Fishtail effect and the superconducting phase diagram of La1.6-xNd0.4SrxCuO4 single crystal

I. M. Sutjahja, M. Diantoro, D. Darminto, A. A. Nugroho, M. O. Tjia*, A. A. Menovsky, J. J.M. Franse

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Measurements of isothermal magnetic hysteresis loop in c-aligned external field have been performed on superconducting La1.6-xNd0.4SrxCuO4 (x = 0.10, 0.20) single crystals, resulting in the H-T phase diagrams for the respective samples. The isothermal magnetization data of Sr-0.10 reveal the existence of fishtail effect in the certain temperature range of measurement (2.5 ≤ T ≤ 5.5 K), terminated at temperature well below the superconducting critical transition temperature (Tcon ≈ 8 K). Analysis of the irreversibility line shows a sign reversal of its slope at around the crossover field, H2D, indicating 2D melting at higher field. On the other hand, a single Hirr(T) function of 3D character was found to fit the irreversibility data for the Sr-0.20 sample, indicating the lack of vortex line decoupling effect in the same range. These remarkably different behaviors are suggested to have their origin in the different degrees of anisotropy (γ ≈ 96 for Sr-0.10 vs. γ ≈ 25 for Sr-0.20) as a consequence of different levels of Sr doping.

Original languageEnglish
Pages (from-to)541-545
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 1
Publication statusPublished - 1 Oct 2002


  • Fishtail effect
  • LaNdSrCuO single crystal
  • Magnetization
  • Phase diagram


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