

Asec 2023

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“…Совместное использование ионов Sr, Ca и Al для замещения гексаферрита бария позволяет добиться большой удельной энергии магнита [5,22], поскольку известно, что для повышения удельной энергии постоянного магнита увеличивают коэрцитивную силу и остаточную индукцию материала.…”

Section: Introductionunclassified

Sol-gel synthesis of nanodispersed solid solutions based on barium hexaferrite SrхBa(1–х)Fe12O19

Kovalev,

Vinnik,

Zherebtsov

et al. 2023

Chem

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The present paper provides data on the sol-gel synthesis of M-ferrite with the SrxBa(1–x)Fe12O19 (х = 0; 0.3; 0.5; 0.7; 1) composition. The synthesis technique is based on the preparation of a polymeric citrate complex from citric acid and nitrates of barium, strontium, and iron, its calcination at 500 °C followed by mechanochemical activation, and calcination at 700 °C. The target product is a dark brown powder, which has been studied by the XRD and SEM methods, energy-dispersive X-ray spectroscopy and differential scanning calorimetry (DSC). The single-phase state of the obtained samples is confirmed by powder X-ray diffraction. The X-ray patterns of the synthesized hexaferrites match the X-ray patterns of reference com-pounds from the ICDD database for all diffraction maxima. The unit cell parameters of the samples have been calculated from the X-ray diffraction patterns. They linearly depend on the degree of barium substitution in hexaferrite, that is, the successful replacement of barium ions in the crystal lattice by strontium ions, due to the Vegard rule for solid solutions. Morphological pa-rameters have been studied using SEM, the analysis of the obtained images indicates the for-mation of nanodispersed hexaferrites, for which the average particle size is 50 nm. The average particle size, calculated by the Scherrer's formula, equals 25 nm. The usual hexagonal form of hexaferrite particles has not been observed in the SEM images due to the small particle size. En-ergy-dispersive X-ray spectroscopy of the obtained images indicates a high degree of homogeni-zation for the chosen synthesis technique. Using the DSC method we obtained values of Curie temperature which show it’s increases linearly with an increasing of Sr weight percent

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Structural, morphological and magnetic properties of Sr0,54Ca0,46Fe6,5Al5,5O19 M-type hexaferrites: Effects of annealing temperature

Cited by 16 publications

References 23 publications

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Structural, Morphological and Mechanical Properties of Concrete Slab in Traditional Buildings in Casablanca, Morocco

Sol-gel synthesis of nanodispersed solid solutions based on barium hexaferrite SrхBa(1–х)Fe12O19

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Structural, morphological and magnetic properties of Sr0,54Ca0,46Fe6,5Al5,5O19 M-type hexaferrites: Effects of annealing temperature

Cited by 16 publications

References 23 publications

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

Structural, Morphological and Mechanical Properties of Concrete Slab in Traditional Buildings in Casablanca, Morocco

Sol-gel synthesis of nanodispersed solid solutions based on barium hexaferrite SrхBa(1–х)Fe12O19

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Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇