Development of HoBCO tapes fabricated by ISD process

K. Ohmatsu*, K. Muranaka, T. Taneda, K. Fujino, H. Takei, N. Hobara, S. Honjo, Y. Takahashi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Ho1Ba2Cu3Ox, (HoBCO) tapes by using pulsed laser deposition (PLD) have been developed on flexible Ni-alloy substrates. Inclined substrate deposition (ISD) was developed to introduce in-plane alignment for buffer layers. YSZ was deposited by PLD combined with ISD as a buffer layer on Ni-alloy tape. The advantage of ISD is a high growth rate due to the self in-plane alignment without any other assistance. This was demonstrated by using a CeO2 buffer layer. A CeO2 buffer layer shows high growth rates of 1-2 μm/min. As for the growth rate of HoBCO, 4 μm/min. was confirmed. Scale-up of the PLD system for making a long tape was performed. In this system, a 200 W-KrF excimer laser over 100 h continuous operation, a large deposition chamber including long ramp heater and three 10-in target system, and a reel to reel tape transfer system up to several hundred meters were introduced and combined. The continuous sputtering system for silver layer and O2 annealing system were also introduced. By using these systems, a 50 m CeO2 buffer was continuously deposited on a Ni-alloy tape. The deposition tape speed was 0.75 m/h, thickness was 2 μm, and full-width at half-maximum was 23° in average. By depositing HoBCO on a part of this CeO2/Ni-alloy tape, Ic = 29 A/cm-width and Jc = 0.27 MA/cm2 were demonstrated.

Original languageEnglish
Pages (from-to)2462-2465
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 III
DOIs
Publication statusPublished - 2003 Jun
Externally publishedYes
Event2002 Applied Superconductivity Conference - Houston, TX, United States
Duration: 2002 Aug 42002 Aug 9

Keywords

  • High-T superconductor
  • Ho-123
  • Pulse laser deposition
  • Thin film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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