Introduction

  • Nikolai M. Plakida

Abstract

Ever since 1911 when H. Kamerlingh Onnes first discovered superconductivity, physicists have been interested to find out why the temperature of the transition to the superconducting state T c is so low compared to the temperatures of other phase transitions. The temperatures of the transitions to ferromagnetic or antiferromagnetic states in metals are hundreds of degrees Kelvin, while for most common superconductors T c lies around 10 K. This fact seems surprising, since in the both cases the phase transitions take place in the electron subsystem of the crystals and are ultimately due to electron-electron interaction. To answer this question, we shall discuss in this chapter the history of Bednorz and Müller discovery of the new oxide superconductors [1.1, 2]. We shall also try to explain why they can be singled out as a separate class of superconductors and what are the principle features which distinguish them from conventional superconductors.

Keywords

Nickel Anisotropy Barium Boiling Perovskite 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • Nikolai M. Plakida
    • 1
  1. 1.Laboratory of Theoretical PhysicsJoint Institute for Nuclear ResearchDubna, Moscow RegionRussia

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