Abstract
An anomalous structural effect has been observed and analyzed on LiNbO3 at low temperature by neutron-diffraction experiments. Two minima in the unit-cell volume at 55 and 100 K related with maxima and minima in the volume vibrational isotropic factors of Li and Nb atoms, respectively, and a change in the curve slope of the spontaneous stress at 55 K have been identified. This fact, together with the shortening in distance of the Li and O layers at 55 K, has been related with variations in the Ps factor through the secondary pyroelectric effect.
| Original language | English |
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| Article number | 184108 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 72 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 1 Nov 2005 |
| Externally published | Yes |