Optical waveguides – Miscellaneous
Reexamination Certificate
2007-11-06
2007-11-06
Connelly-Cushwa, Michelle (Department: 2874)
Optical waveguides
Miscellaneous
C369S126000
Reexamination Certificate
active
11409740
ABSTRACT:
A method for switching the direction of polarization in a relatively small domain in a thin-film ferroelectric material whose direction of polarization is oriented normal to the surface of the material involves a step of moving an electrically-chargeable tip into contact with the surface of the ferroelectric material so that the direction of polarization in a region adjacent the tip becomes oriented in a preselected direction relative to the surface of the ferroelectric material. The tip is then pressed against the surface of the ferroelectric material so that the direction of polarization of the ferroelectric material within the area of the ferroelectric material in contact with the tip is reversed under the combined effect of the compressive influence of the tip and electric bias.
REFERENCES:
Abplanalp et al, “Higher Order Ferroic Switching by Scanning Force Microsopy”, Physical Review Letters, vol. 86, No. 25, 2001.
Abplanalp et al, “High Order Ferroic Switching by Scanning Force Microscopy” Physical Review Letters, vol. 86, No. 25, Jun. 2001.
Kohlstedt et al, “Size Effects on polarization in epitaxial ferroelectric films and the concept of ferroelectric tunnel junctions including first results”Mat.Res.Symp.Proc.vol. 688, 2002.
Morita et al, “Polarization reversal anti-parallel to the applied electric field observed using a scanning nonlinear dielectric microscopy” Applied Physics Letters, vol. 84, No. 2, Jan. 2004.
Baddorf Arthur P.
Gruverman Alexei L.
Kachanov Mark
Kalinin Sergei V.
Karapetian Edgar
Chu Chris H.
Connelly-Cushwa Michelle
McKee Michael E.
UT-Battelle LLC
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