Nanocomposite Thick-Film Magnets with ${{\hbox {Nd}}\hbox {-}{\hbox {Fe}}\hbox {-}{\hbox {B}}+\alpha \hbox {-}{\hbox {Fe}}}$ Phases Prepared under High Laser Energy De

The small spot size of a laser beam with the high energy density above 10 J/cm² enabled us to prepare an isotropic nanocomposite thick-film magnet with a high remanence value. In the as-deposited films, the structure of amorphous phase includes α-Fe grains by taking advantage of the emitting process of Fe and Nd atoms from an Nd-Fe-B target. Through a rapid annealing process, nanocomposite thick-films with Nd-Fe-B and α-Fe phases could be obtained. As a result, we succeeded in preparing a 16 μm-thick-film magnet with remanence, coercivity and (BH)_max values of approximately 1.0 T, 400 kA/m and 100 kJ/m³, respectively, indicating a promising material usable for a miniaturized cylindrical motor.