Preparation of magnetic films using LIFT technique

Abstract In the study, laser induced forward transfer (LIFT) of magnetic materials such as α-Fe and Nd-Fe-B was performed to directly deposit on a substrate using YAG laser. Usage of an optical shatter and Galvano scanner enabled us to obtain LIFT-made films with a dotted pattern. Effects of conditions of laser irradiation on the deposited films were investigated. There was a threshold energy density for obtaining α-Fe dot patterns with LIFT. Energy density of laser beam enabled larger size of deposited dot patterns under the same laser spot size. In LIFT-prepared α-Fe films, atmosphere during the deposition strongly did not affect the crystalline structure. On the other hand, the deterioration of coercivity and squareness in LIFT-made Nd-Fe-B films was observed under low vacuum atmosphere of 10 Pa compared with those of LIFT-made ones in the high vacuum of 10-4 Pa. It was also confirmed that Nd-Fe-B films with coercivity of 290 kA/m on a paper could be deposited via a LIFT technique.