Journal of Superconductivity

, Volume 14, Issue 4, pp 519–523

Magnetization Study of (Hg,Cr)Sr2CuO4 + δ Superconductor

Authors

  • S. Balamurugan
    • Department of ChemistryIndian Institute of Technology-Bombay
  • I. K. Gopalakrishnan
    • Novel Materials and Structural Chemistry DivisionBhabha Atomic Research Centre
  • J. V. Yakhmi
    • Novel Materials and Structural Chemistry DivisionBhabha Atomic Research Centre
  • P. Selvam
    • Department of ChemistryIndian Institute of Technology-Bombay
Article

DOI: 10.1023/A:1012243831169

Cite this article as:
Balamurugan, S., Gopalakrishnan, I.K., Yakhmi, J.V. et al. Journal of Superconductivity (2001) 14: 519. doi:10.1023/A:1012243831169

Abstract

(Hg,Cr)-Sr-1201 type superconductor of nominal composition Hg0.7Cr0.3Sr2CuO4 + δ was synthesized by the sealed quartz-tube method. X-ray diffraction analysis of the sample showed it has tetragonal symmetry with lattice parameters a = 3.841(1) Å, and c = 8.664(3) Å. The as-prepared sample is superconducting at 60 K as shown by dc-magnetization and dc-resistivity measurements. The irreversibility line (IL) obtained from the merging point of the zero-field-cooled and the field-cooled magnetization measurements at several applied fields was found to obey the equation H = A(1 − T/Tc)n and gave a value of 2.55 for the exponent “n.” Using magnetic hysteresis loops the critical current density of superconducting (Hg,Cr)-Sr-1201 was estimated. The irreversibility line and magnetic hysteresis showed reduced pinning properties of (Hg,Cr)-Sr-1201 as compared to HgBa2CuO4 + δ.

(Hg,Cr)-Sr-1201dc magnetizationirreversibility line (IL)
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Copyright information

© Plenum Publishing Corporation 2001