The interaction energy of parallel Bloch walls

The paper gives an exact calculation of the interaction energy of parallel 180° Bloch walls of an unbounded uniaxial ferromagnetic as a function of their distance s and of the external field. The general relation, valid for a periodic domain structure, is specialised for the case of two Bloch walls.The author wishes to thank F. Kroupa and V. Janovec, of the Institute, for their valuable suggestions.