Browsing by Author "Martínez-Blanco, David"

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Effect of Fe content on the structural and magnetic properties of ternary (Ni 60 Co 40 ) 100-x Fe x nanomaterials synthesized by hydrothermal route
(World Scientific, 2024) Gaci, Yacine; Guittoum, Abderrahim; Hemmous, Messaoud; Martínez-Blanco, David; Gorria, Pedro; Blanco, Jesús A.; Aouaroun, Tahar
The effect of iron content on the structure, morphology and magnetic properties of (Ni60Co40)100-xFex powders synthesized by hydrothermal method has been studied. Several samples have been elaborated for different Fe content (x = 0, 3, 5, 7, 10 and 13.5). The as- prepared samples have been characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Vibrating Sample Magnetometry (VSM). From XRD spectra and for all Fe content, we have shown the presence of both face centered cubic (FCC) and Hexagonal (HCP) nanosized phases. The lattice parameter increases with increasing Fe content and the grains size varies with Fe content to reach a minimum value of 32 nm for (Co40Ni60)90Fe10. From hysteresis curves, we have extracted the saturation magnetization, Ms, and the coercivity, Hc. We noticed that Ms increases and then decreases as a function of Fe content. The values of Hc vary from 156 Oe to 186 Oe depending on the particles shape.
Effect of Si addition on the structural, microstructural and magnetic properties of (Fe 70 Al 30 ) 100-x Si x nanostructured powders elaborated by mechanical alloying
(Elsevier, 2017) Hemmous, Messaoud; Guittoum, Abderrahim; Kezrane, M.; Boukherroub, N.; Martínez-Blanco, David; Gorria, Pedro; Blanco, Jesus A.; Souami, N.; Fennineche, N.