Energy storage and multiferroic properties of La-doped epitaxial BiFeO3 thin films according to La doping concentration

被引：15
|
作者：
Song, Hyunwook [1 ]
Son, Jong Yeog [1 ]
机构：
[1] Kyung Hee Univ, Inst Nat Sci, Dept Appl Phys, Integrated Educ Program Frontier Mat BK21 Four, Yongin 17104, South Korea
来源：
JOURNAL OF ENERGY STORAGE | 2023年 / 68卷
关键词：
Epitaxial BiFeO 3 thin films; La; -doping; Multiferroic properties; Energy storage characteristics;
D O I：
10.1016/j.est.2023.107729
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
La-doped epitaxial BiFeO3 (LBFO) thin films with La doping concentrations of 0, 10, 20, 25, and 30 % were deposited by pulsed laser deposition on Nb-doped single-crystal SrTiO3 substrates. The LBFO thin films doped with a La doping concentration of 10 % showed the best ferroelectric properties due to a large c/a ratio of about 1.04. As the concentration of La increased, the ferroelectric polarizations of the LBFO films decreased while the ferromagnetic properties steadily improved. In particular, the LBFO thin films tended to increase energy storage efficiency as the concentration of La increased, and the LBFO thin films with a La doping concentration of 30 % showed a high energy storage density of about 30.7 J/cm3.
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页数：6
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