Crystal strain, chemical bonding, magnetic and magnetostrictive properties of erbium (Er³⁺) ion substituted cobalt-rich ferrite (Co_1.1Fe_1.9−xEr_xO₄)

Abstract

Induced strain and magnetostrictive coefficient (λ11) with the applied magnetic field (H) for different compositions of Co1.1Fe1.9−xErxO4.

Antibacterial and antibiofilm activities of silver-decorated zinc ferrite nanoparticles synthesized by a gamma irradiation-coupled sol–gel method against some pathogenic bacteria from medical operating room surfaces

“…59 Also, the increase in crystallite size aer gamma irradiation had been ascribed to an increase the ordered parts of the crystallites (grains) at the expense of disordered grain boundary regions. 60 The hopping distance of ions between the A and B sites of pure ZFO NPs and Ag@ZFO NPs samples was determined aer applying eqn (2)-(4): 61,62 View Article Online…”

“…It is evident from Table 1 that the hopping distance of pure ZFO NPs and Ag@ZFO NPs samples slightly decreased for Ag 0.25 @ZFO NPs and then increased with Ag ratio, which was well matched with the behaviour of the lattice constant. [61][62][63] Also, Gingasu et al 64 reported the green synthesis of Ag@CoFe 2 O 4 (Ag@CFO) NPs. They observed that XRD patterns of Ag@CFO showed the formation of CFO and Ag NPs.…”

Influence of neodymium substitution on structural, magnetic and spectroscopic properties of Ni–Zn–Al nano-ferrites

“…This decrease in the value of Curie temperature with increasing Nd content may be due to a change in cation distribution between the tetrahedral and octahedral sites of the spinel lattice on the basis of strength of the exchange interactions. S. G. Kakade et al 45 reported that the Curie temperature decreases with Er substitution in CoFe 2 O 4 due to decreasing the strength of A–B sublattice superexchange interactions. For the spinel oxides AB 2 O 4 , as reported by Néel about the two-sublattice model of ferrimagnetism, 47 the magnetic properties are governed by competition among the magnetic interactions between ions occupying the A and B sub-lattices: the intrasite J AA and J BB (A–O–A and B–O–B) and the strongest and most dominant A–B sub-lattice exchange J AB .…”

Microstructural, magnetic, and hyperfine characterizations of Cu‐doped cobalt ferrite nanoparticles

“…After eliminating instrumental broadening effect, the total measured line width β (FWHM in radian) is the sum of actual crystallite size ( β size ) and microstrain ( β strain ) broadening effects. where K is the geometric factor (for a spherical shape, its value is 0.94), λ is the X‐ray wavelength, ε is the microstrain developed inside tiny nanocrystal and θ is the Bragg's angle. Rearranging above equation, we get an equation of this form:…”