Effect of Zn substitution on morphology and magnetic properties of CuFe2O4 nanofibers

Structural analysis and cations distribution of nanocrystalline Ni1−Zn Fe1.7Ga0.3O4

“…Similar result was obtained in Zn doped Copper ferrite nanofibers [27] but it contradicted with Zn doped NiFe 2 O 4 nano particles [28], where the crystalline size decreases with increasing Zn substituted amount. In our case the presence of Ga in the matrix may be the factor which assists in change the behavior of the matrix.…”

Preparation, Structure and Catalytic Activity of Simple Spinel as Nano-Copper-Zinc Ferrites in Industry Model

“…But, the brown yellow tones color intensifies from batches CZFL1 to CZFL5 as the substitution degree of Zn +2 by Cu +2 increases. The crystallites size (D), the degree of strain (e) and lattice parameters determined from x-rays patterns are shown in The observed linear decrease of lattice constant with copper content x can be assigned to the large ionic radius of Zn 2+ (0.83 A 0 ) as liken to the ionic radius of Cu 2+ (0.76 A 0 ).The smaller ionic radii Cu 2+ replaces larger ionic radii Zn 2+ and the lattice parameters shows decreasing trend with increasing copper content 18 . The x-ray density of the Cu x Zn(1-x) Fe2O4 ferrites spinel has been calculated from the molecular weight of the unit cell by using the equation:…”

A review on electrospun magnetic nanomaterials: methods, properties and applications

“…[206][207][208][209][210][211][212] Typical dopants that have been explored to enhance the magnetic properties and direct the morphology of MNFs include graphene oxide (GO), 213 Co, 214 Ni, 215 Cu 210 and Zn. 216 215 It is important to note that the change in magnetic properties with dopant concentration is not always uniform 209 and can contradict known theories (such as Brown's theory 217 ) where M s and H c are inversely related. For example, the M s value of Zn-doped CuFe 2 O 4 NFs initially increases before decreasing with increasing Zn 2+ concentration due to increased exchange interaction between ions within the lattice.…”

“…For example, the M s value of Zn-doped CuFe 2 O 4 NFs initially increases before decreasing with increasing Zn 2+ concentration due to increased exchange interaction between ions within the lattice. 216 Co-Doped ZnO NFs were fabricated by electrospinning a PVA/Co-doped ZnO suspension followed by sintering in air. 218 Doping ZnO NFs with 1.8-7.2 wt% Co was shown to change the material properties from ferromagnetism to ferrimagnetism, as shown by the temperaturedependent magnetisation curves and Curie-Weiss fits in Fig.…”