Superconductivity Superconductivity Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors, when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911, in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor during its transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of
Heike Erkers of employers performing salary surveys (lönekartläggning) on a regular basis. Another issue is child poverty. She is also a member of the Executive Committee of the European Federation of Public Service Unions (EPSU) Heike Erkers Heike Erkers is the Chair of the Swedish labour union Akademikerförbundet SSR (in English 'The Union for Professionals'). She is currently off duty from her regular employment as a head of department at the Swedish Public Employment Service (in Swedish 'Arbetsförmedlingen'). Heike Erkers started being in enganged in labour union issues in the 1990s. In 2003 she was elected member of the board of Akademikerförbundet