Phase analysis and cation distribution correlated with magnetic properties of spinel Ba1−xSrxFe2O4 ferrites prepared at different annealing temperatures

Redox electrolyte mediated performance enhancement in aqueous zinc ion hybrid supercapacitors composed of spinel BaFe2O4 and cubic Cu2O

“…54 Particularly, spinel ferrites (SF) and their nanocomposites have captured the attention of researchers by virtue of their outstanding physical and chemical features, especially chemical stability with strong anisotropy, variety of oxidation states with higher operation voltage (À1.2-0.65 volts), good permeability and coercivity, excellent magnetic properties yet being cost-effective and eco-friendly. [55][56][57] A spinel ferrite is an intriguing oxide crystal structure with a face-centered cubic core with the chemical notation of MFe 2 O 4 generated by the combination of a triplet cation (Fe 3+ ) with another divalent metal cation, particularly a transition or posttransition metallic cation (M 2+ = Ba 2+ , Co 2+ , Cu 2+ , Mg 2+ , Mn 2+ , Sr 2+ , Zn 2+ , etc.). These cations may be settled in two distinct crystallographic locations (tetrahedral sites and octahedral sites) positioned among the cations and the adjoining oxygen ions due to changes in chemical composition, charge location, and consolidation energy.…”

“…Recent studies have also shown that the chemical structure of SF mechanisms, notably divalent cations rather than Fe 3+ cations, has a significant impact on their distinctive properties. 54,56,[58][59][60] Within SFs, CoFe @multi-walled carbon nanotube (MWCNTs) composite and reported the highest Sc as 390 F g À1 at a current density of 1 mA cm À2 in 2 M KOH electrolyte. Additionally, the fabricated ASC device resulted in a high ED of 26.7 W h kg À1 at a PD of 319 W kg À1 .…”

“…54 Particularly, spinel ferrites (SF) and their nanocomposites have captured the attention of researchers by virtue of their outstanding physical and chemical features, especially chemical stability with strong anisotropy, variety of oxidation states with higher operation voltage (−1.2–0.65 volts), good permeability and coercivity, excellent magnetic properties yet being cost-effective and eco-friendly. 55–57…”

Tuning the Structural and Magnetic Properties of the Stuffed Framework Structures MeFe2O4 (Me = Ni, Ca, and Sr)

“…However, few studies have been conducted on alkali and alkaline divalent cations. Based on the crystallographic structures, the ferrite NPs can be categorized as orthorhombic, hexagonal, and cubic [16][17][18]. The cubic MeFe 2 O 4 (Me = Ni 2+ , Fe 3+ , Co 2+ , Mg 2+ ) and orthorhombic MeFe 2 O 4 (Me = Ba 2+ or Ca 2+ ) magnetic materials are promising for various applications [19][20][21][22][23].…”

Supremacy of Magnetic Behaviour in n-Heptane Based M Doped Barium Ferrite (BaFe2O4) Nanoparticles (M: Co, Ni and Mn)

“…Here, Ba 2+ as A sites are tetrahedral and Fe 3+ as B sites are octahedral coordinated by oxygen atoms [4]. They can be effectively adjusted by using divalent ions such as Co, Ni, Mn, Zn, Ti and Sr [5][6][7]. The cobalt, nickel, manganese and barium ferrites come under low-cost materials that have good magnetic and dielectric properties.…”