Repeatable electron emission from (Pb,La)(Zr,Ti)O3 ferroelectric cathodes using direct-current reset

Repeatable electron emission from (Pb,La)(Zr,Ti)O3 ferroelectric cathodes using direct-current reset

The use of ferroelectric (Pb,La)(Zr,Ti)O3 as a cathode material is investigated. It has been suggested in the literature that by rapidly changing or reversing the spontaneous polarization in the ferroelectric, a large charge imbalance can be produced at the surface of the material. The field from th...

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Veröffentlicht in:Applied physics letters 1994-11, Vol.65 (20), p.2612-2614
Hauptverfasser: Cavazos, T. C., Wilbanks, W. L., Fleddermann, C. B., Shiffler, D. A.
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container_end_page 2614
container_issue 20
container_start_page 2612
container_title Applied physics letters
container_volume 65
creator Cavazos, T. C.
Wilbanks, W. L.
Fleddermann, C. B.
Shiffler, D. A.
description The use of ferroelectric (Pb,La)(Zr,Ti)O3 as a cathode material is investigated. It has been suggested in the literature that by rapidly changing or reversing the spontaneous polarization in the ferroelectric, a large charge imbalance can be produced at the surface of the material. The field from this charge imbalance extracts bound carriers from the cathode. An approach to achieving this polarization change by using a negative bias field to preset the material prior to switching is discussed in this letter. This bias field can also be used to control the bound surface charge on the material. Emission currents on the order of 100 mA are observed and the emitted charge is on the order of 30 nC. Measurable emission occurs only when the material is driven into saturation.
doi_str_mv 10.1063/1.112584
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It has been suggested in the literature that by rapidly changing or reversing the spontaneous polarization in the ferroelectric, a large charge imbalance can be produced at the surface of the material. The field from this charge imbalance extracts bound carriers from the cathode. An approach to achieving this polarization change by using a negative bias field to preset the material prior to switching is discussed in this letter. This bias field can also be used to control the bound surface charge on the material. Emission currents on the order of 100 mA are observed and the emitted charge is on the order of 30 nC. Measurable emission occurs only when the material is driven into saturation.</abstract><doi>10.1063/1.112584</doi><tpages>3</tpages></addata></record>
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title Repeatable electron emission from (Pb,La)(Zr,Ti)O3 ferroelectric cathodes using direct-current reset
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