Growth and properties of YBCO thin films on polycrystalline Ag substrates by inclined substrate pulsed laser deposition

Authors: Li M.¹; Ma B.¹; Koritala R.E.¹; Fisher B.L.¹; Dorris S.E.¹; Venkataraman K.²; Balachandran U.¹

Source: Superconductor Science and Technology, Volume 15, Number 6, 2002 , pp. 986-990(5)

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Abstract:

Fully c-axis-oriented YBCO films were directly deposited on polycrystalline silver substrates by inclined substrate pulsed laser ablation. The orientation and microstructure of the YBCO films were characterized by x-ray diffraction 2-scans, -scans and pole figure analysis. Surface morphology was examined by scanning electron microscopy. Irregular-mosaic-shaped supergrains were observed in the films. Raman spectroscopy was used to evaluate the quality of the YBCO films. The superconducting transition temperature (T_c) and the critical current density (J_c) of the films were determined by inductive and transport measurements, respectively. T_c 91 K with sharp transition and J_c 2.7 × 10⁵ A cm^-2 at 77 K in zero field were obtained on a film that was 0.14 m thick, 5 mm wide and 10 mm long. This work demonstrated a promising approach to obtain high-J_c YBCO films on nontextured polycrystalline silver substrate.

Language: English

Document Type: Miscellaneous

Affiliations: 1: Energy Technology Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA 2: Chemical Technology Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA

Publication date: 2002-01-01