Abstract
In this letter, we report the electromechanical properties of textured 0.4Pb(Mg 1/3Nb 2/3)O 3-0.25PbZrO 3-0.35PbTiO 3 (PMN-PZT) composition which has relatively high rhombohedral to tetragonal (R-T) transition temperature (T R-T of 160 °C) and Curie temperature (T C of 234 C) and explore the effect of Mn-doping on this composition. It was found that MnO 2-doped textured PMN-PZT ceramics with 5 vol. BaTiO 3 template (T-5BT) exhibited inferior temperature stability. The coupling factor (k 31) of T-5BT ceramic started to degrade from 75 °C while the random counterpart showed a very stable tendency up to 180 °C. This degradation was associated with the "interface region" formed in the vicinity of BT template. MnO 2 doped PMN-PZT ceramics textured with 3 vol. BT and subsequently poled at 140 C (T-3BT140) exhibited very stable and high k 31 (>0.53) in a wide temperature range from room temperature to 130 C through reduction in the interface region volume. Further, the T-3BT140 ceramic exhibited excellent hard and soft combinatory piezoelectric properties of d 33 720 pC/N, k 31 0.53, Q m 403, tan δ = 0.3 which are very promising for high power and magnetoelectric applications.
| Original language | English (US) |
|---|---|
| Article number | 132908 |
| Journal | Applied Physics Letters |
| Volume | 100 |
| Issue number | 13 |
| DOIs | |
| State | Published - Mar 26 2012 |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors gratefully acknowledge the financial support from DARPA Heterostructural Uncooled Magnetic Sensors (HUMS) program (Properties) and Office of Basic Energy Science (Microscopy).