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Off-stoichiometry indexation of BiFeO_3 thin film on silicon by Rutherford backscattering spectrometry

Chinese Physics B 2018年第4期27卷 503-508页

作者： Ze-Song Wang Ren-Zheng Xiao Chang-Wei Zou Wei Xie Can-Xin Tian Shu-Wen Xue Gui-Ang Liu Neena Devi De-Jun Fu School of Physics and Technology Lingnan Normal University Zhanjiang 524048 China College of Mechanical and Power Engineering Three Gorges University Yichang 443002 China Key Laboratory of Artificial Micro- and Nano-Materials of Ministry of Education of China School of Physics and Technology Wuhan University Wuhan 430072 China

BiFeO3 is a multiferroic material with physical properties very sensitive to its ***3 thin films on silicon substrate are prepared by the sol–gel method combined with layer-by-layer annealing and final annealing schemes.X-ray diffraction and scanning electron microscopy are employed to probe the phase structures and surface *** Rutherford backscattering spectrometry to quantify the nonstoichiometries of BiFeO3 thin films annealed at 100？C–650？*** results indicate that Bi and Fe cations are close to the stoichiometry of BiFeO3,whereas the deficiency of O anions possibly plays a key role in contributing to the leakage current of 10^-5 A/cm^2 in a wide range of applied voltage rather than the ferroelectric polarizations of BiFeO3 thin films annealed at high temperature.

关键词： BiFeO3 thin films off-stoichiometry high temperature annealing backscattering spectrometry

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Structure, conductivity, and ion emission properties of RbAg4I5 solid electrolyte film prepared by pulsed laser deposition

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Chinese Physics B 2019年第6期28卷 126-130页

作者： Jun-Lian Chen Wen-Bin Zuo Xian-Wen Ke Alexander B Tolstoguzov Can-Xin Tian Neena Devi Ranjana Jha Gennady N Panin De-Jun Fu School of Printing and Packaging Wuhan UniversityWuhan 430072China Shenzhen Institute of Wuhan University A302 Research Bldg.No.6 Aoxin 2nd Rd.Nanshan Hitech ZoneShenzhen 518057China Ryazan State Radio Engineering University Gagarin Str.59/1390005 RyazanRussia School of Physics and Technology Lingnan Normal UniversityZhanjiang 524048China Department of Physics Netaji Subhas Institute of TechnologyUniversity of DelhiDwarka Sector-3New Delhi 110078India Institute of Microelectronics Technology Russian Academy of SciencesChernogolovkaMoscow 142432Russia

We fabricated a silver ion emitter based on the solid state electrolyte film of RbAg4 I5 prepared by pulsed laser deposition. The RbAg4 I5 target for PLD process was mechano-chemically synthesized by high-energy ball milling in Ar atmosphere using β-AgI and RbI as raw materials. The ion-conducting properties of RbAg4 I5 were studied by alternating current(AC) impedance spectroscopy and the ionic conductivity at room temperature was estimated 0.21 S/m. The structure, morphology, and elemental composition of the RbAg4 I5 film were investigated. The Ag+ ion-conducting property of the prepared superioni-conductor film was exploited for ion–beam generation. The temperature and accelerating voltage dependences of the ion current were studied. Few nA current was obtained at the temperature of 196?C and the accelerating voltage of 10 kV.

关键词： RbAg4 I5 ball milling solid state electrolyte film ion–beam source ionic conductivity

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Copper ion beam emission in solid electrolyte Rb_(4)Cu_(16)I_(6.5)Cl_(13.5)

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Chinese Physics B 2022年第4期31卷 239-243页

作者： Tushagu Abudouwufu Xiangyu Zhang Wenbin Zuo Jinbao Luo Yueqiang Lan Canxin Tian Changwei Zou Alexander Tolstoguzov Dejun Fu Key Laboratory of Artificial Micro and Nanostructures of Ministry of Education and Hubei Key Laboratory of Nuclear Solid Physics School of Physics and TechnologyWuhan UniversityWuhan 430072China Shenzhen Institute of Wuhan University Shenzhen 518057China Zhuhai Tsinghua University Research Institute Innovation Center Zhuhai 519000China School of Physics and Technology Lingnan Normal UniversityZhanjiang 524048China Utkin Ryazan State Radio Engineering University Ryazan 390005Russian Federation

Copper ion conducting solid electrolyte Rb_(4)Cu_(16)I_(6.5)Cl_(13.5)was prepared by means of mechano-chemical *** structure and morphology of the powder was investigated by x-ray diffraction and scanning electron *** grain size was estimated to be 0.2-0.9μm and the ionic conductivity at room temperature was approximately 0.206 S/*** solid electrolyte Rb_(4)Cu_(16)I_(6.5)Cl_(13.5)was exploited for copper ion beam *** copper ion emission current of several nA was successfully obtained at acceleration voltages of 15 kV and temperature of 197℃in vacuum of 2.1×10^(-4)Pa.A good linear correlation between the logarithmic ion current(logI)and the square root of the acceleration voltage(U_(acc))at high voltage range was obtained,suggesting the Schottky emission mechanism in the process of copper ion beam generation.

关键词： solid electrolyte mechano-chemical synthesis ion emission ion-beam source

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