High quality MgB2 thick films and large-area films fabricated by hybrid physical-chemical vapor deposition with a pocket heater

S. F. Wang, Ke Chen, C. H. Lee, A. Soukiassian, D. R. Lamborn, R. Defrain, J. M. Redwing, Qi Li, D. G. Schlom, X. X. Xi

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A hybrid physical-chemical vapor deposition process using a pocket heater was developed for the growth of high quality epitaxial large-area MgB 2 thin films and c-axis textured MgB2 thick films. This technique is able to independently control the substrate and Mg source temperatures and maintain sufficient Mg overpressure to ensure phase stability. The two-inch large-area MgB2 thin films showed uniform superconducting properties with the superconducting transition temperature Tc of about 40 K, residual resistivity ratio (RRR) of about 10, and critical current density Jc of about 107 A cm-2 (0 T, 5 K). The thick films (∼10 νm) on sapphire substrates showed a maximum Tc of 40 K and RRR of 15, and a Jc of 1.6 × 106 A cm-2 at low applied magnetic fields even at 20 K. High quality thick films also have been obtained on metal substrates.

Original languageEnglish (US)
Article number085019
JournalSuperconductor Science and Technology
Volume21
Issue number8
DOIs
StatePublished - Aug 1 2008

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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