In response to the comment of Kenzelmann and Harris I show how the continuum theory of spiral multiferroics can be modified to describe general magnetic orders and discuss why the microscopic mechanism of magnetically-induced ferroelectricity usually makes such modifications unnecessary. This explains why the simple model with a single vector order parameter successfully describes thermodynamics and magnetoelectric properties of many spiral multiferroics.
Categories: cond-mat.str-el cond-mat.mtrl-sci