Ferroelectricity in highly ordered arrays of ultra-thin-walled Pb(Zr,Ti)O3 nanotubes composed of nanometer-sized perovskite crystallites.
We report the first unambiguous ferroelectric properties of ultra-thin-walled Pb(Zr,Ti)O 3 (PZT) nanotube arrays, each with 5 nm thick walls and outer diameters of 50 nm. Ferroelectric switching behavior with well-saturated hysteresis loops is observed in these ferroelectric PZT nanotubes with P r and E c values of about 1.5 microC cm (-2) and 86 kV cm (-1), respectively, for a maximum applied electric field of 400 kV cm (-1). These PZT nanotube arrays (10 (12) nanotubes cm (-2)) might provide a competitive approach toward the development of three-dimensional capacitors for the terabyte ferroelectric random access memory.
Department of Physics, Chonbuk National University, Jeonju 561-756, Korea.
Jongok
J
Kim
Sun A
SA
Yang
Yong Chan
YC
Choi
Jin Kyu
JK
Han
Keum Ok
KO
Jeong
Yong Ju
YJ
Yun
Dong Jik
DJ
Kim
Sang Mo
SM
Yang
Doohee
D
Yoon
Hyeonsik
H
Cheong
Ki-Seog
KS
Chang
Tae Won
TW
Noh
Sang Don
SD
Bu