Abstract
Levanyuk-Sannikov model is used to describe the ferroelectric-paraelectric transition in bulk and confined sodium nitrite (NaNO2). It is found on the basis of this model that the phase transition of NaNO2 for the bulk material is weakly first order whereas for the confined material it is a second order transition. Calculations are performed and the fitted parameters are obtained using this model for the ferroelectric-paraelectric transition in NaNO2. Our results indicate that the Levanyuk-Sannikov model describes adequately the observed behaviour of the ferroelectric-paraelectric transition in NaNO2.
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