title: A training effect on electrical properties in nanoscale BiFeO3.
abstract: 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 the 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(-1) 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.
authors.affiliation: Nanostructured Materials Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India.
authors.forename: Sudipta
authors.initials: S
authors.lastname: Goswami
authors.forename: Dipten
authors.initials: D
authors.lastname: Bhattacharya
authors.forename: Wuxia
authors.initials: W
authors.lastname: Li
authors.forename: Ajuan
authors.initials: A
authors.lastname: Cui
authors.forename: QianQing
authors.initials: Q
authors.lastname: Jiang
authors.forename: Chang-zhi
authors.initials: CZ
authors.lastname: Gu
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004553:Electric Conductivity; D004579:Electron Transport; D005290:Ferric Compounds / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties; D013696:Temperature
chemical_list: D005290:Ferric Compounds; D046911:Macromolecular Substances; C000499:ferric oxide; D001729:Bismuth