Analysis of Domain-Wall Motion in Canted Antiferromagnets

The equation of motion for a domain wall in a canted, orthorhombic antiferromagnet has been solved. The analysis shows that the mobilities for Bloch and Néel walls are nearly alike for small applied fields in materials like YFeO3 and that a great similarity exists with wall motion in ordinary magnetic materials. The main difference between the present and previous expressions for wall velocity is in the functional dependence for the value of the applied field above which deviations from the simple low-field solution occur. However, this field turns out for YFeO3 to be numerically about the same that is obtained by considering the YFeO3 to be simply a weak ferromagnet.