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  • 1
    Electronic Resource
    Electronic Resource
    Kontinuierliche Erzeugung von Temperaturen unter 1 °K (1968)
    Springer
    Naturwissenschaften 55 (1968), S. 482-487 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Zusammenfassung Das vonLondon vorgeschlagene Kühlprinzip der “Verdampfungskühlung eines osmotischen Gases” ist experimentell bestätigt worden. Durch die kontinuierliche Erzeugung der sehr tiefen Temperaturen und die bei diesen Temperaturen erreichten Kälteleistungen ist dieses Prinzip allen anderen bisher bekannten Methoden weit überlegen. Die kontinuierliche Erzeugung der tiefen Temperaturen ermöglicht es, größere Substanzmengen eines anderen Stoffes abzukühlen und Temperaturgleichgewichte abzuwarten. Für die einmalige Erzeugung der tiefsten Temperaturen ist jedoch die Methode der adiabatischen Entmagnetisierung eines Spinsystems unübertroffen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00599707
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Elektrische Leitfähigkeit von Ag2F und ihre Temperaturabhängigkeit (1957)
    Springer
    Naturwissenschaften 44 (1957), S. 463-464 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00640881
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Book reviews (1976)
    Springer
    Applied physics 11 (1976), S. 310-312 
    Details
    ISSN: 1432-0630
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897073
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Zum magnetischen Nachweis der Supraleitung aufgedampfter Metallschichten (1962)
    Springer
    The European physical journal 167 (1962), S. 501-510 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract There is described an apparatus for the statement of superconductivity and ferromagnetism of a single evaporated film in the temperature range from 1.8° to 300° K. The observation of the magnetic moment of the film in a homogeneous alternating magnetic field is made possible by means of a special device of two sense coils. Tests with Pb and Sn foils result in the known transition temperatures of bulk material. A Sn film in a highly disordered state is produced by quenching condensation. The magnetic transition of such a film is found to be 0.8° K higher than the transition temperature of the annealed film. The result agrees with the resistance measurements by W.Buckel and R.Hilsch. The magnetic measurement proves the increased transition temperature for the whole material of the film.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378177
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Schichtdickenbestimmung und elektrische Leitfähigkeit metallischer Aufdampfschichten (1964)
    Springer
    The European physical journal 181 (1964), S. 368-390 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An apparatus is described, which enables us to measure the thicknesses of films immediately after condensation at low temperatures and in different stages of annealing by means of a multiple beam interferometry technique (Tolansky). The film thicknesses are also measured by the temperature dependence of the electrical resistance. Measurements of Pb- and Cu-films are given as an example, and the sources of errors are discussed. In the case of Pb-films both the methods give the same thicknesses at any condensation temperature. This leads to the conclusion that Pb-films have a density of the compact material. At low condensation temperatures the disorder in the films turns out to be thickness dependent, and the distribution of defects seems to be inhomogeneous. Cu-films condense at low temperatures with high porosity. This may be the cause of the often observed getter effect of freshly condensed Cu-films. The filling factor of Cu-films is studied at different condensation temperatures. The temperature dependence of the resistivity of thin metallic films is discussed in the appendix of this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01380869
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Tunnelexperimente an amorphen Supraleitern (1968)
    Springer
    The European physical journal 213 (1968), S. 397-410 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Superconducting disordered and amorphous films of Bi, Ga, Al are studied by the tunneling technique. The values of the reduced energy gap 2δ/kT c (4.56 in amorphous Bi, 4.52 in amorphous Ga, 4.15 in amorphous Sn, and 3.72 in amorphous Al) indicate a very strong coupling in some amorphous superconductors. An increase of the tunneling resistance by crystallization of the amorphous Ga-films is interpreted as a decrease in the concentration of free electrons. The influence of the high film resistance on the measured slope of the tunneling curves is observed as long as both films or one of them are normal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01385485
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    Paper (German National Licenses)
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