‘Giant’ normal state magnetoresistances of Bi\(\mathsf{_{2}}\)Sr\(\mathsf{_{2}}\)CaCu\(\mathsf{_{2}}\)O \(\mathsf{_{8 + \delta}}\)

  • V. N. Zavaritsky
  • J. Vanacken
  • V. V. Moshchalkov
  • A. S. Alexandrov
Article

Abstract.

Magnetoresistance (MR) of Bi-2212 single crystals with \(T_{c} \approx 87-92\) K is studied in pulsed magnetic fields up to 50 T along the c-axis in a wide temperature range. The negative out-of-plane and the positive in-plane MRs are measured in the normal state. Both MRs have similar magnitudes, exceeding any orbital contribution by two orders in magnitude. These are explained as a result of the magnetic pair-breaking of preformed pairs. Resistive upper critical fields H c2(T) determined from the in- and out-of-plane MRs are about the same. They show non-BCS temperature dependences compatible with the Bose-Einstein condensation field of preformed charged bosons.

Keywords

Spectroscopy Magnetic Field Neural Network Normal State Complex System 

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • V. N. Zavaritsky
    • 1
    • 2
  • J. Vanacken
    • 3
  • V. V. Moshchalkov
    • 3
  • A. S. Alexandrov
    • 1
  1. 1.Department of PhysicsLoughborough UniversityLoughboroughUK
  2. 2.Kapitza Institute for Physical ProblemsMoscowRussia
  3. 3.Laboratory for Solid State Physics and Magnetism K.U. LeuvenLeuvenBelgium

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