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Author Boscolo, I. ♦ Cialdi, S.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword MATERIALS SCIENCE ♦ CATHODES ♦ CERAMICS ♦ DIELECTRIC MATERIALS ♦ ELECTRON EMISSION ♦ ION SOURCES ♦ PHYSICS ♦ TAIL ELECTRONS
Abstract We show that electron emission from a relaxor ferroelectric cathode varies with the temperature as the dielectric constant. Consequently, there is no variation when the material makes the antiferroparaelectric phase transition. In addition, we have found that the emission increases with the polarizability of the material. The emission is originated by an induced change of the normal and/or spontaneous polarization. The maximum efficiency of the process, that is the ratio between the emitted charge of energetic electrons and the charge supplied to the sample by the excitation pulse, resulted in about 20%. The good emission of energetic electrons from a ceramic cathode at few hundred degrees temperature, makes this kind of cathode a proper electron injector for ion sources. {copyright} 2001 American Institute of Physics.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-06-18
Publisher Place United States
Journal Applied Physics Letters
Volume Number 78
Issue Number 25


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