Structural, magnetic and magnetocaloric study of Ni0.5Zn0.5Fe2O4 spinel

Synthesis Condition and Treatment Assisted Tuning of Structural, Magnetic Properties and Bandgap of Ni Nano Ferrite

“…Scherrer's crystallite size (D) shows nanocrystalline ferrite, D varies between 38.3-39.2 nm, and is reflected in specific surface area values range between 28.6-29.2m 2 /g. [19], but in present studies, NiFe 2 O 4 shows mixed spinel structure. In the ideal spinel structure, Ni 2+ prefers to be on the B site [1].…”

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

“…where l is X-ray wavelength, q is the diffraction angle and h, k, and l are Muller indices. The volume of the unit cell for a cubic system has been calculated from the following equation: V ¼ a exp 3 . All the obtained lattice parameters and volume of the ferrite's compounds are plotted against annealing temperature in Fig.…”

“…1,2 These materials are currently considered among the most successful magnetic nanoparticles (MNPs) for technological and medical applications e.g., magnetocaloric refrigerators, magnetic memory, solar water oxidation, electrochemical supercapacitor applications, biological applications, lithium-ion batteries, contrast enhancement in magnetic resonance imaging (MRI) and magnetic uid hyperthermia. [3][4][5][6][7][8][9][10] Therefore, an understanding of the structural and magnetic properties of spinels is of great importance from both a fundamental and an applied point of view. These properties can be controlled by synthesis methods, annealing temperature and/or by doping suitable elements into the A-site or B-site to change the structural parameters and/or the distribution cation.…”

“…The relation between structures and physical properties for nano ferrites requires a careful consideration. Therefore, various methods, including, forced hydrolysis in polyol, ball milling, coprecipitation, sol-gel auto-combustion and hydrothermal/solvothermal method etc., 3,[11][12][13][14] have extensively been developed to synthesize nano-spinel ferrite with different sizes and shapes. Ball milling method is favorable to produce a highly crystalline nanostructure, but always leads to agglomeration in high reaction temperature and long time.…”

Monitoring Time-Progression of Structural, Magnetic Properties of Ni Nano Ferrite During Synthesis

“…(ranging between 11.7 -25.5 Am 2 /kg) as compared to the multi-domain bulk Ni ferrite (55 Am 2 / kg) is attributed to the two-component nanoparticle system as described in [19] consisting of a spin-disorder on the surface layer and ferrimagnetically aligned spins within the core. Computed magnetic dead layer thickness as described in [20,21] 1: Variation of experimental and theoretical lattice parameter (a exp., a th. ), inversion parameter (), oxygen parameter (u), Cation distribution (for A, B site), and observed, calculated intensity ratios for I400/422, I220/400 plane for the studied samples.…”