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Theoretical study on magnetocaloric effect and its electric-field regulation in CrI_(3)/metal heterostructure

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Science china(Physics,Mechanics & Astronomy) 2024年第2期67卷 134-141页

作者： Weiwei he Ziming Tang Qihua Gong Min Yi Wanlin Guo State Key Laboratory of Mechanics and Control for Aerospace Structures Key Laboratory for Intelligent Nano Materials and Devices of Ministry of EducationInstitute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNanjing 210016China MIIT Key Laboratory of Aerospace Information Materials and Physics College of PhysicsNanjing University of Aeronautics and AstronauticsNanjing 211106China

The extraordinary properties of a heterostructure by stacking atom-thick van der Waals(vdW)magnets have been extensively ***,the magnetocaloric effect(MCE)of heterostructures that are based on monolayer magnets remains to be ***,we deliberate MCE of vd W heterostructure composed of a monolayer CrI_(3)and metal atomic layers(Ag,Hf,Au,and Pb).It is revealed that heterostructure engineering by introducing metal substrate can improve MCE of CrI_(3),particularly boosting relative cooling power to 471.72μJ m^(-2)and adiabatic temperature change to 2.1 K at 5 T for CrI_(3)/*** improved MCE is ascribed to the enhancement of magnetic moment and intralayer exchange coupling in CrI_(3)due to the CrI_(3)/metal heterointerface induced charge *** field is further found to tune MCE of CrI_(3)in heterostructures and could shift the peak temperature by around 10 K in CrI_(3)/Hf,thus manipulating the working temperature window of *** theoretical results could enrich the research on low-dimensional magnetocaloric materials.

关键词： magnetocaloric effect heterostructure metal substrate

Microstructure of the Ductile Phase in Intermetallic Compound Ni_(50)Al_(20)Fe_(30)

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Journal of Materials Science & Technology 1994年第5期10卷 341-346页

作者： Lianlong he Shuhe WANG Jianting GUO and hengqiang YE (Lab. of atomic Imaging of Solids, institute of Metal Research, Academia Sinica, Shenyang, 110015, china)(To whom correspondence should be addressed) Lab of atomic Imaging of Solids Shenyang China

The microstructure of the single hot extruded and annealed Ni50Al20Fe30Y0.003 intermetallic compound alloys has been examined by means of high resolution electron microscopy (HREM). In these extruded and annealed alloys. the ductile phase is of a mixture of the disordered fcc γ matrix and or dered γ' precipitates. This fact well interprets the reason why the degree of annealing treatment can influence the strength and ductility of these alloys. The HREM observation revealed directly that there was some strain concentration at γ'-γ interfaces, due to the presence of more iron atoms in these two phases. The fixed orientation relationship between the γ phase and γ' precipitates was identified to be {001}γ||{00 }γ' and γ|| γ'

关键词： Fe Figure Microstructure of the Ductile Phase in Intermetallic Compound Ni Al

Probing the density dependence of the symmetry energy term

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Probing the density dependence of the symmetry energy term

n+239Pu Coupled Channel Optical Model and DWBA Calculations

同位旋物理与原子核的相变研讨会

作者： Zhuxia Li(china institute of atomic energy)

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中国核科技报告 1997年第S2期 35-39页

作者： Wang Shunuan (china institute of atomic energy, P.O. Box 275-41, beijing 102.13.

n+pu coupled channel optical model and DWBA calculations are performed by using ECIS95 and PRECISI codes. The calculated results of total cross section, reaction cross section, shape elastic and direct inelastic scattering cross sections and angular distributions getting from different methods are analyzed and compared. The different calculated methods used are reviewed.

关键词： SCC Pu Coupled Channel Optical Model and DWBA Calculations than line

Correlation of Behavior Changes and BOLD Signal in Alzheimer-like Rat Model

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 803-810页

作者： Zheng-Hui HU#, Xiao-Chuan WANG1#, Li-Yun LI3, Mai-Li LIU3, Rong LIU1, Zhiqun LING1, Qing TIAN1, Xiao-Wei TANG, Yi-Gen WU2*, and Jian-Zhi WANG1* Department of Physics and Bio-X disciplinary Laboratory, Zhejiang University, Hangzhou 310027,china 1 Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, china 2institute of High energy Physics and Key Laboratory of Nuclear Analysis Techniques, Chinese Academy of Sciences, P.O. Box 918, beijing 100039, china 3Wuhan institute of Physics and Mathematics, State Key Laboratory of Magnetic Resonance and atomic and Molecular Physics, Chinese Academy of Sciences, Wuhan 430071, china Department of Physics and Bio-X disciplinary Laboratory Zhejiang UniversityHangzhou 310027China Department of Pathophysiology Tongji Medical College Huazhong University of Science and TechnologyWuhan 430030 China Wuhan institute of Physics and Mathematics State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Chinese Academy of SciencesWuhan 430071 China institute of High energy Physics and Key Laboratory of Nuclear Analysis Techniques Chinese Academy of SciencesP.O. Box 918 Beijing 100039 China

To explore a potential means for the early diagnosis of Alzheimer disease, we studied the relationship of resting T2* signal and tau hyperphosphorylation/spatial memory deficit. The rat model with tau hyperphosphorylation and spatial memory deficit was established by bilateral hippocampi injection of isoproterenol (IP). Then, the correlative alteration between resting T2* signal and spatial memory retention was assessed with blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) study and Morris Water Maze test, and Western blot was employed to confirm tau hyperphosphorylation. The analysis showed following results. (1) Tau phosphorylation at Ser396/Ser404 and Ser199/Ser202 was signifi- cantly increased in IP-injected rats as detected by PHF-1 and tau-1, respectively. (2) An AD-like spatial memory retention disturbance was induced at 24 h after isoproterenol injection. (3) A sensitivity threshold of resting T2* signal intensity, which separated the IP-treated rats from vehicle control, was obtained by applying linear regression analysis, and an estimated sensitivity statistical threshold was at 32.62. These results suggest that resting T2* signal may serve as a noninvasive quantitative marker in predicting AD-like spatial memory deficits and tau hyperphosphorylation.

关键词： Alzheimer disease (AD) functional magnetic resonance imaging (fMRI) isoproterenol (IP) Morris Water Maze diagnosis

Effective DBHF Method

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Effective DBHF Method

Stability on the ^(109)Cd,^(65)Zn Complex with Humus Acids

CCAST“第二届粒子物理、核物理及宇宙学前沿问题”研讨会

作者： Zhong-yu Ma and Ling Liu china institute of atomic energy, beijing 102.13

A new decomposition of the Dirac structure of nucleon self-energies in the Dirac Brueckner-Hartree-Fock (DBHF) approach is adopted to investigate the equation of state for asymmetric nuclear matter. The effective coupling constants of σ, ω, δand p mesons with a density dependence in the relativistic mean field approach are deduced by reproducing the nucleon self-energy resulting from the DBHF at each density for symmetric and asymmetric nuclear matter. With these couplings the properties of finite nuclei are investigated. The agreement of charge radii and binding energies of finite nuc1ei with the experimental data arc improved simulta(?)y in comparison with the projection method. It seems that the properties of finite nuclei are sensitive to the scheme used for the DBHF self-energy extraction. We may conclude that the properties of the asymmetric nuclear matter and finite nuclei could be well described fay the new decomposition approach of the G matrix.

关键词： Effective DBHF Method

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Agricultural Sciences in china 2002年第5期1卷 520-525页

作者： HUA Luo, CheN Shi-bao, BAI Ling-yu and WEI Dong-pu( Geology Department, Capital Normal University, beijing 100037 , P.R.china institute for Application of atomic energy, Chinese Academy of Agricultural Sciences , beijing 100094 ,P.R. china ) Geology Department Capital Normal University Beijing 100037 P. R . China institute for Application of atomic energy Chinese Academy of Agricultural Sciences Beijing 100094 P. R. China institute for Application of atomic energy Chinese Academy of Agricultural Sciences Beijing 100094 P. R. China

The radioactive isotope tracer and ion exchange balanced method was used to study the stability of 109Cd, 65 Zn complexes with humus acids. In the 109Cd and 65 Zn single existing system with humic acids, the stability constants of the humic-109Cd(65Zn) complex compound was higher than the fulvic-109 Cd(65Zn) complex compound. The stability constant of the humic (fulvic) -65Zn was higher than that of the humic (ful-vic)-109Cd. In the 109Cd and 65 Zn coexisting system, the stability constant and the co-ordination number of the humic (fulvic)-65Zn complex obviously increased, but the stability constant and the co-ordination number of the humic (fulvic)-109Cd complex obviously decreased as compared with its respectively single existing system . The result showed that the humus matter with higher molecular weight could more effectively reduce plant availability of heavy metals than that with lower molecular weight in polluted soil by heavy metals. The humus matter could more effectively reduce plant availability of Zn than that of Cd. Application of humus-acid increased the harm of Cd and decreased the harm of Zn to plants in Cd-Zn coexisting system.

关键词： Humus acid Complex Cadmium Zinc Stability of complex Isotope tracer technique

Study of the primordial lithium abundance

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Science china(Physics,Mechanics & Astronomy) 2011年第S1期54卷 67-72页

作者： LI ZhiHong1, LI ErTao1, SU Jun1, LI YunJu1, BAI XiXiang1, GUO Bing1, WANG YouBao1, CheN YongShou1, HOU SuQing1, ZENG Sheng1, LIAN Gang1, SHI JianRong2 & LIU WeiPing1 1 china institute of atomic energy, beijing 102.13. china 2National Astronomical Observatories, Chinese Academy of Sciences, beijing 100012, china china Inst Atom energy Beijing 102413 Peoples R China Chinese Acad Sci Natl Astron Observ Beijing 100012 Peoples R China

Lithium isotopes have attracted an intense interest because the abundance of both 6Li and 6Li from big bang nucleosynthesis (BBN) is one of the puzzles in nuclear astrophysics. Many investigations of both astrophysical observation and nucleosynthesis calculation have been carried out to solve the puzzle, but it is not solved yet. Several nuclear reactions involving lithium have been indirectly measured at china institute of atomic energy, beijing. The Standard BBN (SBBN) network calculations are then performed to investigate the primordial Lithium abundance. The result shows that these nuclear reactions have minimal effect on the SBBN abundances of 6Li and 7Li.

关键词： big bang nucleosynthesis element abundance nuclear reaction network

MASS-SPRING MODEL USED TO SIMULATE The SLOSHING OF FLUID IN The CONTAINER UNDER The EARTHQUAKE

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MASS-SPRING MODEL USED TO SIMULATE THE SLOSHING OF FLUID IN ...