Relaxor behavior of ferroelectric Ca0.22Sr0.12Ba0.66Nb2O6
Relaxor behavior of ferroelectric Ca0.22Sr0.12Ba0.66Nb2O6
复制标题
DOI：
10.1063/1.4775686
复制
发表时间：
2013-01
影响因子：
4
通讯作者：
C. S. Pandey;J. Schreuer;M. Burianek;M. Mühlberg
中科院分区：
文献类型：
--
作者：
C. S. Pandey;J. Schreuer;M. Burianek;M. Mühlberg
用共振超声光谱法和热膨胀法研究了四钨青铜单轴弛豫铁电钙锶钡（Ca0.22Sr0.12Ba0.66Nb2O6或CSBN 22）单晶在300 K-1503 K温度范围内的弛豫行为。热膨胀产生伯恩斯温度TB和中间特征温度T* 的证据，这也是由弹性常数cij的温度演变支持。发现CSBN-22的弹性刚度比CBN-28的弹性刚度大2%-3%。所呈现的结果为理解CSBN的放松行为打开了视角。
The relaxor behavior of tetragonal tungsten bronze uniaxial relaxor ferroelectric calcium strontium barium niobate (Ca0.22Sr0.12Ba0.66Nb2O6 or CSBN-22) single crystal was studied by measuring elastic constants and thermal expansion with the aid of resonant ultrasound spectroscopy and dilatometry, respectively, in the temperature range 300 K–1503 K. Thermal expansion yields evidence of the Burns temperature TB and the intermediate characteristic temperature T*, which was also supported by the temperature evolutions of the elastic constants cij. CSBN-22 was found to be ∼2%–3% elastically stiffer than CBN-28. The presented results open the perspective to understand the relaxor behavior of CSBN.