Effect of d-block element substitution on structural and dielectric properties on iron cobaltite

Effect of Transition Metal on Structural and Dielectric Properties of Mg0.5Tm0.5Fe2O4 (Tm = Zn and Cu) System

“…It is difficult to obtain two full semicircles grain boundaries on the same scale in the impedance plot because of the huge difference in capacitive values of grain boundaries. Complex modulus analysis is useful when materials have different capacitance [21]. It is confirmed in our M″ versus frequency plot where the grain boundaries are negligible.…”

Ultrastable Magnetic Nanoparticles Encapsulated in Carbon for Magnetically Induced Catalysis

“…35 The FeCo@C spectrum also shows the FeCo 2 O 4 vibrational modes but with a lower intensity and slightly shifted to minor frequencies 189 (F 2g ), 465 (E g ), and 672 (A 1g ). 36 …”

“…35 FeCo@C spectrum also shows the FeCo2O4 vibrational modes but with a lower intensity and slightly shifted to minor frequencies 189 (F2g), 465 (Eg), and 672 (A1g). 36 The oxidation state and reducibility of these carbon-encapsulated MagNPs was investigated by X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR). By TPR we found that the reduction temperatures for Co@C and FeCo@C were 320 ºC and 351 ºC, respectively (see SI, Figures S9).…”

FIB plan view lift-out sample preparation for TEM characterization of periodic nanostructures obtained by spinodal decomposition in Co1.7Fe1.3O4 thin films

“…The iron -cobaltites spinel Co 3x Fe 3-3x O 4 (x ≥ 0.5) have not so far been as widely used in the industry as other spinels such as ferrites in particular. Their properties, however, are of interest for certain technological applications, among which can be mentioned the electrodes for batteries and supercapacitors [1,2], the absorber layers in high-performance solar cells [3], the magnetic logic cells [4] and the microwave components [5]. The formation of periodic organizations at a nanoscale by spinodal decomposition within the miscibility gap of the CoFe 2 O 4 -Co 3 O 4 phase diagram also makes it possible to imagine their use in magnetoresistance components.…”