Rolling-induced texturing in metal-clad MgB2 tapes and magnetoresistivity anisotropy

V. Beilin*, I. Lapides, M. Roth, E. Dul'kin, E. Mojaev, A. Gerber, O. Riss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Metal-clad MgB2 tapes with Cu, Ni, Fe, and stainless steel sheaths, fabricated by the powder-in-tube method, have been studied using x-ray diffraction and magnetoresistance measurements. Tapes subjected to different mechanical and thermal processings have been used to probe the ab-plane texturing. Only moderate rolling-induced texturing has been observed experimentally, with a maximal texture factor, ΔF001, of about 0.22. ΔF001 is found to be dependent on both the sheath material and tape processing prehistory. Electrical resistivity measurements in high magnetic fields (parallel and perpendicular to the tape plane) show that even poor texturing, with ΔF001=0.065, may result in a significant anisotropy of magnetoresistance. The anisotropy of the upper critical field, Bc2, has been derived from the experimental texturing and magnetoresistance data, with the anisotropy factor of the order 5 at 4.2 K. It is shown that a maximal magnetic field shift of the resistively probed superconducting transition associated with the tape core texturing may reach 4.5 T at 4.2 K.

Original languageAmerican English
Article number043903
JournalJournal of Applied Physics
Volume100
Issue number4
DOIs
StatePublished - 2006

Bibliographical note

Funding Information:
This study was supported by the grant of the Ministry of the National Infrastructures of Israel. The authors would like to thank Dr. E. Yashchin for assistance with sample preparation.

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