Abstract
We propose a model for an electric field-driven transition from the ordered NaCI-type phase to the disordered phase. Such a transition might be a prototype of charge disordering transition observed in Pr 1-c Ca c MnO 3. We assume the lattice-gas model and hopping conductivity of charge carriers. The solution of this model, performed by the Monte Carlo method, demonstrates that considerably high electric field can disorder well-ordered phases The comparison with the data for charge disordering in Pr 1-c Ca c MnO 3 shows that required fields are much too high. We analyze the obtained results trying to determine a possible scenario for conductivity in Pr 1-c Ca c MnO 3 .
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