Radiation damage and its recovery in focused ion beam fabricated ferroelectric capacitors

Journal Article

Stanishevsky, A, B Nagaraj, J Melngailis, Ramamoorthy Ramesh, L Khriachtchev, E McDaniel

10.1063/1.1489069

We studied the effect of ion damage on the properties of 50 keV Ga + focused ion beam fabricated lead-zirconate-titanate capacitors as a function of the ion dose. We observed significant modification in the chemical composition of the damaged layer due to loss of lead and oxygen, and gallium impurity accumulation. The 5-10 nm thick damaged layer becomes dielectric after annealing and does not recover its ferroelectric properties. This dielectric layer substantially reduces the actual volume of the ferroelectric material in sub-100 nm structures, and can affect their performance. © 2002 American Institute of Physics.

Journal of Applied Physics

92

2002

00218979

cited By 55

Ramesh Lab