IMF2017

The multi order parameter systems and their cross responses are generally considered in linear response at low fields and are viewed as a continuous responses. Here we consider the cases when the responses for all order parameters, at higher fields and at temperature T = 0 are discontinuous. We report results for a model that incorporates metamagnetism as a magnetic response, metaelectricity as a dielectric response and the two fields interact in a bilinear term, representing the hidden field model. The results show a rich phase diagram, mutually dependent critical magnetic and electric fields and the evolution of all physical observables with temperature.