Abstract
Measurements of the low temperature thermal expansion of ferroelectric NaNO 2 along the ferroelectric b-axis have been performed with a three terminal capacitance dilatometer, both in single domain and multidomain state. A contribution, due to domain walls, is present when the sample is in multidomain state. An Einstein contribution with ϑ E ∼ 120 K is present in both domain-states of the sample.
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