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

Pramana: Journal of physics

XUEZHONG XU^1¹  ZHUO XU^2²  YANG LIU^1³ 

[1]Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an 710049, China^2

[2]Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China^3

[3]Northwest Institute of Nuclear Technology, Xi’an 710024, China^1

关键词: Electron emission;    metastable ferroelectric;    surface plasma;    emission charge;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Electron emission from antiferroelectric ($\rm{Pb_{0.99}Nb_{0.02})[(Zr_{0.80}Sn_{0.20})_{0.952}Ti_{0.048}]_{0.98}O_{3}}$ 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, $_{χi} (i = \rm{A, B, C})$, characterising the contribution of surface plasma to the total emission charge, was defined. It was found that the emission charge increases almost linearly with $_{χi}$. Our results are of great importance for a better understanding of electron emission in antiferroelectric/ferroelectric cathodes.

【 授权许可】

CC BY