Realizing a ferroelectric state and high pyroelectric performance in antiferroelectric-oxide composites

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 49; no. 28; pp. 9728 - 9734
• Main Authors: Li, Ling, Fang, Di, Wang, Rui-Xue, Shen, Meng, Zhang, Haibo, Tang, Yue-Feng, Zhang, Shan-Tao
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 21.07.2020
• Subjects: Antiferroelectricity; Composite materials; Ferroelectric materials; Perovskites; Room temperature; Transition temperature; Zinc oxide
• ISSN: 1477-9226; 1477-9234; 1477-9234
• DOI: 10.1039/d0dt01739f

We report a robust room temperature ferroelectric (FE) state in (1 − x )Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 0.933 Ti 0.067 ] 0.98 O 3 - x ZnO ((1 − x )PNZST- x ZnO) composites, where PNZST shows a predominant antiferroelectric (AFE) nature due to ZnO-induced internal strain. Upon heating, a FE-AFE transition occurs and generates high pyroelectric performance. The composite with x = 0.1 shows a peak pyroelectric coefficient of p = 2450.7 × 10 −4 C m −2 K −1 and figures of merit of current responsivity F i = 926.9 × 10 −10 m V −1 , voltage responsivity F v = 1334.3 × 10 −2 m 2 C −1 , and detectivity F d = 1194.8 × 10 −5 Pa −1/2 , which are about two orders of magnitude higher than those of most perovskite pyroelectric oxides. More interestingly, the FE-AFE transition temperature, i.e. , the temperature corresponding to peak pyroelectric performance, is tunable in a wide temperature range from 30 °C to 65 °C. This work not only provides a promising material candidate for high performance pyroelectric devices, but also an alternative idea to develop ferroelectric and pyroelectric properties based on antiferroelectric materials. We report a robust room temperature ferroelectric (FE) state in (1 − x )Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 0.933 Ti 0.067 ] 0.98 O 3 - x ZnO ((1 − x )PNZST- x ZnO) composites, where PNZST shows a predominant antiferroelectric (AFE) nature due to ZnO-induced internal strain.