Surface barriers and two-dimensional-collective pinning in single crystal Nd1.85Ce0.15CuO4-δ superconductors

F. Zuo, S. Khizroev, Xiuguang Jiang, J. L. Peng, R. L. Greene

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

We report detailed magnetization studies on a single crystal Nd 1.85Ce0.15CuO4-δ superconductor in the magnetic field parallel to the c-axis direction. Two characteristic peaks are observed in the magnetization data, corresponding to surface barriers and two-dimensional (2-D) collective pinnings. The critical currents corresponding to the maximum and minimum widths in the hysteresis loops increases with decreasing temperature exponentially. We propose that the fishtail magnetization in this compound is due to the presence of a surface barrier and the pinning of collective 2-D vortices. The initial peak in magnetization is due to the presence of Bean-Livingston surface barriers and the larger peak in M at higher H corresponds to 2-D pinning.

Original languageEnglish (US)
Pages (from-to)6953-6955
Number of pages3
JournalJournal of Applied Physics
Volume76
Issue number10
DOIs
StatePublished - Dec 1 1994

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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