Critical current anisotropy in non-sintered metal-clad MgB2 tapes

V. Beilin*, I. Felner, E. Yashchin, E. Dul'Kin, M. Roth, I. Lapides, A. Verdyan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Ag/MgB2, Cu/MgB2 and SS/MgB2 (stainless) tapes were fabricated by the oxide powder-in-tube method. X-rays diffraction studies showed the formation of moderate c-axis texturing in the MgB2 core, which increases with the sheath strength and correlates with the core microhardness. Magnetization hysteresis loops of the tapes were measured for applied magnetic field (H) parallel and normal to the tape plane, in a wide range of H (0-5 T) and temperature (5-25 K). The critical current density (Jcm), calculated using the extended Bean model, indicates the possible current limitation due to inter-particle links. Significant anisotropy in Jcm is observed. The "parallel" Jcm is one order of magnitude higher than the "normal" Jcm which is of the same order of magnitude as transport Jc in non-sintered tapes. This anisotropy is assumed to be originated from the weak large-scale connectivity (deformation-induced crack formation) in densified MgB2 core after the rolling process.

Original languageAmerican English
Pages (from-to)15-20
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume377
Issue number1-2
DOIs
StatePublished - 2002

Bibliographical note

Funding Information:
This research was supported by the Ministry of the National Infrastructure of Israel.

Keywords

  • Anisotropy
  • Critical currents
  • MgB
  • Tapes
  • Texture

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