Diamond-like carbon film preparation and surface coatings of oxide superconducting and ferroelectric films

Shin Ichi Aoqui, Kenji Ebihara, Yukihiko Yamagata

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Diamond-like carbon (DLC) films as well as amorphous carbon films are investigated as possible passivation and environment protection for YBa2Cu3O7-x (YBCO) oxide superconducting and Pb(ZrxTi1-x)O3 (PZT) ferroelectric thin films. The pulsed laser deposition (PLD) technique was employed to prepare the perovskite oxide films of YBCO and PZT. These film surfaces were coated by the DLC films prepared using the excimer laser ablation method. Optimum deposition condition of the PLD process for the YBCO, PZT and DLC was investigated. In the case of DLC coatings, a graphite target was ablated using a KrF excimer laser of 2-9 J cm-2 in 200-800 mTorr hydrogen ambient gas. An optical band gap of 2.0 eV was attained on room temperature substrate and high quality superconductivity of the DLC coated YBCO films was kept over 1 month. The PZT film encapsulated by the DLC layer showed no degradation due to aging over 30 days.

Original languageEnglish
Pages (from-to)591-594
Number of pages4
JournalCarbon
Volume36
Issue number5-6
DOIs
Publication statusPublished - Jan 1 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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