Investigation of electron and ion emission from the metal point contact on ferroelectrics

Sroubek, Zdenek
February 2002
Applied Physics Letters;2/4/2002, Vol. 80 Issue 5, p838
Academic Journal
Negative ion and electron emission from the point contact, formed by a tungsten tip on lead–zirconium–titanate, has been produced by the application of two successive negative and positive voltage pulses and analyzed by a time-of-flight (TOF) mass spectrometer. No positive ions were detected with the used small pulse amplitudes. The electron emission is strong and in a form of very short (<3.5 ns) pulses. The TOF analysis indicates that both ions and electrons are emitted by Coulomb repulsion of uncompensated surface charges around the W tip. © 2002 American Institute of Physics.


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