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  • 1
    Electronic Resource
    Electronic Resource
    Study on the preparation of 90-K superconductor LaBa2Cu3Oy (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4095-4102 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The high-Tc superconductor LaBa2Cu3Oy has been prepared under various conditions, and characterized by x-ray and neutron powder diffraction techniques, dc and ac magnetic susceptibility measurements, and dc resistivity measurement. It has been found that samples with excellent superconducting characteristics and also with good structural properties are obtained in a reproducible way if the following three procedures are performed: preheat treatment of La2O3 powders, sintering in N2, and low-temperature annealing in dried O2. Long-time annealing in undried O2 was sometimes found to degrade the grain boundaries and to lead to a lower zero-resistance temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341318
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  • 2
    Electronic Resource
    Electronic Resource
    Perturbation theory for polyacetylene-type kink dynamics model with acoustic phonon effects (1985)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 26 (1985), S. 2940-2955 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Using a quasirealistic generalized continuum Takayama–Liu–Maki (TLM) model including acoustic phonon effects, perturbation theory is applied and a formal method for computing the kink of the TLM model with its perturbative corrections due to acoustic phonon interaction effects is presented. It is found that acoustic effects induce the motion of the soliton. The kink is then constrained to propagate along the molecular chain with a fixed velocity of magnitude close to that of the acoustic phonon velocity. No static solution is consistent with perturbation theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.526721
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  • 3
    Electronic Resource
    Electronic Resource
    Feynman rules in the Anderson model: Generalization to the (2J+1)-component case (1986)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 27 (1986), S. 1711-1715 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The Feynman rules for the Anderson model with a (2J+1)-component localized spin are formulated by means of a generalized Wick's expansion together with the reduction formulas in the thermo-field-dynamics. In the U→∞ limit, Feynman rules for arbitrary J correspond closely to those for the case J= 1/2 and may be obtained from them by a simple replacement rule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.527087
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  • 4
    Electronic Resource
    Electronic Resource
    Comments on the perturbed sine–Gordon equation (1985)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 26 (1985), S. 2205-2207 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: We examine the sine–Gordon equation with a perturbation λΔV. We derive necessary conditions on ΔV such that the perturbed equation has solutions with finite energy, analytic in λ, and which reduce to the static soliton when the perturbation is removed (λ→0). Several examples illustrating these conditions are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.526848
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  • 5
    Electronic Resource
    Electronic Resource
    Anomalous surface impedance in reentrant ferromagnetic superconductors (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3104-3106 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report evidence which suggests surface ferromagnetism in a ferromagnetic superconductor arising from the competition between the Meissner current shielding effect and the fluctuations of the localized magnetic moments. We have measured the surface impedance penetration depth Λ of ErRh4B4 and Er0.5Ho0.5Rh4B4 by employing a spectrometer operated at 9 GHz. For ErRh4B4, owing to the critical spin fluctuations just above Ts (〉Tc2), the critical temperature at which surface ferromagnetism appears, Λ−1 decreases smoothly as temperature decreases toward Ts. For Er0.5Ho0.5Rh4B4, the decrease of Λ−1 arising from spin fluctuations for T〉Tc2 is very small, and Λ−1 decreases abruptly at Tc2. We will discuss the theory and show how the predicted values of Λ(T) compare well with the observed values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335172
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  • 6
    Electronic Resource
    Electronic Resource
    The theory of ferromagnetic superconductors (invited) (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3093-3098 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Since their discovery in 1977 the rare earth ternary superconductors have provided a number of unusual phenomena regarding the interplay of magnetism and superconductivity. In the case of the reentrant superconductors ErRh4B4 and HoMo6S8 the importance of the electromagnetic interaction, in determining the physical properties of these materials, was realized shortly after their discovery. More recent single crystal data indicate that in addition to the electromagnetic interaction the d–f interaction, although weak, gives rise to a number of dramatic properties notably the appearance of a first order transition at the upper critical field Hc2. In this paper we outline a formalism which successfully incorporates both the electromagnetic interaction together with the d–f interaction in a mutually consistent manner. The results of our analysis based on this formalism are presented for the case of ErRh4B4 together with a comparison with the recent monocrystalline data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335170
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  • 7
    Electronic Resource
    Electronic Resource
    The patient with combined deficiency of neuraminidase and 21-hydroxylase (1987)
    Springer
    Human genetics 〈Berlin〉 75 (1987), S. 91-92 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary To investigate the possibility that delection en bloc in the HLA region had caused the combined deficiency of neuraminidase and 21-hydroxylase in a female patient, genetic markers on the short arm of chromosome 6 were examined in the patient and her parents, and 21-hydroxylase genes of the patient were analyzed by the Southern blot technique. The affected “extended haplotype” identical by descent might have been recombined at two sites, between HLA-A and C and between HLA-DQ and GLO. This suggests that the neuraminidase gene is mapped between HLA-A and GLO. Southern blot analysis revealed the existence of two 21-hydroxylase genes, so that we found no evidence to support the possibility that deletion en bloc in the HLA class III region had caused the combined deficiency of neuraminidase and 21-hydroxylase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273850
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  • 8
    Electronic Resource
    Electronic Resource
    Vacuum in thermo field dynamics (1987)
    Springer
    The European physical journal 34 (1987), S. 335-339 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The framework for thermo field dynamics is presented in the axiomatic form. It consists of the conditions for the quantum algebra and the conditions for the vacuum. Choices of nonequilibrium vacuums correspond to nonequilibrium phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01548815
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  • 9
    Electronic Resource
    Electronic Resource
    The refractivity of CO2 gas in the region of 10 μm (1987)
    Springer
    Applied physics 44 (1987), S. 147-149 
    Details
    ISSN: 1432-0649
    Keywords: 06.20-f ; 42.68-w ; 78.20-e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The refractivity of the CO2 gas is measured with an experimental error of 2% in the 10-μm region, using 10.4-μm band CO2 laser line. The frequency of the CO2 laser is swept through the Doppler profile of the laser line. The experiment is achieved using a 0.63-μm He−Ne/10.6-μm CO2-laser interferometer with a 2-m long vacuum cell. From the result, it is found that the Koch's formula also holds for the wavelengths in the 10-μm region within an accuracy of 2%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692315
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  • 10
    Electronic Resource
    Electronic Resource
    The general structure of two point functions in thermo field dynamics (1986)
    Springer
    The European physical journal 33 (1986), S. 201-204 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The structure of two point functions in thermo field dynamics, in which the vacuum is chosen to be a nonequilibrium state, is investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411137
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