It is suggested that an adequate explanation of the switching current in barium titanate single crystals can be given by a domain model which includes an effective wall mass and a `viscous' opposition, but no depolarizing field and no specific representation of impurities or lattice imperfections. The form of the switching current and also its variations with the magnitude of the switching field can be derived, if the domain growth is controlled by the nucleation process, and if the nucleation rate lies within certain limits.
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J C Burfoot (1959) studied this question.
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