1. Scanning probe charge reading of ferroelectric domains.
- Author
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Kim, Byong M., Adams, Donald E., Quan Tran, Qing Ma, and Valluri Rao
- Subjects
- *
FERROELECTRIC crystals , *PIEZOELECTRICITY , *SCANNING probe microscopy , *POLARIZATION (Nuclear physics) , *MOLECULAR probes - Abstract
A scanning probe charge-detection technique based on direct piezoelectric effect is demonstrated to read alternating bit polarizations in a ferroelectric media The bit signal is generated by spatially modulating charges interacting with a probe tip scanning in contact with the media. A periodicity of the bits is used with an appropriate scan speed to modulate the signal frequency. A signal-to-noise ratio of 10 dB has been achieved for a contact force of 100 nN. The modulation of the bit signal frequency into the 2 kHz data rate is achieved by coupling 0.4 μm spacing between alternating polarizations with scanning speed of 1.6 mm/s. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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