Enhanced Piezoresponse and Dielectric Properties for Ba1-XSrXTiO3 Composition Ultrathin Films by the High-Throughput Method

Coatings

Hong Fang¹  Yue Han¹  Jie Wang¹  Qixiang Wang¹  Jinrui Guo²  Miaojuan Ren²  Bin He²  Chaoqun Shi²  Peng Zhang²  Yanan Chen²  Nana Zhang²  Di Wang²  Weiming Lü² 

[1] Condensed Matter Science and Technology Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China;Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China;

关键词: high throughput;    BSTO composition ultrathin film;    ferroelectric;    dielectric properties;   

DOI  :  10.3390/coatings11121491

来源: DOAJ

【 摘 要 】

The stacked single-unit cell Ba_1-xSr_xTiO₃ (BSTO) thin film designed by the high-throughput method is fabricated by layer-by-layer deposition by laser molecular beam epitaxy, and its ferroelectric and dielectric characteristics as a function of Sr concentration are comprehensively investigated. The permittivity of BSTO exhibits a monotonous increase by Sr with a plateau in the region of 14% < Sr < 85%. Meanwhile, at the low Sr doping regime, the piezoelectric response has been discovered, and the maximum piezoresponse and d₃₃ can reach approximately 139.05 pm and 88 pm/V once an appropriate Ba/Sr ratio is formed, exhibiting a coexistence of a dielectric property and giant piezoresponse. This effective piezoelectric constant d₃₃ value is significantly larger than the conventional chemical doping scenarios, suggesting that the intra-plane interaction is crucial for designing future promising dielectric and ferroelectric thin films via high-throughput technologies.

【 授权许可】

Unknown