Effect of Crystallite Size on Magnetic Properties of Nanostructured FeAlTiBZr Alloy

This study investigates the influence of crystallite size (D) on two key magnetic parameters, saturation magnetization (MS) and coercivity (HC), in nanostructured FeAlTiBZr alloy. The fabrication of this nanostructured material involved a mechanical grinding process. Structural, morphological, and magnetic properties of the nanostructured FeAlTiBZr alloy at various production stages were thoroughly examined using advanced characterization techniques, including Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), and Vibrating Sample Magnetometer (VSM). The crystallite size decreased from 38 to 26 nm, while the lattice strain increased from 0.17933% to 0.25194%. This shift in lattice parameters, from 0.2867 to 0.2876, can be attributed to the milling time effect. Additionally, the morphology of particles underwent changes, with particle size increasing over the milling period. However, the magnetic properties exhibited a contrasting trend: coercivity, saturation magnetization, remanence magnetization, and squareness decreased from 55.78 Oe, 77.35 emu/g, 3.08 emu/g, and 0.039 to 42.83 Oe, 66.39 emu/g, 2.04 emu/g, and 0.030, respectively.