Effect of Al on the magnetic properties of Pr<inf>3</inf>(Fe <inf>1-x</inf>Al<inf>x</inf>)<inf>27.5</inf>Ti<inf>1.5</inf> (x=0.1, 0.2, and 0.3)

The effect of Al on the structural and magnetic properties of Pr3 (Fe1-x Alx) 27.5 Ti1.5 (x=0.1, 0.2, and 0.3) compounds has been investigated by x-ray-diffraction, magnetization, and Curie temperature measurements. All these compounds have formed in monoclinic symmetry with A2m space group with Pr(Fe,Ti) 12 as secondary phase and traces of α-Fe. The monotonic decreases in MS both at 300 and 80 K are discussed on the basis of electron transfer from the 3p band of Al to the 3d band of Fe near EF. The variations in TC are explained using the Friedel approach. In all the compounds, the easy magnetization direction is away from the b axis. © 2006 American Institute of Physics.