Abstract
In order to improve the magnetic properties of Nd–Fe–B thick film magnets prepared by pulsed laser deposition, high-speed crystallization method of a pulse annealing was adopted as a postannealing process. In the case of using a Nd2.4Fe14B target, the pulse annealing under an optimum condition for the period of 1.8s enabled us to enhance the coercivity by approximately 300kA∕m compared with the average value of samples annealed by a conventional method. The obtained sample whose composition was almost as same as the target’s one had the large coercivity of approximately 1300kA∕m, and values of remanence and (BH)max were 0.62T and 64kJ∕m3, respectively. It was also clarified that use of a Nd2.2Fe14B target together with the pulse annealing method is effective to increase remanence and (BH)max although the coercivity value decreased.
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