The 14N electric field gradient tensors have been determined in the paraelectric phase at T = 26 °C and in the incommensurate phase at T = 16 °C. The results in the incommensurate phase are typical for the “non-local” case and show the presence of two out of phase components of the modulation wave. The phase shift between the linear and the quadratic terms in the expansion of the frequency in powers of the order parameter is as large as 45°.
Received: 1985-7-23
Published Online: 2014-6-2
Published in Print: 1986-2-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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