Amorphous thin films of ferroelectric oxides

摘要

Amorphous thin films of ferroelectric LiNbO$-3$/ and Pb(Zr$-0.52$/Ti$- 0.48$/)O$-3$/ were prepared on a variety of substrates. Their properties were characterized in comparison with typical ferroelectric crystal behavior. It was found that these amorphous thin films show ferroelectric-like behaviors well before being crystallized. These findings suggest possible practical applications in areas where ferroelectric crystals are routinely in use. A structural model is proposed to account for the ferroelectric-like behaviors in the amorphous phases.