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Residual irreversibility in high-Tc superconductors

Author

Listed:
  • Krusin-Elbaum, L.
  • Malozemoff, A.P.
  • Cronemeyer, D.C.
  • Holtzberg, F.
  • Chandrashekhar, G.V.
  • Clem, J.R.
  • Hao, Z.

Abstract

Magnetization measurements on many single crystals of YBaCuO as well as BiSrCaCuO show a non-vanishing remanent magnetization in a region where the field-cooled and zero-field-cooled magnetizations coincide. We call this kind of remanence “residual irreversibility”. We argue that this behavior is not compatible with over-simplified critical-state models or surface barriers. We show how it can arise from weak “residual” pinning in a regime where vortices are further apart than the penetration depth and the reversible B(H) curve shows a sharp initial rise just above Hcl. The “residual irreversibility” can be enhanced in crystals with an inhomogeneous or non-superconducting core, as seen in some of our thicker YBa/CuO crystals and also in BiSrCaCuO. We also show how the field-cooled Meissner fraction can measure the superconducting volume fraction in the low-field limit.

Suggested Citation

  • Krusin-Elbaum, L. & Malozemoff, A.P. & Cronemeyer, D.C. & Holtzberg, F. & Chandrashekhar, G.V. & Clem, J.R. & Hao, Z., 1990. "Residual irreversibility in high-Tc superconductors," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(1), pages 367-377.
    • Handle: RePEc:eee:phsmap:v:168:y:1990:i:1:p:367-377
    DOI: 10.1016/0378-4371(90)90388-9
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    References listed on IDEAS

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    1. Chandrasekharan Rajendran & Dipak Chaudhuri, 1990. "Heuristic algorithms for continuous flow‐shop problem," Naval Research Logistics (NRL), John Wiley & Sons, vol. 37(5), pages 695-705, October.
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