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The impact of surface plasma on the total emission charge from PZST cathode induced by nanosecond electric pulse

Abstract

Electron emission from antiferroelectric (\(\hbox {Pb}_{0.99}\hbox {Nb}_{0.02})\hbox {[(Zr}_{0.80}\hbox {Sn}_{0.20})_{0.952}\hbox {Ti}_{0.048}\hbox {]}_{0.98}\hbox {O}_{3}\) cathode has been investigated. The PZST cathode can maintain a metastable ferroelectric phase by the application of a high-enough field, thus implying three possibly pulse-loading configurations for electron emission measurements. The fact that emission charge is larger than the non-compensated charge indicates that the surface plasma contributes to the total emission charge. Furthermore, \(\chi _i \;(i=\text {A, B, C})\), characterising the contribution of surface plasma to the total emission charge, was defined. It was found that the emission charge increases almost linearly with \(\chi _i \). Our results are of great importance for a better understanding of electron emission in antiferroelectric / ferroelectric cathodes.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China – NSAF (Grant No. U1230116), the Ministry of Science and Technology of China through an 863-Project (No. 2014DAA8092015) and the National Key Laboratory of Shock Wave and Detonation Physics through a fund (No. LSD201201003).

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Correspondence to Yang Liu.

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Liu, Y., Xu, X., Xu, Z. et al. The impact of surface plasma on the total emission charge from PZST cathode induced by nanosecond electric pulse. Pramana - J Phys 92, 58 (2019). https://doi.org/10.1007/s12043-018-1708-9

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Keywords

  • Electron emission
  • metastable ferroelectric
  • surface plasma
  • emission charge

PACS Nos

  • 77.22.Ej
  • 77.80.Dj
  • 77.84.Cg