![Bright Upconversion Emission, Increased
<i>T</i>
<sub/>c</sub>
, Enhanced Ferroelectric and Piezoelectric Properties in Er-Doped CaBi
<sub/>4</sub>
Ti
<sub/>4</sub>
O
<sub/>15</sub>
Multifunctional Ferroelectric Oxides]()
Bright Upconversion Emission, Increased
<i>T</i>
<sub/>c</sub>
, Enhanced Ferroelectric and Piezoelectric Properties in Er-Doped CaBi
<sub/>4</sub>
Ti
<sub/>4</sub>
O
<sub/>15</sub>
Multifunctional Ferroelectric OxidesPeng, Dengfeng; Wang, Xusheng; Xu, Chaonan; Yao, Xi; Lin, Jian; Sun, Tiantuo; Nino, J. · Journal of the American Ceramic Society · 2013