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The effect of Y substitution on the magnetic properties of the compound NdCo9.5V2.5

The Nd1−xYxCo9.5V2.5 compounds with x = 0–1 crystallize in the tetragonal ThMn12 structure. The lattice parameters a,c and the cell volume V decrease with increasing Y content. The Curie temperature increases for , then decreases with increase of the Y content. The exchange field coefficient nRCo was derived from the Curie temperature and follows the general trend of rare-earth–3d intermetallic interaction exchange. The high field saturation magnetization decreases with increase of the Y content. A domain wall pinning phenomenon was observed in all of the compounds and the substitution of Y for Nd makes this phenomenon less obvious. High field measurements of the magnetization show a field induced metamagnetic transition in each compound and the critical field HcritH decreases with increase of the Y content.