Effect of Ball Milling Methods on Structural and Electrical Properties of La(FeSi)13 Alloys

Abstract

The ball milling technique has shown a great interest in the synthesis of magnetocaloric materials. In this study, the effect of ball milling methods on the structural and electrical properties of La(FeSi)₁₃ alloys have been analyzed. The changes in the structural properties are studied by X-ray Diffraction and Raman spectroscopy. The results showed significant changes in the structural behaviour with the coexistence of the α-Fe phase as the milling time increases. The 2-hours milled sample provided the main structure of La(FeSi)₁₃ phase with the lowest percent of Alpha-Fe (alpha-Iron) as an impurity structure, while the 4-and 6-hour records a higher value of Alpha-Fe (alpha-Iron). This finding has also been supported by electrical properties measured with the impedance analyzer. The Structural behaviour is associated with dielectric properties, where the permittivity and dielectric loss (tan delta) graph that corresponds to a frequency (Hz) up to 100 kHz shown that the 2- hours milling time La(FeSi)₁₃  compound has a higher permittivity than the 4-hours and 6-hours samples which make it had higher energy and required less frequency to react.