| 摘要 |
At least one ion 6 selected from Cr, Al, Nb and Mo is locally implanted into a thin film 4 containing, as main components, at least one of Fe and Co and at least one of Pd and Pt and a boron ion 20 is then implanted into a whole surface of the thin film subjected to the implantation, and a heat treatment is thereafter carried out, and a portion 7 into which at least one ion 6 selected from Cr, Al, Nb and Mo and the boron ion 20 are implanted becomes a portion 9 having a small coercive force and a portion 8 into which only the boron ion 20 is implanted becomes a portion 10 having a large coercive force.
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