Study of the structural, electrical, dielectric properties and transport mechanisms of CuFeO ferrite nanoparticles for energy storage, photocatalytic and microelectronic applications.

CuFeO nanoparticles were synthesized by the self-combustion method whose XRD and FTIR analyzes confirm the formation of the desired spinel phase. The thermal evolution of conduction shows a semiconductor behaviour explained by a polaronic transport mechanism governed by the Non-overlapping Small Polaron Tunnelling (NSPT) model. DC conductivity and hopping frequency are positively correlated.

Study of physical properties of a ferrimagnetic spinel CuMnO: spin dynamics, magnetocaloric effect and critical behavior.

The present work reports a detailed study of the spin dynamics, magnetocaloric effect and critical behaviour near the magnetic phase transition temperature, of a ferrimagnetic spinel CuMnO. The dynamic magnetic properties investigated using frequency-dependent ac magnetic susceptibility fitted using different phenomenological models such as Neel-Arrhenius, Vogel-Fulcher and power law, strongly indicate the presence of a cluster-glass-like behavior of CuMnO at 40 K. The magnetization data have revealed that our compound displays an occurrence of second-order paramagnetic (PM) to ferrimagnetic (FIM) phase transition at the Curie temperature = 80 K as the temperature decrease.

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

NiZnAlFe Nd O ferrite samples, with = 0.00, 0.05, 0.

Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of NdSrMnO manganite.

NdSrMnO polycrystalline manganite was synthesized by two different methods: the auto-combustion reaction (NSMO-AC) and the sol-gel method (NSMO-SG). The structural, magnetic, magnetocaloric and critical behavior of the samples were examined. Rietveld refinements of the XRD patterns revealed that both compounds are pure single phase indexed to the orthorhombic system adopting the space group.

Electrical conductivity and dielectric properties of Sr doped M-type barium hexaferrite BaFeO.

The hexaferrite Ba Sr FeO compounds with = 0, 0.5 and 1 were synthesized by the autocombustion method. X-ray diffraction (XRD), Raman spectroscopy and transmission electron microscopy (TEM) were used for structural and morphological studies.

Structural, optical and dielectric properties of CuMnO spinel nanoparticles.

In this study, a CuMnO spinel was successfully synthesized by a sol-gel method at 500 °C for 5 h and characterized by different techniques. X-ray diffraction (XRD), Fourier transformation infrared (FTIR) spectroscopy and Raman spectroscopic analyses confirmed the formation of a spinel cubic structure with the 3̄ space group. The SEM proves that the grain size of our compound is of the order of 48 nm.

Magnetic and spectroscopic properties of Ni-Zn-Al ferrite spinel: from the nanoscale to microscale.

This article presents the annealing effect on the structural, elastic, thermodynamic, optical, magnetic, and electric properties of NiZnFeAlO (NZFAO) nanoparticles (NPs). The samples were successfully synthesized by the sol-gel method followed by annealing of the as-synthesized at 600, 800, 900, 1050, and 1200 °C. This approach yielded the formation of a highly crystalline structure with crystallite size ranging from 17 nm to 40 nm.

Investigation of the structural, optical, elastic and electrical properties of spinel LiZnFeO nanoparticles annealed at two distinct temperatures.

Nanoparticles of LiZnFeO (LiZnFeO) with the spinel structure were prepared by a sol-gel auto-combustion method at two different annealing temperatures. X-ray diffractograms and Rietveld refinement confirmed the formation of the spinel structure. The morphology was analyzed by electron microscopy, which showed that the grains were composed of different crystallites.

Investigation of annealing effects on the physical properties of NiZnFeAlO ferrite.

In the present study, the structural, morphological, electrical, and dielectric properties of NiZnFeAlO annealed at 600 °C, 900 °C, and 1200 °C were investigated. The X-ray diffraction patterns confirmed the presence of the single-phase cubic spinel structure with the 3̄ space group. The SEM images of NiZnFeAlO nanoparticles demonstrated that these samples (Ni900 and Ni1200) were nano-sized and that the increase in annealing temperature enhanced the agglomeration rate.