Title :
Epitaxial YBa/sub 2/Cu/sub 3/O/sub 7- delta / thin films on LaMgAl/sub 11/O/sub 19/: new substrates with low dielectric losses
Author :
Xiong, G.C. ; Lian, G.J. ; Zhu, X. ; Li, J. ; Li, Y.J. ; Gan, Z.Z. ; Jing, D. ; Shao, K. ; Guo, H.Z.
Author_Institution :
Dept. of Phys., Peking Univ., China
fDate :
3/1/1993 12:00:00 AM
Abstract :
Pulsed laser ablation was used to deposit superconducting YBa/sub 2/Cu/sub 3/O/sub 7- delta / thin films with T/sub c/=89.5 K on an LaMgAl/sub 11/O/sub 19/ substrate. X-ray diffraction patterns show that the YBa/sub 2/Cu/sub 3/O/sub 7- delta / films were epitaxially grown with their c-axis perpendicular to the substrate surface. LaMgAl/sub 11/O/sub 19/ has low dielectric constant and small loss tangent. Using the LaMgAl/sub 11/O/sub 19/ substrates, YBa/sub 2/Cu/sub 3/O/sub 7- delta / microstrip resonators were fabricated.<>
Keywords :
X-ray diffraction examination of materials; barium compounds; dielectric losses; high-temperature superconductors; lanthanum compounds; magnesium compounds; microstrip components; pulsed laser deposition; substrates; superconducting epitaxial layers; superconducting junction devices; yttrium compounds; 89.5 K; LaMgAl/sub 11/O/sub 19/; X-ray diffraction patterns; YBa/sub 2/Cu/sub 3/O/sub 7- delta /; epitaxial thin films; high temperature superconductor; low dielectric constant; low dielectric losses; microstrip resonators; pulsed laser ablation; small loss tangent; substrates; Dielectric constant; Dielectric losses; Dielectric substrates; Laser ablation; Optical pulses; Pulsed laser deposition; Sputtering; Superconducting epitaxial layers; Superconducting thin films; X-ray diffraction;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
