Structural and magnetic properties of praseodymium substituted barium-based spinel ferrites

Shah, Muhammad Shakil; Ali, Khuram; Ali, Irshad; Mahmood, Asif; Ramay, Shahid M.; Farid, Muhammad Asim

doi:10.1016/j.materresbull.2017.09.063

Cited by 55 publications

(10 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The large O 2− ions produce a face-centered cubic lattice. The cubic cell has two types of interstitial sites: (1) tetrahedral sites enclosed via 4 oxygen anions (A-site), (2) octahedral sites enclosed by 6 oxygen anions (B-site) (Shah et al 2018;Yadav et al 2018;Kefeni et al 2020). Figure 1 shows the tetrahedral and octahedral positions in the FCC lattice (Cullity and Graham 2011;AJMAL 2009;Vijayanand 2010;Bhame 2007;Sachdev 2006).…”

Section: Supercapacitor-based On Spinel Ferritesmentioning

confidence: 99%

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

et al. 2020

View full text Add to dashboard Cite

Supercapacitors are increasingly used for energy conversion and storage systems in sustainable nanotechnologies. Graphite is a conventional electrode utilized in Li-ion-based batteries, yet its specific capacitance of 372 mA h g −1 is not adequate for supercapacitor applications. Interest in supercapacitors is due to their high-energy capacity, storage for a shorter period and longer lifetime. This review compares the following materials used to fabricate supercapacitors: spinel ferrites, e.g., MFe 2 O 4 , MMoO 4 and MCo 2 O 4 where M denotes a transition metal ion; perovskite oxides; transition metals sulfides; carbon materials; and conducting polymers. The application window of perovskite can be controlled by cations in sublattice sites. Cations increase the specific capacitance because cations possess large orbital valence electrons which grow the oxygen vacancies. Electrodes made of transition metal sulfides, e.g., ZnCo 2 S 4 , display a high specific capacitance of 1269 F g −1 , which is four times higher than those of transition metals oxides, e.g., Zn-Co ferrite, of 296 F g −1. This is explained by the low charge-transfer resistance and the high ion diffusion rate of transition metals sulfides. Composites made of magnetic oxides or transition metal sulfides with conducting polymers or carbon materials have the highest capacitance activity and cyclic stability. This is attributed to oxygen and sulfur active sites which foster electrolyte penetration during cycling, and, in turn, create new active sites.

show abstract

Section: Supercapacitor-based On Spinel Ferritesmentioning

confidence: 99%

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…4 [18]. In general, a small grain size results in a higher coercive force due to pinning of domain walls, which requires a higher energy for switching [19].…”

Section: Vsm Studiesmentioning

confidence: 99%

Correlation between ferromagnetic resonance and densification of RE substituted polycrystalline ferrites

Manzoor

Khan

Kuch

2018

Ceramics International

View full text Add to dashboard Cite

We report the dopant-and size-dependent variations in high-frequency magnetic and electrical transport properties of Ho-substituted Li-Mn polycrystalline ferrites. Thermal stability and phase identification were confirmed by thermal gravimetric analysis and X-ray diffraction experiments. The overall average crystallite size decreased from 29.6 to 17.5 nm, whereas the bulk density increased from 3.47 to 4.29 g/cm 3 with increasing Ho content. Ferromagnetic resonance (FMR) measurements at the X-band revealed significant shifts in FMR linewidths and resonance positions as a function of composition. Both, FMR linewidth and porosity, were found to decrease with the systematic addition of Ho from 2538 to 2359 Oe and from 26 to 15.4%, respectively. The substitution of Ho 3+ for Fe 3+ reduced the net magnetization of the spinel lattice from 53 to 41 emu/g. Electrical measurements revealed that the resistivity is higher in samples with smaller grains possessing a greater number of thin insulating grain boundaries. The activation energy ∆E required for hopping increases from 0.09 to 0.16 eV with Ho addition, which may be well explained by the increase in resistivity. The substitution of Ho 3+ for Fe 3+ causes a decrease in Curie temperature T c due to the damping of A-B exchange interactions.

show abstract

“…M-type Barium ferrite has a hexagonal structure and owns the prompt BaFe12O19 [Khotib et al, 2019]. Ferrites have a huge resistivity, a trivial eddy current and low magnetic losses, relatively low cost, good chemical stability [Muhammad et al, 2018;Bogdan et al 2017], superparamagnetism state, magnetic tunneling, good biocompatibility and easy to be synthesized [Rohit et al, 2019].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of Ba Ferrite Substituted by Low Fraction of Ni Cations

Abdel-Mohsen

Lafta

Hashim

2022

KJS publishes peer-review articles in Mathematics, Computer Sci

View full text Add to dashboard Cite

Four compositions of spinel NixBa1-xFe2O4 of x =0, 0.05, 0.01, and 0.15 were prepared by the auto-combustion route. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and Scanning Electron Microscopy (SEM) analyses were utilized to determine the structural properties. All samples showed a cubic spinel structure with a noticeable FTIR tetrahedral band blue shift as the molar ratio x was increased. The crystallite size and particle size have the same behavior as x changed from 0 to 0.15. Spherical nanoparticles aggregated into large clusters were found throughout the samples. Magnetic properties, displayed a drop in magnetization saturation as x increased to its max value. A saturation magnetization (Ms) of more than 48 emu/g was achieved at x = 0 and x = 0.15 while the coercivity did not change clearly. The fitting by the Langevin equation using Originlab software showed very close values of Ms to those measured by the vibrating sample magnetometer (VSM) test. Magnetic parameters are generally affected by both composition and particle size.

show abstract

Structural and magnetic properties of praseodymium substituted barium-based spinel ferrites

Cited by 55 publications

References 41 publications

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

Correlation between ferromagnetic resonance and densification of RE substituted polycrystalline ferrites

Magnetic properties of Ba Ferrite Substituted by Low Fraction of Ni Cations

Contact Info

Product

Resources

About