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  • 1985-1989  (6)
  • 1989  (6)
Materialart
Erscheinungszeitraum
  • 1985-1989  (6)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 498-500 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Bi(-Pb)-Sr-Ca-Cu-O thin films were prepared on MgO(100) single-crystal substrates by electron cyclotron resonance (ECR) plasma sputtering at substrate temperatures from room temperature to 590 °C. Pb-doped superconducting as-grown films were obtained above 560 °C. The Tc values of the Pb-doped films prepared at 570–590 °C were 58–64 K which increased with increasing substrate temperature. Pb-undoped as-grown films obtained at 590 °C showed superconduction (Tc =30 K), but the films obtained below 580 °C were semiconductors. The grain sizes and contents of the 37 A(ring) phase (110 K phase) were increased by the Pb doping into the as-grown Bi-Sr-Ca-Cu-O films.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A new method for pattern reduction in the x-ray region is proposed. In its principle was used the asymmetric Bragg reflection giving the different beamwidth in the reflected beam from the incident one. Light from an undulator line (BL-2) at the Photon Factory was used to obtain highly spatially resolved replication in reasonably short exposure time. Performed was one-dimensional demagnification of a pattern with a ratio of 1/4 in the following condition: Si 111 reflection was used where the offset angle α from the surface is 22° and the wavelength λ was 3.5 λ, which is available from the 7th harmonic of the undulator radiation. The submicron scale resist pattern was resolved.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 444-449 
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A contactless method is developed for high-sensitivity magnetoresistance measurement in pulsed high fields. The resistivity is measured by observing transmission of a radio-frequency field through a thin specimen. The transmission rate is analytically given as a function of the resistivity within the classical skin-effect regime. By use of a high-frequency (0.1–100 MHz), electrical noise coming from pulsed magnetic fields can be rejected effectively and the sensitivity of the measurement is improved by at least a factor of 100 compared with that of a conventional dc four-terminal method. The present method is available for the measurements on superconductors, magnetic metals, and any other materials with short collision time in high magnetic fields. Upper critical fields and magnetoresistance of recent high Tc superconductors Y-Ba-Cu-O are measured up to 40 T.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Indo-Iranian journal 32 (1989), S. 281-284 
    ISSN: 1572-8536
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Allgemeine und vergleichende Sprach- und Literaturwissenschaft. Indogermanistik. Außereuropäische Sprachen und Literaturen , Theologie und Religionswissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Experiments in fluids 7 (1989), S. 513-520 
    ISSN: 1432-1114
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Filmwise non-equilibrium condensation of methanol vapour is investigated on a shock-tube endwall behind a reflected shock wave. The theoretical prediction of a transition phenomenon during the growth of a liquid film is experimentally demonstrated: the film grows approximately in proportion to the time at the early stages after the reflection of the shock wave and, after a transition period, it grows in proportion to the square root of the time. The condensation parameter of the vapour is obtained from the conformity between experiment and theory. It is found that the condensation parameter of the methanol vapour is of the magnitude of one tenth of the value for the complete capture of the molecules on the liquid surface.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 12 (1989), S. 415-416 
    ISSN: 1434-6079
    Schlagwort(e): 76.60.-k
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Anomalously long nuclear spin-lattice relaxation time is expected in small metallic particles when the life time width of the conduction electron energy levels is smaller than their mean spacing. A new method for setting nuclear magnetization to zero is developed in order to measure the relaxation time in Cu small particles. The anomaly is observed in the relaxation of63Cu in the particles with the diameters smaller than 100 A at temperatures below 0.5 K.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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