Size dependent exchange bias in single-phase Zn 0.3 Ni 0.7 Fe 2 O 4 ferrite nanoparticles

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

“…The sizes of the nanoparticles were found to grow with the increase of the Cu content in cobalt ferrite. 10,12 A similar kind of correlation regarding size of the nanoparticles was also observed in the XRD results. The average size of the nanoparticles for A-1 and A-5 ferrite samples was 46 and 69 nm as obtained from HRTEM images.…”

“…A fine black mass of ferrite particle was obtained. 12 All characterizations were performed with the powder form of the samples.…”

“…The refinement parameters indicate the agreement between theoretical and observed data of XRD patterns. [11][12][13] The small crystallite size and microstrain developed inside the nanocrystallites (varying from one part of grain to another part) are mainly responsible for XRD peaks broadening. Additionally, instrumental broadening effect also contributes to peak broadening.…”

Quaternary ferrites by batch and continuous flow hydrothermal synthesis: a comparison

“…[13][14][15] As a corollary, when exploring these synthetic avenues, it is also important to have a good understanding of how different methodologies and approaches will influence the characteristics of the synthesised materials (and therefore, in turn, their functional properties). Quaternary spinel ferrites (a subset of spinel ferrites, also known as mixed ferrites, containing two metals (M, M') and having chemical formula MxM'1-xFe2O4) are inorganic crystalline materials of particular interest, because of the presence of two metal species (having different electronic configuration) within the same spinel lattice can give rise to several interesting magnetic, 16,17 electrical 18 and catalytic properties. 19 This allows applications in a broad variety of fields ranging from CO2 decomposition catalysts, 19,20 to gas sensing 18 and several magnetic devices including spin valves, MRAM and spintronics.…”

“…19 This allows applications in a broad variety of fields ranging from CO2 decomposition catalysts, 19,20 to gas sensing 18 and several magnetic devices including spin valves, MRAM and spintronics. 16 Among such ferrites, the zinc spinel ferrite ZnFe2O4 is a well-known compound with a normal spinel structure 21 (that is to say, Zn II occupies tetrahedral A sites within the spinel matrix, whereas Fe III occupies octahedral B sites). 22 By partially substituting Zn with other metals that have the tendency to yield inverse (such as Co) 23 or partially inverse spinels (such as Ni), 24 changes are generated in its crystal structure allowing the tuning of the electronic and magnetic properties of the materials.…”