Enhanced relaxor behavior and thermal- and frequency-insensitive strain of (Na0.5Bi0.5)0.93Ba0.07Ti1 - x(Mn1/3Nb2/3)xO3 ceramics
Abstract
(Na0.5Bi0.5)0.93Ba0.07Ti1 - x(Mn1/3Nb2/3)xO3 ceramics (x = 0-0.02) were prepared, and their structure and property were investigated systematically. (Mn1/3Nb2/3)4+ doping shifts ferroelectric-relaxor transition temperature (TF-R) toward low temperature. Thus, ferroelectric order is suppressed and relaxor behavior is enhanced monotonously, as further evidenced by composition-dependent electrical properties and domain evolution from labyrinthian to nanodomain. As a result, the x = 0.010 ceramic yields a large room temperature field-induced strain of 0.37%, especially the strain is temperature- and frequency-insensitive with a variety of 4.3% and 4.1% in the ranges of 25-125 °C and 0.5-10 Hz, respectively. This work suggests that the low content (Mn1/3Nb2/3)4+ complex cation doping is an alternative method to effectively tune the electrical properties of Na0.5Bi0.5TiO3-based ferroelectrics.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- May 2020
- DOI:
- 10.1063/1.5143601
- Bibcode:
- 2020JAP...127s4101L