Comparative study on aging effect in BiFeO3 thin films substituted at A- and B-site

Xi Wang; Guangda Hu; Ling Cheng; Changhong Yang; Weibing Wu

doi:10.1063/1.3672212

Comparative study on aging effect in BiFeO3 thin films substituted at A- and B-site

Materials Science 2011-12-30 v2

Authors: Xi Wang , Guangda Hu , Ling Cheng , Changhong Yang , Weibing Wu

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Abstract

Typical characteristics of aging effect, double hysteresis loops, were observed in (100)-oriented Bi0.95Ca0.05FeO3 (BCFO) and BiFe0.95Ni0.05O3 (BFNO) films grown on LaNiO3(100)/Si substrates. The double hysteresis loops for BCFO film become less "constrained" with increasing applied voltage compared to that for BFNO, indicating that the aging effect is more severe in the latter. This can be demonstrated by the lower leakage current and smaller dielectric constant for BFNO. These phenomena are explained based on the crystal structure and defect chemistry. The defect states of the Bi, Ca, Fe, Ni and O ions were clarified by the XPS data.

Cite

@article{arxiv.1110.2818,
  title  = {Comparative study on aging effect in BiFeO3 thin films substituted at A- and B-site},
  author = {Xi Wang and Guangda Hu and Ling Cheng and Changhong Yang and Weibing Wu},
  journal= {arXiv preprint arXiv:1110.2818},
  year   = {2011}
}

Comments

15 pages, 5 figures, accepted by Applied Physics Letters

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