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Journal of Superconductivity and Novel Magnetism

, Volume 26, Issue 4, pp 1119–1122 | Cite as

Angular Dependence of the Fluctuation Magnetization Vector Above the Superconducting Transition of a Highly Anisotropic High-T c Cuprate

  • R. I. Rey
  • J. Mosqueira
  • N. Cotón
  • J. D. Dancausa
  • J. M. Doval
  • A. Ramos-Álvarez
  • A. Wahl
  • M. Tello
  • F. Vidal
Original Paper
  • 52 Downloads

Abstract

In highly anisotropic cuprate superconductors it is generally accepted that the reversible magnetization vector, \(\vec{M}\), is essentially perpendicular to the superconducting CuO2 layers in a wide range of crystal orientations with respect to the applied magnetic field, \(\vec{H}\). In a recent work (Mosqueira et al. in Phys. Rev. B 84:134504, 2011) it is shown, however, that the dependence of \(\vec{M}\) on the \(\vec{H}\) orientation in the reversible mixed state of a high-quality Tl-based cuprate presents a notable deviation from this behavior. Here we extend these measurements to the fluctuation region above T c , in order to check whether the above-mentioned effect is also present.

Keywords

High-Tc superconductors Magnetic properties Anisotropy Fluctuations 

Notes

Acknowledgements

This work was supported by the Spanish MICINN and ERDF (FIS2010-19807) and the Xunta de Galicia (2010/XA043 and 10TMT206012PR), and the european project ENERMAT. We acknowledge J. Ponte for his valuable help with the rotating sample holder.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • R. I. Rey
    • 1
  • J. Mosqueira
    • 1
  • N. Cotón
    • 1
  • J. D. Dancausa
    • 1
  • J. M. Doval
    • 1
  • A. Ramos-Álvarez
    • 1
  • A. Wahl
    • 2
  • M. Tello
    • 3
  • F. Vidal
    • 1
  1. 1.LBTSUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Laboratoire CRISMAT, ENSICAENUMR 6508 CNRSCaenFrance
  3. 3.Departamento de Física de la Materia CondensadaUPVBilbaoSpain

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