Improvement in Magnetic Properties of PLD-Made Nd-Fe-B Thick Film Magnets

Coercivity of pulsed laser deposition (PLD)-fabricated Nd-Fe-B thick film magnets were enhanced by synergistic use of an additive (Zr, Nb or Ga) and an adoption of pulse annealing as a high-speed crystallization method. The role of the additives and the pulse annealing mainly work on the increase of coercivity without the deterioration of remanence and (BH) max· For example, after pulse annealing of an as-deposited film prepared from a Nd 2.6Fe 14B + Ga 0.5 at.% target, the obtained coercivity reached approximately 1700 kA/m. We also found that (BH) max value reaches approximately 70 kJ/m 3 by reducing Nd content and adding Zr or Nb