Abstract
**3**5Cl NOR relaxation measurements are used to derive the correlation times tau for the reorientation of both HCl and DCl dipoles in the ferroelectric phase of HCl-DCl mixed crystals. The tau s for DCl are reasonably consistent with a theoretical picture based on a dynamical Ising model in a transverse field which includes damping in a heuristic way. For the HCl dipoles this picture does not account for the tau s in the dilute limit of almost complete deuteration, where persistence of a quantum tunnelling contribution to the reorientations, namely short tau s, is observed, in spite of the coupling to the DCl dipoles with long correlation times.
| Original language | English |
|---|---|
| Pages (from-to) | 405-408 |
| Number of pages | 4 |
| Journal | Ferroelectrics |
| Volume | 54 |
| Issue number | 1-4 |
| State | Published - Jan 1 1983 |
| Externally published | Yes |
| Event | Proc of the Eur Meet on Ferroelectr, 5th - Malaga, Sp Duration: Sep 26 1983 → Sep 30 1983 |