In situ high rate growth of high temperature superconductor tapes

Luke S.J. Peng, Weizhi Wang, William Jo, Tsuyoshi Ohnishi, Ann F. Marshall, Robert H. Hammond, Malcolm R. Beasley, Eric J. Peterson, Richard E. Ericson

Research output: Contribution to journalConference articlepeer-review

18 Scopus citations

Abstract

In situ high rate growth of YBa2Cu3O7-δ superconducting films has been carried out using e-beam deposition. A deposition flux controller was developed to monitor and control the deposition rates using tunable diode, laser-based, atomic absorption. A wide range of temperatures, deposition rates, and oxygen fluxes including atomic, molecular oxygen, have been explored in order to understand both kinetic and thermodynamic stability. Critical current density above 1 MA/cm2 has been achieved on SrTiO3 substrate samples with growth rates up to 75 Å/sec. Samples prepared on IBAD YSZ/Ni tapes exhibit similar resistivity properties and x-ray diffraction patterns. However, critical current densities of the tapes are around 5 kA/cm2 or lower. The poor critical current density of the tape is attributed to interactions between the YBa2Cu3O7-δ film and the YSZ buffer layer.

Original languageEnglish
Pages (from-to)3375-3378
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 III
DOIs
StatePublished - Mar 2001
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 17 Sep 200022 Sep 2000

Keywords

  • Critical current
  • E-beam deposition
  • IBAD
  • In situ growth
  • Phase stability
  • YBCO superconductor tapes

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