2017年3月
Improper Ferroelectricity in Stuffed Aluminate Sodalites for Pyroelectric Energy Harvesting
PHYSICAL REVIEW APPLIED
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 7
- 号
- 3
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevApplied.7.034012
- 出版者・発行元
- AMER PHYSICAL SOC
In the present study, we demonstrate ferroelectricity in stuffed aluminate sodalites (Ca1-xSrx)(8)[AlO2](12)WO4)(2) (x <= 0.2) (C(1-x)S(x)AW). Pyroelectric measurements clarify switchable spontaneous polarization in polycrystalline C(1-x)S(x)AW, whose polarization values are on the order of 10(-2) mu C/cm(2) at room temperature. A weak anomaly in the dielectric permittivity at temperatures near the ferroelectric transition temperature suggests improper ferroelectricity of C(1-x)S(x)AW for all investigated values of x. A comprehensive study involving synchrotron x-ray powder diffraction measurements, molecular dynamics simulations, and first-principles calculations clarifies that the ferroelectric phase transition of C(1-x)S(x)AW is driven by the freezing of the fluctuations of WO4 tetrahedra in the voids of an [AlO2](12)(12-) framework. The voltage response and electromechanical coupling factor of C(1-x)S(x)AW estimated from the present results indicate that this material exhibits excellent performance as a pyroelectric energy harvester, suggesting that aluminate sodalites exhibit great promise as a class of materials for highly efficient energy-harvesting devices.
- リンク情報
-
- DOI
- https://doi.org/10.1103/PhysRevApplied.7.034012
- arXiv
- http://arxiv.org/abs/arXiv:1611.05115
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000399280700001&DestApp=WOS_CPL
- URL
- http://arxiv.org/abs/1611.05115v1
- URL
- http://arxiv.org/pdf/1611.05115v1 本文へのリンクあり
- ID情報
-
- DOI : 10.1103/PhysRevApplied.7.034012
- ISSN : 2331-7019
- arXiv ID : arXiv:1611.05115
- Web of Science ID : WOS:000399280700001