Search Results - (Author, Cooperation:Z. D. Zhang)

Showing 1 - 20 results of 27, query time: 0.26s Refine Results
  1. 1
    Y. L. Tang ; Y. L. Zhu ; X. L. Ma ; A. Y. Borisevich ; A. N. Morozovska ; E. A. Eliseev ; W. Y. Wang ; Y. J. Wang ; Y. B. Xu ; Z. D. Zhang ; S. J. Pennycook
    American Association for the Advancement of Science (AAAS)
    Published 2015
    Staff View
    Publication Date:
    2015-04-18
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2012-02-22
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Disease/genetics ; Gene Expression ; Gene Frequency ; *Genetic Variation ; *Genome, Human ; Humans ; Phenotype ; Polymorphism, Single Nucleotide ; Proteins/*genetics ; Selection, Genetic
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    B Yu, H Li, W J Zhu, H F Liu, W W Liang, Z D Zhang and S Y Guo
    Institute of Physics (IOP)
    Published 2018
    Staff View
    Publication Date:
    2018-11-06
    Publisher:
    Institute of Physics (IOP)
    Print ISSN:
    1755-1307
    Electronic ISSN:
    1755-1315
    Topics:
    Geography
    Geosciences
    Physics
    Published by:
    http://www.iop.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2011-02-05
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    DNA Copy Number Variations/*genetics ; Gene Duplication/genetics ; Genetic Predisposition to Disease/genetics ; *Genetics, Population ; Genome, Human/*genetics ; *Genomics ; Genotype ; Humans ; Mutagenesis, Insertional/genetics ; Reproducibility of Results ; Sequence Analysis, DNA ; Sequence Deletion/genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Jonrinaldi, T Rahman, Henmaidi, E Wirdianto and D Z Zhang
    Institute of Physics (IOP)
    Published 2018
    Staff View
    Publication Date:
    2018-03-20
    Publisher:
    Institute of Physics (IOP)
    Print ISSN:
    1757-8981
    Electronic ISSN:
    1757-899X
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by:
    http://www.iop.org/

    Latest Papers from Table of Contents or Articles in Press
  6. 6
    Cui, B. Z. ; Sun, X. K. ; Liu, W. ; Geng, D. Y. ; Zhao, X. G. ; Zhang, Z. D.

    [S.l.] : American Institute of Physics (AIP)
    Published 2000
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The effects of a partial substitution of Cu or Nb for Fe on the structure and magnetic properties of mechanically alloyed Nd8Fe84Ti8 alloys were studied. Compared with Nd8Fe84Ti8 alloys prepared under the same conditions, the temperature necessary for the formation of the Nd(Fe, Ti)12 phase decreases from 900 to 750 °C with the addition of 3 at. % Cu. The addition of Cu hinders the nitrogenation of the Nd(Fe, Ti)12 phase. The pretreatment of hydrogenation on the Cu-added alloys at 300 °C facilitates the formation of nitrides. With increasing annealing temperature, the intrinsic coercivity of the nitrides increases until it attains a maximum at 850 °C. The addition of Nb is harmful to the formation of the perfect Nd(Fe, Ti)12 phase. For the 3 at. % Nb-containing alloys, annealing at 960 °C makes a metastable phase Nd(Fe, Ti)7 be formed. The addition of Nb is unfavorable for the intrinsic coercivity and the maximum magnetic energy product of the nitrides. © 2000 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.373323

    Articles: DFG German National Licenses
  7. 7
    Yu, M. H. ; Zhang, Z. D. ; Xiao, Q. F. ; Geng, D. Y. ; Liu, W. ; Zhao, X. G.

    [S.l.] : American Institute of Physics (AIP)
    Published 2000
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The structural transformations from amorphous, metastable-to-equilibrium phases during annealing treatment of rapidly quenched Nd10Fe90−xTix (x=0, 2, 4, 6, 8, and 10) alloys have been studied systematically. By means of ac initial susceptibility and x-ray diffraction, a CaCu5-type metastable phase was observed for 0≤x≤10 as the crystallization of the amorphous alloys occurs below 700 °C. The CaCu5-type structure transforms into a TbCu7-type one with increasing the annealing temperature (above 700 °C). These melt-spun alloys have different structures including Th2Zn17 type for 0≤x≤4 and TbCu7 and ThMn12 types for 6≤x≤10, when annealed at high temperature (above 1000 °C). Nitrogenation was carried out at 400 °C for 10 h. Both Nd(Fe,Ti)5 and its nitride are soft-magnetic phases, like Nd(Fe,Ti)7 and Nd2(Fe,Ti)17. © 2000 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1290736

    Articles: DFG German National Licenses
  8. 8
    Cui, B. Z. ; Sun, X. K. ; Liu, W. ; Zhang, Z. D. ; Geng, D. Y. ; Zhao, X. G.

    [S.l.] : American Institute of Physics (AIP)
    Published 2000
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The effects of a partial substitution of Ga for Fe on the structure and magnetic properties of mechanically alloyed Nd8.4Fe87.1B4.5 were studied. With increasing Ga content, the magnetic properties of the nanocomposite magnets first improve, reach maxima at 1.1 at. % Ga, and then degrade. The addition of Ga helps to control the morphology, especially the grain sizes of both α-Fe and Nd2Fe14B. © 2000 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.373339

    Articles: DFG German National Licenses
  9. 9
    Zhang, D. ; Zhang, Z. D.

    [S.l.] : American Institute of Physics (AIP)
    Published 1997
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The magnetic properties of Pr2Co17−xAlx compounds with 0≤x≤4 were studied by means of magnetic measurements. From these measurements it is derived that there is an almost linear decrease of the Curie temperature with Al concentration accompanied by a somewhat less strong decrease of the saturation moment at 5 K. For the compounds with 2≤x≤4, we have observed spin-reorientation transitions at temperatures that decrease strongly with increasing Al concentration. These spin-reorientations are interpreted as originating from a competition between the Pr- and Co-sublattice anisotropies. © 1997 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.365140

    Articles: DFG German National Licenses
  10. 10
    Jin, Zhi-qiang ; Sun, X. K. ; Liu, W. ; Zhao, X. G. ; Xiao, Q. F. ; Sui, Y. C. ; Zhang, Z. D. ; Wang, Zhigang

    [S.l.] : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The Nd–Fe–Ti intermetallic compounds with a ThMn12 structure have been successfully prepared by mechanical alloying and then annealed. It has been found that the phase of the hexagonal TbCu7 structure is formed in Nd8Fe84Ti8 mechanical alloy powders annealed at temperatures ranging from 650 to 850 °C. With an increase in the annealing temperature Ta, the metastable TbCu7 structure transforms into a ThMn12 structure at Ta=900 °C. Consequently, the Curie temperature increases from 180 °C of TbCu7 structure at Ta=650 to 300 °C of ThMn12 structure at Ta=1050 °C. In the series of NdxFe92−xTi8 annealed at 960 °C for 30 min, it has been observed that the ThMn12 structure exists only over the range of compositions of 5≤x〈11, and the structure of the type Th2Zn17 is formed for x≥11. All the compounds are nitrited at 400 °C for 15 h, and the Curie temperatures are raised from 400 to 450 °C. The Nd9Fe83Ti8 powder, annealed at 960 °C for 30 min, and nitrided at 400 °C for 15 h, has a coercivity iHc=2.3 kOe. The low coercivity perhaps mainly results from an excessive growth of α-Fe grains due to the high annealing temperature necessary for forming the hard magnetic phase Nd(Fe,Ti)12Nδ. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.362298

    Articles: DFG German National Licenses
  11. 11
    Zhao, T. ; Kou, X. C. ; Zhang, Z. D. ; Sun, X. K. ; Chuang, Y. C. ; de Boer, F. R.

    [S.l.] : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    High-field magnetization measurements have been performed on both free-powder samples and magnetically aligned samples of R(Fe,Mn)11Ti (R=Y, Nd, Sm, Gd, Er) compounds at 4.2 K in a step field up to 28 T. The temperature dependence of ac susceptibilities of R(Fe,Mn)11Ti has been measured in a temperature range from 4.2 to 800 K. It has been found that both the magnetic moment of the transition-metal sublattice and the Curie temperature of RFe11−xMnxTi compounds decrease with increasing x. Spin reorientations occur in ErFe11−xMnxTi compounds as the result of competition between the uniaxial anisotropy of the transition-metal sublattice and the planar or conical anisotropy of the Er sublattice. The intersublattice exchange constants nRT of ErFe11−xMnxTi compounds have been deduced by the high-field free-powder method. The effect of the substitution of Fe by Mn on the magnetic anisotropies of R(Fe,Mn)11Ti with R=Y, Nd, Sm has been investigated. First-order magnetization processes take place in SmFe11−xMnxTi compounds when the external field is applied perpendicular to the alignment direction. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.361987

    Articles: DFG German National Licenses
  12. 12
    Xiao, Q. F. ; Zhang, Z. D. ; Zhao, T. ; Liu, W. ; Sui, Y. C. ; Zhao, X. G. ; Geng, D. Y.

    [S.l.] : American Institute of Physics (AIP)
    Published 1997
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Sm10Fe90−xTix alloys (x=0, 1, 3, 4, 5, 6, 8, 10) were prepared by rapid quenching and sequent annealing. Structural transformations from amorphous, metastable-to-equilibrium phases, and magnetic properties of their nitrides were systematically investigated. A CaCu5-type metastable phase was formed for 0≤x≤10 as the crystallization of the amorphous alloys occurred below 700 °C. The CaCu5-type structure is transformed into a TbCu7-type one with increased annealing temperature (above 700 °C). These alloys have different structures including Th2Zn17 type for 0≤x≤3, TbCu7 type for 3〈x〈6, and ThMn12 type for 6≤x≤10, at high annealing temperatures (above 950 °C). Nitrogenation was carried out at 460 °C for 6 h. The best hard magnetic properties are obtained after nitriding for x=3. It gives iHc=17.6 kOe, 4πMr=7.7 kG, and (BH)max=6.8 MGOe for the TbCu7-type phase and iHc=8.6 kOe, 4πMr=8.4 kG, and (BH)max=10.2 MGOe for the CaCu5-type one. Although the coercivity of the CaCu5-type phase is lower than that of the TbCu7-type one, enhanced remanence of the former has been observed. © 1997 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.366501

    Articles: DFG German National Licenses
  13. 13
    Liu, W. ; Zhang, Z. D.

    [S.l.] : American Institute of Physics (AIP)
    Published 2000
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The structure and magnetic properties of Nd2Fe14BNδ-based alloys prepared by mechanical alloying have been investigated. For the Nd14Fe78B8Ny series, a large amount of NdN, α-Fe, and a small Nd2Fe14B phase are observed in x-ray diffraction patterns. With increasing Nd content, the amount of the Nd2Fe14BNδ phase increases and α-Fe decreases gradually. When x≥25 in the NdxFe92−xB8Ny systems, some amount of the N-containing, Nd-rich phase appears. Meanwhile, the content of the nitrogen in the Nd2Fe14BNδ phase decreases and, correspondingly, the Curie temperature decreases. The coercivity and the maximum magnetic energy product of this series attain maxima at x=25. A coercivity as high as 20 kOe has been achieved. The effect of nitrogen on the formation, composition, and magnetic properties of the Nd2Fe14BNδ compound is discussed. © 2000 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.373338

    Articles: DFG German National Licenses
  14. 14
    Zhao, T. ; Xiao, Q. F. ; Zhang, Z. D.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1999
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Nanocomposite ribbons consisting of hard-magnetic R2Fe14B (R=rare-earth) and soft-magnetic Fe3B phases were produced by melt spinning and subsequent heat treatment. Alloys of composition Nd4−xSmxFe77.5B18.5, with x=0.0, 0.1, 0.2, 0.3, 0.4, and 0.5 all showing strong remanence enhancement, were selected to investigate the effect of the magnetocrystalline anisotropy of the R2Fe14B-type phase on the exchange coupling with the soft-magnetic phase in the nanocomposite magnets. An enhancement of exchange coupling due to anisotropy reduction was found, as expected on the basis of the model of Kneller and Hawig. A maximum of the energy product (BH)max was achieved for x=0.2 after annealing at 700 °C. The thermomagnetic behavior also changes upon substitution of Sm for Nd. © 1999 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.124996

    Articles: DFG German National Licenses
  15. 15
    He, J. ; Zhang, Z. D.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 2002
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We report a transition of the giant magnetoresistance (GMR) behavior in nanocrystalline Co20(Cu1−xGex)80 ribbons from negative to positive, as the semiconductor Ge substitutes for the Cu matrix. The growth of the hexagonal Co3Ge2 compound leads to a change of the physical origin of the GMR. The normal spin-dependent transport behavior in the CoCu granular system evolves into Coulomb blockade behavior of electronic tunneling in ribbons with a Co/Co3Ge2/Co junctionlike configuration. © 2002 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1458682

    Articles: DFG German National Licenses
  16. 16
    Ma, Z. H. ; Zhang, Z. D. ; Wang, Y. X. ; Yang, X. B.

    Oxford, UK : Blackwell Science Ltd
    Published 2004
    Staff View
    ISSN:
    1365-3059
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1365-3059.2004.01036.x

    Articles: DFG German National Licenses
  17. 17
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] A standard exercise in elementary quantum mechanics is to describe the properties of an electron confined in a potential well. The solutions of Schrödinger's equation are electron standing waves—or ‘quantum-well’ states—characterized by the quantum number n, the ...
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/18178

    Articles: DFG German National Licenses
  18. 18
    Busato, S. ; Tinembart, O. ; Zhang, Z.-d. ; Scheffold, R.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0040-4020
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/S0040-4020(01)85455-7

    Articles: DFG German National Licenses
  19. 19
    Staff View
    ISSN:
    0304-8853
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0304-8853(93)90519-8

    Articles: DFG German National Licenses
  20. 20
    Fife, W.K. ; Zhang, Z.-d.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0040-4039
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)85101-1

    Articles: DFG German National Licenses