THE EFFECT OF ANTIPHASE BOUNDARIES IN MAGNETIC SUPERLATTICES ON THE DOMAIN STRUCTURE OBSERVED BY LORENTZ MICROSCOPY A. J. LAPWORTH, J. P. JAKUBOVICS and G. S. BAKER J. Phys. Colloques, 32 C1 (1971) C1-259-C1-260 DOI: 10.1051/jphyscol:1971185