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 x less than or equal to 0.2, then decreases with increase of the Y content. The exchange field coefficient n(RCo) 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 H-crit(H) decreases with increase of the Y content.