Structural and magnetic properties of the Y1−xThxFe3 and Lu1−xThxFe3 systems

The structural and magnetic properties of the pseudobinary Y1−xThxFe3 and Lu1−xThxFe3 systems, having the PuNi3 structure, have been investigated. For x≤0·3, the magnetization vs temperature behavior for both systems is consistent with a simple ferromagnetic iron sublattice. For x>0·3, both systems show anomalies in M vs T and M vs H data. Lattice constants for both systems show a monotonic increase with increasing thorium content. The anomalous magnetic behavior has been explained by a Friedel-oscillation mechanism.