抄録
Spatial variations of the spin axes and strain components in twin walls (T-walls) in antiferromagnetic NiO are studied theoretically. Exchange energy, dipolar energy and elastic energy determine these variations. An exact solution is obtained in the case of 90° wall. The wall width in this case is found to be about 40 Å and the self-energy to be 3.5 erg/cm2. Approximate solutions are obtained in the case of 180° wall and 60° wall. Possible orientations of T-walls as well as those of S-walls which separate different magnetic domains in a twin-free domain are discussed on the basis of the compatibility conditions of elasticity theory.
