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  • 1
    Electronic Resource
    Electronic Resource
    T〉0 thermal properties of the generalized three-state potts model
    Amsterdam : Elsevier
    Physics Letters A 117 (1986), S. 36-42 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(86)90232-X
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  • 2
    Electronic Resource
    Electronic Resource
    Ground-state energy of spin-1/2 and spin-1 antiferromagnetic chains: XY model (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5932-5934 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The ground-state energy of the XY antiferromagnetic chains with spin-1/2 and spin-1 are obtained by a real space renormalization group method. For S=1/2 a large spin cluster is used in the mapping to improve the accuracy and a boundary theory is applied to extrapolate to the result which is in excellent agreement with the exact Bethe Ansatz result. For S=1 the ground-state energy of the model is obtained by using the renormalization group method and a finite chain calculation for lattices up to 16 sites. The two results are in very good agreement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342179
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  • 3
    Electronic Resource
    Electronic Resource
    Giant magnetoresistance induced by spin-correlation scattering in magnetic thin films and other compounds : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5162-5164 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present the study of the giant magnetoresistance effect in ferromagnetically ordered thin film and bulk based on the Hund's rule coupling between the mobile d electron and the core spin of Mn ions. It has been shown that the resistivity is proportional to the spin–spin correlation functions, a maximum resistivity appears near the critical point in absence of magnetic field and an applied field drives the resistivity peak to higher temperature and reduces the peak value, which is in agreement with the experiments. The giant magnetoresistance effect in thin film is attributed to the spin-correlation-dependent scattering and the low-dimensional character. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361541
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  • 4
    Electronic Resource
    Electronic Resource
    Electronic structure and magnetic properties of R2Fe17Nx (x=0,3,4) and R2Fe17Cx (x=0,3), (R=Sm,Nd) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6916-6918 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electronic structure and magnetic properties of rare-earth iron compounds R2Fe17Nx (x=0,3,4) and R2Fe17Cx (x=0,3) (R=Sm,Nd) have been studied by the self-consistent, spin-polarized local spin density functional theory calculations. Several cluster models were used to study the electronic structure of these compounds. For the R2Fe17Nx and R2Fe17Cx (x=0,3), the 9(e) sites in a unit cell are considered as occupied by N or C atoms. The additional N atom in the x=4 case is considered as occupying the 3(b) sites. The distribution of electrons and the magnetic moments for four kinds of crystalline inequivalent Fe atoms, Sm (Nd) and N(C) are calculated. The role of N or C atom in above compounds were discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352433
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  • 5
    Electronic Resource
    Electronic Resource
    The electromagnetic behaviors of a large object under high power microwave environment (abstract) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6803-6803 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In order to investigate the behavior of aerospace asserts exposed to high power microwaves (HPM) or electromagnetic pulse (EMP) modeling the time-dependent electromagnetic (EM) behavior of the flying body before or after actual experiments has received significant attentions. The present available finite-difference time-domain method have fundamental difficulties in meeting the needs when the object has either complex geometry (including complex composite materials) or large physical size. We have proposed a method which can overcome the above-mentioned difficulties in EM modeling. The method is based upon a card-shuffle parallel algorithm used on a massive parallel computer. The initial test has been carried out on several types of computers. It enhances the modeling ability significantly. To model a large size flying body under HPM environment is no longer an impossible thing. The method can also provide effective approach to deal with many other important applications whenever it involves solving a wavelike equation and demanding giant computer storage. Examples are antenna design, aerodynamics, upset and damage model of semiconductor devices, turbulence, neural network, etc. Further improving the method is ongoing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352491
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  • 6
    Electronic Resource
    Electronic Resource
    A full electron LMTO-ASA study of electronic band structure and magnetic properties for RFe11TiNx (R=Y, Nd, Sm; x=0,1) : The 6th joint magnetism and magnetic materials (MMM)−intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6751-6753 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The band structure and magnetic properties are studied for RFe11TiNx (R=Y, Nd, Sm; x=0,1) rare-earth iron intermetallic compounds using the linear muffin tin orbital with the atomic sphere approximation (LMTO-ASA) method. In order to elucidate the role played by the rare-earth atoms in these compounds, a full electron calculation is performed using a semirelativistic spin-polarized LMTO-ASA method in the local spin density approximation (LSDA) regime. The 4f electrons of the rare-earth atoms are considered to be valence electrons in the self-consistent calculations. For NdFe11TiN, a calculation in which the 4f electrons are treated as core-frozen states is also performed, and is compared with the full electron calculation. The effects of N atoms in these compounds are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358151
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  • 7
    Electronic Resource
    Electronic Resource
    A renormalization group study of the 2D antiferromagnetic Heisenberg model : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6102-6104 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We study the problem of the existence of long-range staggered magnetic order in the antiferromagnetic Heisenberg model on the square lattice by a renormalization group analysis. We first map the Heisenberg model onto an approximate effective model, described by the Hamiltonian: H = ∑Lj=1S(j)S(j + 1) + ∑Lj=1( − 1)j||J(j)||S(0)S(j), where S(0) represents a single spin located in the center of the ring. We show that the Ji tend to non-zero values as one increases the block size by successive renormalizations, thus establishing the existence of long-range staggered magnetic order in the effective model. We discuss the implications of this result for the original Heisenberg model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352714
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  • 8
    Electronic Resource
    Electronic Resource
    Numerical studies of the quantum spin chain (abstract) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5616-5616 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the results of recent numerical studies of the antiferromagnetic Heisenberg chain with S=1/2, 1, 3/2, and 2. The ground-state energy and the energy gap between the ground state and the first excited state are obtained by using exact diagonalization method on various finite lattices and an improved real-space renormalization method. We discuss our numerical methods and results. Some of our results on the S=1 biquadratic antiferromagnetic model will also be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345902
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  • 9
    Electronic Resource
    Electronic Resource
    Study of the mechanism of the emulsifier-free emulsion polymerization of the styrene/4-vinylpyridine system (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 658-665 
    Details
    ISSN: 1435-1536
    Keywords: Key words Emulsifier-free emulsion polymerization ; Oligomeric emulsifier ; Oligomeric particles ; Oligomeric emulsifier reservoir ; Micelle nucleation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract For the emulsifier-free emulsion copolymerization of styrene with the water-soluble comonomer 4-vinylpyrindine (4VP), and using ammonium persulfate as an initiator, the kinetics, the content of 4VP, the molecular weight and the molecular weight distributions of the polymer at various conversions, and particle morphologies have been investigated. Based on the results obtained, the particle nucleation mechanism was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050437
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  • 10
    Electronic Resource
    Electronic Resource
    Preparation of styrene/acrylonitrile copolymer microspheres and their composites with metal particles (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 245-249 
    Details
    ISSN: 1435-1536
    Keywords: Key words Poly(styrene-co-acrylonitrile) microspheres ; Composite particles ; Chemical metal deposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  Monodispersed poly(styrene-co-acrylonitrile) [P(St-co-AN)] microspheres were prepared by emulsifier-free emulsion copolymerization of St with AN. Fourier transform IR spectroscopy and elemental analysis were used to measure the content of AN in the poly(St-co-AN) microspheres. X-ray photoelectron spectroscopy (XPS) measurements indicated the presence of an AN unit on the surface of the microspheres. The combined results of the elemental analysis and the XPS measurements showed that the copolymer on the surface of the P(St-co-AN) particles was rich in AN compared with that in the interior of the particles. P(St-co-AN)–metal composite particles were prepared by chemical metal deposition. The addition of nickel could improve the distribution of cobalt on surface of the polymer microspheres. The preparation of polymer–bimetal composite particles was tried. Transmission electron microscopy and XRD were used to study the distribution and structure of the deposited metal particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050038
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