Synthesis and investigation of oxygen deficiency effect on electric properties of La0.75Ba0.10Sr0.15FeO2.875-δ (δ = 0.00, 0.125 and 0.25) ferrites

Correlation among the structural, electric and magnetic properties of Al3+ substituted Ni–Zn–Co ferrites

“…Besides, oxygen deficiency plays a vital role in charge carriers' mobility. 44 Conductivity increases with the oxygen vacancy concentration. 44 The changing of particle sizes with compositions, x , changes the number of grain boundaries that vary the electron mobility from one grain to another.…”

“…44 Conductivity increases with the oxygen vacancy concentration. 44 The changing of particle sizes with compositions, x , changes the number of grain boundaries that vary the electron mobility from one grain to another. 44 Due to the grain boundary's conductive property, the samples' oxygen vacancy concentration may influence the conductivity.…”

“…44 The changing of particle sizes with compositions, x , changes the number of grain boundaries that vary the electron mobility from one grain to another. 44 Due to the grain boundary's conductive property, the samples' oxygen vacancy concentration may influence the conductivity. Hence, the hoping of electrons plays a significant role in increasing the conductivity of the studied ferrites.…”

Analysis of the electrical transport, conductivity, and dielectric relaxation behavior of La0.75 Ba0.10 Sr0.15 Fe O2.875-δ (δ = 0.375 and 0.50) brownmillerite oxides

“…Most of the brownmillerite compounds [2], where the total conductivity includes the contribution of electronic and ionic conductivity, stand for mixed conductors. Our compounds possess the contribution of both electron and oxide-ion conductivity in view of the presence of oxygen vacancies and mixed valence states of iron ions (Fe 2+ /Fe 3+ ) [35].…”

“…The conduction is ensured by the hopping of electron from Fe 3+ to Fe 2+ ions and the presence of oxygen vacancy [35]. The increase in temperature enhances the hopping phenomenon resulting in an increase in the conduction process and therefore leading to the conductance increase [37].…”