Enhanced flux pinning in a high-Tc superconducting film by a ferromagnetic buffer layer

Xixiang Zhang*, G. H. Wen, R. K. Zheng, G. C. Xiong, G. J. Lian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A YBa2Cu3O7 (30 nm) superconductor layer and a YBa2Cu3O7 (30 nm)/ Pr0.67Sr0.33MnO3 (30 nm) superconducting/ferromagnetic bilayer were epitaxially grown on the single-crystal (100) SrTiO3 substrates. Magnetic characterizations on both samples were very carefully performed over wide temperature and field ranges. The enhanced flux pinning by the ferromagnetic layer in the bilayer sample is clearly seen in the comparison of the temperature-dependent magnetization data obtained in the zero-field-cooled and field-cooled processes for both samples. The fact that the temperature-dependent remanent magnetization in the bilayer shows a sharper transition near the TC than that in the YBCO single layer is also consistent with the picture of the enhanced flux pinning. The above observations are confirmed by the enhanced critical current density, Jc ∞ ΔM, where ΔM is the magnetic irreversibility in the hysteresis loops.

Original languageEnglish (US)
Pages (from-to)119-125
Number of pages7
JournalEurophysics Letters
Volume56
Issue number1
DOIs
StatePublished - Oct 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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