1
|
Li Z, Gong JM, Da B, Tóth J, Tőkési K, Zeng RG, Ding ZJ. Improved reverse Monte Carlo analysis of optical property of Fe and Ni from reflection electron energy loss spectroscopy spectra. Sci Rep 2023; 13:12480. [PMID: 37528114 PMCID: PMC10393999 DOI: 10.1038/s41598-023-38769-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 07/14/2023] [Indexed: 08/03/2023] Open
Abstract
The energy loss functions (ELFs) of Fe and Ni have been derived from measured reflection electron energy loss spectroscopy (REELS) spectra by a reverse Monte Carlo analysis in our previous work. In this work, we present further improvements of ELFs for these metals. For Fe, we have updated ELFs at primary electron energies of 2 keV and 3 keV in a wider photon energy region (0-180 eV) with a better accuracy, which is verified by sum rules. Regarding to Ni, we supplement the ELF at primary energy of 5 keV and we also improve the data accuracy at 3 keV. Applying these new and more accurate ELFs we present the optical constants and dielectric functions for the two metals. The improvements were highlighted by comparing our present results with the previous data.
Collapse
Affiliation(s)
- Z Li
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - J M Gong
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - B Da
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0044, Japan
| | - J Tóth
- Institute for Nuclear Research, P.O. Box 51, Debrecen, Hungary
| | - K Tőkési
- Institute for Nuclear Research, P.O. Box 51, Debrecen, Hungary.
| | - R G Zeng
- Institute of Materials, China Academy of Engineering Physics, P.O. Box 9071, Jiangyou, 621907, Sichuan, People's Republic of China
| | - Z J Ding
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
- Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
| |
Collapse
|
2
|
Yang TF, Zeng RG, Yang LH, Sulyok A, Menyhárd M, Tőkési K, Ding ZJ. Energy loss function of samarium. Sci Rep 2023; 13:3909. [PMID: 36890188 PMCID: PMC9995327 DOI: 10.1038/s41598-023-30770-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 02/28/2023] [Indexed: 03/10/2023] Open
Abstract
We present a combined experimental and theoretical work to obtain the energy loss function (ELF) or the excitation spectrum of samarium in the energy loss range between 3 and 200 eV. At low loss energies, the plasmon excitation is clearly identified and the surface and bulk contributions are distinguished. For the precise analysis the frequency-dependent energy loss function and the related optical constants (n and k) of samarium were extracted from the measured reflection electron energy loss spectroscopy (REELS) spectra by the reverse Monte Carlo method. The ps- and f-sum rules with final ELF fulfils the nominal values with 0.2% and 2.5% accuracy, respectively. It was found that a bulk mode locates at 14.2 eV with the peak width ~6 eV and the corresponding broaden surface plasmon mode locates at energies of 5-11 eV.
Collapse
Affiliation(s)
- T F Yang
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - R G Zeng
- Institute of Materials, China Academy of Engineering Physics, P.O. Box 9071, Jiangyou, 621907, Sichuan, People's Republic of China
| | - L H Yang
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - A Sulyok
- Centre for Energy Research, Research Institute for Technical Physics and Materials Science, ELKH, P.O. Box 49, H-1525, Budapest, Hungary
| | - M Menyhárd
- Centre for Energy Research, Research Institute for Technical Physics and Materials Science, ELKH, P.O. Box 49, H-1525, Budapest, Hungary
| | - K Tőkési
- Institute for Nuclear Research, ELKH, P.O. Box 51, Debrecen, Hungary.
| | - Z J Ding
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China. .,Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
| |
Collapse
|
3
|
Yang X, Li D, Ren ZH, Zeng RG, Gong SY, Zhou DK, Tian H, Li JX, Xu G, Shen ZJ, Han GR. Colossal dielectric performance of pure barium titanate ceramics consolidated by spark plasma sintering. RSC Adv 2016. [DOI: 10.1039/c6ra14741k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The pure BaTiO3 nanoceramics have a high permittivity up to 6 × 104 and a low dielectric loss. The polaron dipoles configured by oxygen vacancies and Ti3+ cations within grains could contribute to the colossal dielectric permittivity of the ceramics.
Collapse
|
4
|
Ruan Z, Zeng RG, Ming Y, Zhang M, Da B, Mao SF, Ding ZJ. Quantum-trajectory Monte Carlo method for study of electron–crystal interaction in STEM. Phys Chem Chem Phys 2015; 17:17628-37. [DOI: 10.1039/c5cp02300a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A quantum trajectory Monte Carlo method is developed to simulate electron scattering and secondary electron cascade process in crystalline specimen.
Collapse
Affiliation(s)
- Z. Ruan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - R. G. Zeng
- Science and Technology on Surface Physics and Chemistry Laboratory
- Mianyang
- P. R. China
| | - Y. Ming
- School of Physics and Material Science
- Anhui University
- Hefei
- P. R. China
| | - M. Zhang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - B. Da
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - S. F. Mao
- School of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Z. J. Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| |
Collapse
|
5
|
Ruan Z, Zhang M, Zeng RG, Ming Y, Da B, Mao SF, Ding ZJ. Simulation study of the atomic resolution secondary electron imaging. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5565] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Z. Ruan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - M. Zhang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - R. G. Zeng
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - Y. Ming
- School of Physics and Material Science; Anhui University; Hefei Anhui 230601 PR China
| | - B. Da
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - S. F. Mao
- School of Nuclear Science and Technology; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - Z. J. Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| |
Collapse
|