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The effect of a severe mechanical milling treatment on the microstructure, magnetic and magneto-caloric properties of Pr 2 Fe 17 powders is reported. Bulk alloys showing a rhombohedral Th 2 Zn 17 -type crystal structure were mechanically ball milled under Ar atmosphere. After 10h of milling this crystal structure persists and the mean values of the lattice parameters...
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