Theoretical study of mutual control mechanism between magnetization and polarization in multiferroic materials*
Liu Yu, Zhai Liang-Jun, Wang Huai-Yu†
       
The internal energy (ascending curves) and free energy (descending curves) of configurations S ++ and S +- for (a) g =± 20 and (b) g =± 30. In each panel, the solid and dashed lines are identical.