| Issue |
EPL
Volume 102, Number 1, April 2013
|
|
|---|---|---|
| Article Number | 17003 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/102/17003 | |
| Published online | 12 April 2013 | |
Diffuse critical point in PLZT ceramics
1 Institute Jožef Stefan - Jamova 39, 1000 Ljubljana, Slovenia, EU
2 Jožef Stefan International Postgraduate School - Jamova 39, 1000 Ljubljana, Slovenia, EU
3 Centre of Excellence NAMASTE - Jamova 39, 1000 Ljubljana, Slovenia, EU
Received: 19 March 2013
Accepted: 21 March 2013
The ferroelectric transition line in the electric-field temperature phase diagram of the canonical relaxor ferroelectric ceramics 9/65/35 PLZT has been studied via polarization and high-resolution heat capacity measurements. The modified calorimetric relaxation measurements show a change of the sample temperature if the applied electric field is sufficiently high to induce a ferroelectric transition. The anomaly in the sample temperature is a consequence of the released excess heat, i.e., latent heat at the transition from the disordered dipolar glass state to the long-range–ordered ferroelectric state. The presence of latent heat supports the well-established physical picture of relaxors according to the so-called dipolar glass scenario. Furthermore, it was found that latent heat decreases with increasing temperature, indicating the existence of a diffuse-type critical point.
PACS: 77.80.Jk – Relaxor ferroelectrics / Relaxor ferroelectrics – / 05.70.Jk – / Critical point phenomena – / 65.40.Ba – / Heat capacity –
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.