We report our observation of the training effect on dc electrical properties in a nanochain of BiFeO3 as a result of large scale migration of defects under combined influence of electric field and Joule heating. We show that an optimum number of cycles of electric field within the range zero to ∼1.0 MV/cm across a temperature range 80-300 K helps in reaching the stable state via a glass-transition-like process in the defect structure. Further treatment does not give rise to any substantial modification. We conclude that such a training effect is ubiquitous in pristine nanowires or chains of oxides and needs to be addressed for applications in nanoelectronic devices.
@article{arxiv.1304.2118,
title = {A Training effect on electrical properties in nanoscale BiFeO$_3$},
author = {Sudipta Goswami and Dipten Bhattacharya and Wuxia Li and Ajuan Cui and QianQing Jiang and Chang-zhi Gu},
journal= {arXiv preprint arXiv:1304.2118},
year = {2015}
}
Comments
11 pages with 5 figures; published in Nanotechnology