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PROBLEM TO BE SOLVED : To provide a permanent magnet capable of achieving the enhancement of corrosion resistance and the lowering of demagnetization. SOLUTION : This permanent magnet 1 is a permanent magnet produced by providing a buffer layer 3 comprising, for example a Cu layer on the surface of a magnet element 2 containing rare earth elements and by further providing a protecting layer 4 comprising an Ni-P-Cu layer having a Cu content x of 0
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