Polycrystalline MgB sub(2) Films on Flexible YSZ Substrates Grown by Hybrid Physical-Chemical Vapor Deposition

• Published in: IEEE transactions on applied superconductivity Vol. 17; no. 2
• Main Authors: Pogrebnyakov, A V, Maertz, E, Wilke, RHT, Li, Qi, Soukiassian, A, Schlom, D G, Redwing, J M, Findikoglu, A, Xi, X X
• Format: Journal Article
• Language: English
• Published: 01.01.2007
• Subjects: Borides; Conductors (devices); Digital circuits; Magnesium compounds; Superconductivity; Vapor deposition; Yttria stabilized zirconia; Zirconium dioxide
• DOI: 10.1109/TASC.2007.897981
• ISSN: 1051-8223

We report properties of polycrystalline MgB sub(2) films deposited on thin flexible yttium-stabilized zirconia (YSZ) substrates by hybrid physical-chemical vapor deposition. The MgB sub(2) films show a transition temperature of 38.9 K with a narrow superconducting transition (0.1 K). The self-field critical current density in the films reaches 10 super(7) A/cm super(2) at low temperatures. These properties do not change after repeated bending over a radius of 10 mm. Low microwave surface resistance comparable to those obtained in epitaxial MgB sub(2) films on single-crystalline sapphire substrate was observed. The result shows promise of polycrystalline MgB sub(2) films for applications in superconducting digital circuits as well as in coated conductor wires.