caa a22 4500 445381426 CHVBK 20180317143018.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0879-5 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0879-5 Campbell A. Dept. of Engineering, University of Cambridge, Cambridge, UK aut Magnetic Fields in Superconductors and Ferromagnetic Materials [Elektronische Daten] [A. Campbell] A comparison is made between the treatment of magnetic fields in superconductors and normal materials. First some history is given, showing how early workers anticipated vortices. Later treatments tried to build a macroscopic theory using forces and torques on magnets. This was extremely unsatisfactory. Maxwell's equations for normal materials are derived using average fields. The differences between the applied field, the demagnetising field, the local field on an atom and H are made clear. The derivation in superconductors follows a different path and uses the theory of Evetts. Simple and rigorous derivations of the forces on bodies and magnetic energies are derived, with comments on less satisfactory treatments. This is extended to thermodynamic potentials including the Ginzburg-Landau free energy. Springer Science+Business Media, LLC, 2010 Electromagnetic fields nationallicence Superconductors nationallicence Ferromagnetism nationallicence Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 895-903 1557-1939 24:1-2<895 2011 24 10948 https://doi.org/10.1007/s10948-010-0879-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0879-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Campbell A. Dept. of Engineering, University of Cambridge, Cambridge, UK aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 895-903 1557-1939 24:1-2<895 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer