New method of synthesis and physical properties of thick superconducting Er-123 films

Muralidhar Miryala, Naomichi Sakai, T. Machi, T. Miyajiri, I. Hirabayashi, S. Tanaka

Research output: Contribution to journalArticle

Abstract

We have developed a low-cost, short time manufacturing process using a novel method, starting from a mixture of Er2BaO4, BaCuO2, and CuO, with an excess of Er at expense of Ba. Several micrometers thick films were prepared by the screen-printing technique, spreading the mixture paste on silver substrates, processed then in Ar-1% O2 atmosphere. Using a double-step annealing process, we obtained good quality Er-123 thick films on silver substrates, with Tc (onset) 92 K. Formation of large flat grains was observed by scanning electron microscope. According to XRD analysis, the films were preferentially c-axis oriented. The magnetic (induced), self-field Jc measured at 77 K was above 32 kA/cm2. We observed a strong dependence of the transport current, Ic, on the grain size. The maximum Ic at 77 K as high as 10 A was observed in the sample with the average grain size around 40 μm. The present results indicate that our technology, enabling preparation of large-area superconducting thick films on Ag-based substrates in short processing times, is relatively cheap and appropriate for utilization in long-length RE-123 silver sheath wire production for commercial applications.

Original languageEnglish
Pages (from-to)1345-1349
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume468
Issue number15-20
DOIs
Publication statusPublished - 2008 Sep 15
Externally publishedYes

Fingerprint

Silver
Thick films
thick films
Physical properties
physical properties
silver
Substrates
synthesis
grain size
Superconducting films
Screen printing
Ointments
sheaths
printing
micrometers
Electron microscopes
manufacturing
electron microscopes
wire
Wire

Keywords

  • Critical current density (J) and I
  • ErBaO
  • LRE-BaCuO
  • SEM
  • Thick films
  • XRD

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

New method of synthesis and physical properties of thick superconducting Er-123 films. / Miryala, Muralidhar; Sakai, Naomichi; Machi, T.; Miyajiri, T.; Hirabayashi, I.; Tanaka, S.

In: Physica C: Superconductivity and its Applications, Vol. 468, No. 15-20, 15.09.2008, p. 1345-1349.

Research output: Contribution to journalArticle

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