Journal of Materials Research

Articles

Polarization reorientation in ferroelectric lead zirconate titanate thin films with electron beams

D.B. Lia1, D.R. Strachana2, J.H. Ferrisa3 and D.A. Bonnella3 c1

a1 Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104

a2 Department of Physics and Astronomy and Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104

a3 Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104

Abstract

Ferroelectric domain patterning with an electron beam is demonstrated. Polarization of lead zirconate titanate thin films is shown to be reoriented in both positive and negative directions using piezoresponse force and scanning surface potential microscopy. Reorientation of the ferroelectric domains is a response to the electric field generated by an imbalance of electron emission and trapping at the surface. A threshold of 500 μC/cm2 and a saturation of 1500 μC/cm2 were identified. Regardless of beam energy, the polarization is reoriented negatively for beam currents less than 50 pA and positively for beam currents greater than 1 nA.

(Received September 15 2005)

(Accepted January 05 2006)

(Online publication April 2006)

Key Words:

  • Electron irradiation;
  • Ferroelectric;
  • Film

Correspondence:

c1 Address all correspondence to this author. e-mail: bonnell@lrsm.upenn.edu

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