摘要: A method of studying magnetic properties in alternating fields and its application to the intermediate state a superconducting sphere are described. It is shown that behaviour frequencies between 10 100 different from very slowly varying fields, difference becoming less for lower smaller radius. When specimen state, energy losses produced it by field, showing induced currents out phase with field. The do not, however, flow same way as homogeneous isotropic conductor, this probably on account an anisotropic structure when state. This depends strongly amplitude field such effective average conductivity increased decreasing amplitude, effect size specimen. Evidence given time lag magnetocaloric effect, decreases decrease specimen, being order sec. about 1 cm. diameter. In conclusion I wish thank Prof. Lord Rutherford Dr Cockcroft their interest work; Peierls suggesting experiment much valuable advice assistance; Mr Shire some technical points; various members staff Royal Society Mond Laboratory help measurements.
sci-hub.se 参考文章(8)
L. SHUBNIKOV, I. NAKHUTIN, Electrical Conductivity of a Supraconducting Sphere in the Intermediate State Nature. ,vol. 139, pp. 589- 590 ,(1937) , 10.1038/139589B0
K. Mendelssohn, R.B. Pontius, Note on magnetic hysteresisand time effects in supraconductors Physica D: Nonlinear Phenomena. ,vol. 3, pp. 327- 331 ,(1936) , 10.1016/S0031-8914(36)80307-3
Magnetic Transition Curves of Supraconductors Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 155, pp. 613- 628 ,(1936) , 10.1098/RSPA.1936.0123
W.J De Haas, J.M Casimir-Jonker, Untersuchungen Über den Verlauf des Eindringens Eines Transversalen Magnetfeldes in Einen Supraleiter Physica D: Nonlinear Phenomena. ,vol. 1, pp. 291- 296 ,(1934) , 10.1016/S0031-8914(34)90035-5
The Magnetization Curves of a Supraconducting Sphere and Ring Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 155, pp. 712- 726 ,(1936) , 10.1098/RSPA.1936.0129
W.J de Haas, J Voogd, J.M Jonker, Quantitative Untersuchung Über Einen Möglichen Einfluss der Achsenorientierung auf die Magnetische Übergangsfigur Physica D: Nonlinear Phenomena. ,vol. 1, pp. 281- 290 ,(1934) , 10.1016/S0031-8914(34)90034-3
W.H. Keesom, A.P. Keesom, On the heat conductivity of liquid helium Physica D: Nonlinear Phenomena. ,vol. 3, pp. 359- 360 ,(1936) , 10.1016/S0031-8914(36)80312-7
D. Shoenberg, An A.C. Method of Measuring Resistance Mathematical Proceedings of the Cambridge Philosophical Society. ,vol. 33, pp. 577- 582 ,(1937) , 10.1017/S0305004100077707