Phase Separation of Bismuth Ferrite into Magnetite under Voltage Stressing
arXiv:cond-mat/0703388 · doi:10.1063/1.2752724
Abstract
Micro-Raman studies show that under ~700 kV/cm of d.c. voltage stressing for a few seconds, thin-film bismuth ferrite BiFeO3 phase separates into magnetite Fe3O4. No evidence is found spectroscopically of hemite alpha-Fe2O3, maghemite gamma-Fe2O3, or of Bi2O3. This relates to the controversy regarding the magnitude of magnetization in BiFeO3.
9 pages and 2 figures