Abstract

The effects of Cu substitution on the crystal structure and magnetic properties of PrCo6.8−xCuxHf0.2 (x = 0–1.0) compounds were investigated by means of x-ray powder diffraction and magnetic measurements. The as-cast PrCo6.8−xCuxHf0.2 compounds crystallize in the TbCu7-type structure with the space group P6/mmm. The Curie temperature and magnetic anisotropy field decrease with increasing Cu content. A spin reorientation behaviour has been observed in the PrCo6.8−xCuxHf0.2 compounds. The addition of Cu weakens the anisotropy of the Co sublattice, leading to an increase in the spin reorientation temperature with increasing content of Cu.

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