EFFECT OF SURFACE CONDITIONS ON COERCIVITIES FOR Nd-Fe-B MAGNETS Y. Otani, H. Miyajima, S. Chikazumi, S. Hirosawa and M. Sagawa J. Phys. Colloques, 49 C8 (1988) C8-641-C8-642 DOI: 10.1051/jphyscol:19888290