Structural and magnetic properties of FeCoC system obtained by mechanical alloying

Abstract

Fe 96−x Co x C 4 (x = 0, 10, 20, 30, 40 at. %) alloys were obtained by mechanical alloying of Fe, C and Co powders using high-energy milling. The structural and magnetic properties of the alloy system were analyzed by X-ray diffraction, Scanning Electron Microscopy (SEM), Vibrating Sample Magnetometer (VSM) and Mössbauer Spectrometry at room temperature. The X-ray diffraction patterns showed a BCC-FeCoC structure phase for all samples, as well as a lattice parameter that slightly decreases with Co content. The saturation magnetization and coercive field were analyzed as a function of Co content. The Mössbauer spectra were fitted with a hyperfine magnetic field distribution showing the ferromagnetic behavior and the disordered character of the samples. The mean hyperfine magnetic field remained nearly constant (358 T) with Co content.

Tailoring Magnetic Properties of Fe0.65Co0.35 Nanoparticles by Compositing with RE2O3 (RE = La, Nd, and Sm)

“…The La-substituted Fe 0.65 Co 0.35 (3 h) presents the highest average hyperfine field (36.1 T), which is in close agreement with the values found by Zelenakova et al (36.16 T) [ 34 ]. For Nd- and Sm-substituted compositions, the average hyperfine field is about 35.0 T, which is in agreement with previous works for Fe–Co milled alloys [ 33 , 35 , 36 ]. The presence of RE elements in the Fe–Co structure may generate additional sextets in the Mössbauer spectra.…”

Thermal Characterization of Fe50Co50 and Fe65Co35 Nanostructured Alloys

“…In Colombia, there have been works about characterizations of Fe oxides nanostructured materials, where the AM method is most frequently used for the preparations of these materials. This way, from the AM method, the structure and magnetic properties of the system are considered (Pérez et al,2012, Rincón et al, 2017. Similarly, the preparation of nanostructured powders of Fe50Co50 composition and their morphological characterization by SEM and DRX has been reported in (Yepes et al, 2014).…”