Title :
Polycrystalline MgB2 Films on Flexible YSZ Substrates Grown by Hybrid Physical-Chemical Vapor Deposition
Author :
Pogrebnyakov, A.V. ; Maertz, E. ; Wilke, R.H.T. ; Li, Qi ; Soukiassian, A. ; Schlom, D.G. ; Redwing, J.M. ; Findikoglu, A. ; Xi, X.X.
Author_Institution :
Pennsylvania State Univ., University Park
fDate :
6/1/2007 12:00:00 AM
Abstract :
We report properties of polycrystalline MgB2 films deposited on thin flexible yttium-stabilized zirconia (YSZ) substrates by hybrid physical-chemical vapor deposition. The MgB2 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 107 A/cm2 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 MgB2 films on single-crystalline sapphire substrate was observed. The result shows promise of polycrystalline MgB2 films for applications in superconducting digital circuits as well as in coated conductor wires.
Keywords :
bending; chemical vapour deposition; critical current density (superconductivity); high-temperature superconductors; magnesium compounds; superconducting epitaxial layers; superconducting transition temperature; surface resistance; Al2O3 surface; MgB2; Y2O3-ZrO2 surface; bending; coated conductor wires; digital circuits; epitaxial films; hybrid physical-chemical vapor deposition; microwave surface resistance; polycrystalline films; radius 10 nm; self-field critical current density; single-crystalline sapphire substrate; superconducting transition; thin flexible yttium-stabilized zirconia substrates; transition temperature; Chemical vapor deposition; Conductive films; Critical current density; Substrates; Superconducting epitaxial layers; Superconducting filaments and wires; Superconducting films; Superconducting microwave devices; Superconducting transition temperature; Surface resistance; Flexible YSZ substrates; hybrid physical-chemical vapor deposition; magnesium diboride; polycrystalline films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.897981
