Jc Characteristics in high magnetic field and microstructure of RE1+xBa2-xCu3O6+y films

Y. Yoshida, K. Matsumoto, M. Miura, Y. Ichino, Y. Takai, A. Ichinose, M. Mukaida, S. Horii

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23 Citations (Scopus)

Abstract

We have investigated the superconducting properties and the microstructure of c-axis oriented Sm1+xBa2-xCu3O6+y (SmBCO) thin films deposited on MgO substrates by pulsed laser deposition (PLD). In particularly, the use of thin c-axis oriented seed layer grown at high temperature enabled us to obtain fully c-axis oriented SmBCO films at relatively low temperature (∼740 °C). The values of Tc for the present films are within the range of 91.5-92.5 K. From their J c-B characteristics, it has been observed that the superconducting properties of SmBCO (x = 0.04, 0.08) films are superior to those of the YBa 2Cu3O7-y thin films for B∥c, 5 T at 77 K. The Jc values of the SmBCO films measuring 2.8 × 105 A/m2 for 5 T of B∥c at 77 K are comparable to that of NbTi for 5 T at 4.2 K. Furthermore, the superconducting properties in SmBCO change with the substitution of Sm-Ba. The Electron microscopic studies with EDX and S-TEM analysis have revealed that the Sm/Ba ratio fluctuates within the range of x = 0-0.14 with a wavelength of ∼100 nm. High-Jc values in high magnetic fields at 77 K demonstrate the potential of REBCO films for high-field applications of oxide superconductor.

Original languageEnglish
Pages (from-to)1043-1050
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberII
DOIs
Publication statusPublished - Oct 7 2005
Externally publishedYes
EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
Duration: Nov 23 2004Nov 25 2004

All Science Journal Classification (ASJC) codes

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

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