Peculiarity of Low Density Plasma-Assisted Charge Emission Produced at LATGS Crystal Surface

Abstract

Time and energy distribution measurements for a weak plasma-assisted electron and ion emission, initiated at the surface of L-α alanine doped TGS (LATGS) single crystals by a drive ac (500 Hz) electric field exceeding 5 × 10³ V/cm, have been performed especially at temperatures below as well as above phase transition. Time spectra of charges obtained at temperatures below phase transition are considerably different than that detected above phase transition; total number of charges registered under switching conditions is about an order higher than that produced during mere charging of the sample; time dependent energy spectra involve charges (electrons and ions) with energies up to a few hundreds of eV.

Keywords:

• Ferroelectrics
• LATGS
• Electron and ion emission
• Energy distribution

PACS:

• 77.84. Fa: 77.80. Fm: 79.90. +b