Ginzburg-Landau theory for the conical cycloid state in multiferroics: applications to CoCr${}_2$O${}_4$

Chuanwei Zhang, Sumanta Tewari, John Toner +1

We show that the cycloidal magnetic order of a multiferroic can arise in the absence of spin and lattice anisotropies, for e.g., in a cubic material, and this explains the occurren…