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| 1 | Natural Passivity of Amorphous Fe_(40)Ni_(40)P_(14)B_6 and Fe_(54.6)Ni_(38)Si_(4.1)B_(2.3)V_1 Alloys显示文摘The natural passive films forrned on Fe40Ni40P14B6 and Fe54.6Ni38Si4.1B2.3V1 amorphous alloys long-term exposed in air have been studied by X-ray photoelectron spectroscopy (XPS) and Auger electron (including Ar+ ion depth profiling) spectroscopy (AES). The following aspects have been investigated: (1) chemical states of the elements in the films. binding energies and the chemical shifts measured by XPSf (2) structure and composition of the films fand (3) thickness of the passive films determined by AES depth profiling and XPS analysis. | Erdong LU and Pengshou XU(Hefei National Synchrotron Radiation Lab., University of Science and Technology of China, Hefei, 230026, China)Mingrong JI Maosheng MA and Xianming LIU(Structure Research Lab., University of Science and Technology of China, Hefe | 1994 | Journal of Materials Science & Technology1994，10，1： | 1 |
| 2 | Theoretical Studies on Band Structure and Optical Properties of 3C-SiC by FPLAPW显示文摘 | Xu Pengshou Xie Changkun | 2005 | Journal of Electron Spectroscopy and Related Phenomena2005，，144147： | 1 |
| 3 | Electronic structure of ZnO and its defects显示文摘 | Xu Pengshou Sun Yuming Shi Chaoshu Xu Faqiang Pan Haibin | 2001 | Science in China Series A: Mathematics2001，，9： | 1 |
| 4 | Theoretical calculations on the atomic and electronic structure of β-SiC(110) surface显示文摘We present a theoretical calculation of the atomic and electronic structure of β-SiC and its non-polar (110) surface using the full potential linear augmented plane wave (FPLAPW) approach. The calculated lattice constant and bulk modulus of p-SiC crystal are in excellent agreement with experimental data. The atomic and electronic structure of β-SiC(110) surface has been calculated by employing the slab and supercell model. It is found that the surface is characterized by a top-layer bond-length-contracting rotation relaxation in which the Si-surface atom moves closer towards the substrate while the C-surface atom moves outward. This relaxation is analogous to that of Ⅲ-Ⅴ semiconductor surface. The driving mechanism for this atomic rearrangement is that the Si atom tends to a planar sp2-like bonding situation with its three N neighbors and the N atom tends to a p3-like bonding with its three Si neighbors. Furthermore, surface relaxation induces the change from metallic to semiconducting | Changkun Xie Pengshou Xu Faqiang Xu Haibin Pan | 2002 | Chinese Science Bulletin2002，47，10： | 1 |
| 5 | Electronic structure of ZnO and its defects显示文摘 | Xu Pengshou Sun Yuming Shi Chaoshu Xu Faqiang Pan Haibin | 2001 | Science in China Series A: Mathematics2001，，9： | 1 |
| 6 | 显示文摘 | Xu Pengshou Sun Yuming Shi Chaoshu | 2001 | Science in China(A)2001，44，9： | 1 |
| 7 | Electronic structure of ZnO and its defects显示文摘 | Pengshou Xu Yuming Sun Chaoshu Shi Faqiang Xu Haibin Pan | | 0，，： | 1 |
| 8 | 显示文摘 | Xu Pengshou Sun Yuming Shi Chaoshu | 2001 | Science in China(A)2001，44，9： | 1 |
| 9 | Synchrotron radiation photoemission study on growth of gadolinium film over Ni(110)surface显示文摘The growth of Gd film on Ni(110) surfaco was studied by synchrotron radiation photoemission spectroscopy and XPS techniques. It is revealed that in the coverage range of 0—0.22 nm Gd4f core level showed a single-peak structure, therefore Gd film grows over Ni(110) in the layer-by-layer mode. However, when Gd coverage was larger than 0.22, nm the Gd4f peak turned gradually into double-peak and a double-peak structure with 2.3 eV separation was formed at 1.51 nm, meanwhile similar phenomenon was observed in the Gd4d XPS spectra. It is suggested that the double-peak structure of Gd4f was derived from the growth of Gd film in cluster mode and the Gd atomic clusters may exhibit different electronic states from Gd metal owing to their special structures. The Gd4f double-peak evolved into a single-peak on annealing at 600 K, implying that Gd clusters are thermodynamically unstable. | Faqiang Xu Junfa Zhu Yuming Sun Xianfeng Wang Erdong Lu Pengshou Xu Xinyi Zhang Shuxian Zhuang | 1999 | Chinese Science Bulletin1999，44，4： | 1 |
| 10 | Photoemission Studies of K-Promoted Nitridation of InP (100) Surface Using Synchrotron Radiation显示文摘The effect of molecular nitrogen exposure on the surfaces of InP(100)modified by potassium overlayers is investigated by core-level and valence-band photoemission spectroscopy using Synchrotron radiation.In comparison with InP(110)surface,we found the promotion is much stronger for InP(100)surface due to the central role of surface defects in the promotion;furthermore,in contrast with K-promoted oxidation of InP(100)where the bonding is observed between indium and oxygen,indium atoms did not react directly with nitrogen atoms during the K-promoted nitridation of InP(100). | ZHAO Texiu JI Hong LIANG Qi WANG Xiaoping XU Pengshou LU Erdong WU Jianxin XU Zhenjia | 1994 | Chinese Physics Letters1994，11，11： | 0 |
| 11 | The spin and orbital moment contributions of each element to macroscopic magnetization in Co_(0.9)Fe_(0.1) films显示文摘Co-Fe alloy films have such properties as high saturation magnetization, high Curie tem- perature and low coercive force. It is of importance to study the origin of high saturation magnetization in these alloys. In this paper, we study the spin (ms) and orbital moments (mo) of Fe and Co in the Co0.9Fe0.1 film by using X-ray magnetic circular dichroism (XMCD) and SQUID magnetometry. The ms and mo for Co are 1.58 and 0.31 μB, and for Fe are 1.63 and 0.36 μB respectively. The average magnetic moment (1.90 μB) determined by XMCD is in agreement with that obtained from SQUID measurements. The total magnetic moment ratio of Fe to Co is 10.5:89.5, while the ratio of the spin to orbital moment is 83.4:16.6. Considering the separation of the spin and orbital moment, an outcome of mFe-spin : mFe-orbit : mCo-spin : mCo-orbit = 8.6:1.9:74.8:14.7 is obtained. | GUO Yuxian WANG Jie LI Honghong XU Pengshou CAI Jianwang | 2006 | Chinese Science Bulletin2006，51，16： | 0 |
| 12 | Impact of the CoFe microstructure etched surface oxidation on Co spin and orbital moment显示文摘Patterned ferromagnetic thin film shows promising applications in ultra-high density magnetic storage,magnetoresistive transducer,magnetic random access memory and many other devices.Since the performance of these devices is closely associated with the magnetic properties of the etched patterns,it is necessary to study the effects of freshly etched surface oxidation on the magnetic properties of the patterned microstructures.In the current work,were carried out an X-ray Magnetic Circular Dichroism(XMCD) study on a 50 nm Co 0.9 Fe 0.1 continuous thin film and a related patterned Co 0.9 Fe 0.1 grating structure etched with a 2 μm period.Based on the sum rules,the spin and orbital moments were calculated for these two samples,respectively.The results indicated that the spin and orbital moments of grating structure(1.34μ B and 0.24μ B,respectively) decreased 17.3% compared with the corresponding continuous film(1.62μ B and 0.29μ B,respectively).We proposed that the moment decreasing of the patterned grating structure was mainly caused by the etched surface oxidation during the pattern manufacture process.The oxidation ratio of Co element in the patterned grating structure is 14.4% calculated from X-ray absorption spectroscopy(XAS) measurement.Considering the oxidation ratio,we amend the spin and orbital moment of Co and the amended result is basically in accordance with that of continuous film,demonstrating that the difference of the spin and orbital moments between the sub-micron grating unit and the continuous film is really caused by the oxidation. | GUO YuXian ZHANG ZiJun WANG Jie FU ShaoJun XU PengShou | 2013 | Science China Chemistry2013，56，3： | 0 |
| 13 | Electronic Structure in Cd_(0.96)Zn_(0.04)Te Compound: A Synchrotron Radiation Photoemission Study显示文摘We have studied the electronic structure of clean CdZnTe(111)compound using high resolution synchrotron radiation photoemission spectroscopy.Surface states were found in Cd,Te 4d core levels and valence band.The valence band measurement is in good agreement with theoretical calculations using linear muffin-tin orbit method. | YANG Fengyuan FANG Rongchuan XU Pengshou XU Shihong | 1994 | Chinese Physics Letters1994，11，10： | 0 |
| 14 | Alkali-metal Na Adsorption and Promoted Oxidation on Si(100)2×1 Surface显示文摘The alkali-metal Na adsorption on Si(100)2×1 surface and its promoted oxidation and Si oxidegrowth have been investigated by means of thermal desorption,work function,Auger electronspectroscopy and photoemission electron spectroscopy.The experimental data showed that therewas a new state,interface electron state,near the Fermi level after the deposition of Na atoms.It wasfound that the presence of Na always caused an increase of the oxygen initial uptake whereas thepromotion of Si oxide growth was observed only at the coverage of Na greater than 0.5 ML.A newmechanism of Na-promoted Si oxide growth is suggested in this paper. | Shihong XU Pengshou XU Mingrong JI Xianming LIU Maosheng MA Jingsheng ZHU Yuheng ZHANG Structure Research Laboratory,University of Science and Technology of China,Hefei,230026,ChinaZhenjia XU Institute of Semiconductor,Academia Sinica,Beijing,100083,China | 1993 | Journal of Materials Science & Technology1993，9，6： | 0 |
| 15 | Behavioral Feature and Correlative Detection of Multiple Types of Node in the Internet of Vehicles显示文摘Undoubtedly,uncooperative or malicious nodes threaten the safety of Internet of Vehicles(IoV)by destroying routing or data.To this end,some researchers have designed some node detection mechanisms and trust calculating algorithms based on some different feature parameters of IoV such as communication,data,energy,etc.,to detect and evaluate vehicle nodes.However,it is difficult to effectively assess the trust level of a vehicle node only by message forwarding,data consistency,and energy sufficiency.In order to resolve these problems,a novel mechanism and a new trust calculating model is proposed in this paper.First,the four tuple method is adopted,to qualitatively describing various types of nodes of IoV;Second,analyzing the behavioral features and correlation of various nodes based on route forwarding rate,data forwarding rate and physical location;third,designing double layer detection feature parameters with the ability to detect uncooperative nodes and malicious nodes;fourth,establishing a node correlative detection model with a double layer structure by combining the network layer and the perception layer.Accordingly,we conducted simulation experiments to verify the accuracy and time of this detection method under different speed-rate topological conditions of IoV.The results show that comparing with methods which only considers energy or communication parameters,the method proposed in this paper has obvious advantages in the detection of uncooperative and malicious nodes of IoV;especially,with the double detection feature parameters and node correlative detection model combined,detection accuracy is effectively improved,and the calculation time of node detection is largely reduced. | Pengshou Xie Guoqiang Ma Tao Feng Yan Yan Xueming Han | 2020 | Computers, Materials & Continua2020，，8： | 0 |
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