BiFe O3 -based composite films with excess iron content were fabricated, and the dependence of their magnetic and ferroelectric properties on the excess iron content was systematically investigated. Structural and magnetic analyses indicated that the specimens might be composed of large antiferromagnetic BiFe O3 grains and small ferromagnetic component. When the iron content was increased, saturation magnetization (Ms) increased and remanent polarization decreased. Antiferromagnetic coupling (Hex) between the antiferromagnetic BiFe O3 grains and the ferromagnetic grains was observed at 10 K. It was revealed that grain growth is the key to increasing Ms and Pr and observing Hex at room temperature in BiFe O3 -based composite films.
ASJC Scopus subject areas
- Physics and Astronomy(all)