Open AccessFurther experiments on superconductivity with alternating currents of high frequency
Publication year - 1932
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1932.0182
Subject(s) - superconductivity , condensed matter physics , tin , alternating current , physics , alternation (linguistics) , materials science , voltage , metallurgy , quantum mechanics , linguistics , philosophy
In some previous papers experiments have been described in which the phenomena of superconductivity were investigated by the use of alternating currents having frequencies up to 16 million per second. It was found that with these currents there was a critical temperature at which the high frequency resistance abruptly decreased and that this point was a little lower than the critical temperature at which superconductivity appeared when direct currents were used. This depression of the superconducting point was shown to be a function of the frequency of alternation of the currents used, becoming greater the higher the frequency. The effect was investigated with the metals tin, lead, and tantalum, by using several frequencies. In this paper further experiments upon the frequency disturbance of superconductivity are described.