INTERPRETATION OF M - H LOOPS OF PERMANENT MAGNETS CONTAINING TWO HARD-MAGNETIC PHASES R. van Mens, A. J. C. v. d. Borst and M. Brouha J. Phys. Colloques, 49 C8 (1988) C8-677-C8-678 DOI: 10.1051/jphyscol:19888308