Title :
Pulsed laser deposition of novel HTS multilayers for passive and active device applications
Author :
Chrisey, D.B. ; Horwitz, J.S. ; Pond, J.M. ; Carrol, K.R. ; Lubitz, P. ; Grabowski, K.S. ; Leuchtner, R.E. ; Carosella, C.A. ; Vittoria, C.V.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Multilayered structures have been fabricated from binary combinations of the high-T/sub c/ superconductor YBa/sub 2/Cu/sub 3/O/sub 7- delta / (YBCO) and the ferrite BaFe/sub 12/O/sub 19/ (BFO) or the ferroelectric Sr/sub 0.5/Ba/sub 0.5/TiO/sub 3/ (SBT). The combination of YBCO and BFO was found to destroy the superconductivity of the YBCO layer. Vibrating sample magnetometer measurements of the BFO layer still indicated a large uniaxial anisotropy. The underlying YBCO layer of an SBT/YBCO bilayer still had high quality transport properties unaffected by the SBT layer (T/sub c/ approximately 91 K. J/sub c/(77 K) approximately 2*10/sup 6/ A/cm/sup 2/). A thin-film, normal metal/SBT transmission line, patterned in microstrip, demonstrated a wealth of temperature and electric field dependent dielectric information for the frequency range tested (f>
Keywords :
barium compounds; ferrites; ferroelectric materials; high-temperature superconductors; microstrip lines; pulsed laser deposition; strontium compounds; superconducting microwave devices; superconducting thin films; yttrium compounds; 100 K; 30 MHz to 3 GHz; 300 to 11 K; HTS multilayers; YBa/sub 2/Cu/sub 3/O/sub 7- delta /-BaFe/sub 12/O/sub 19/; YBa/sub 2/Cu/sub 3/O/sub 7- delta /-Sr/sub 0.5/Ba/sub 0.5/TiO/sub 3/; active device applications; dielectric constant; electric field dependent dielectric information; field-induced phase difference; high quality transport properties; high-T/sub c/ superconductor; large uniaxial anisotropy; microstrip; normal metal/SBT transmission line; passive device applications; pulsed laser deposition; temperature dependence; vibrating sample magnetometer measurement; Ferrites; Ferroelectric materials; Frequency; High temperature superconductors; Nonhomogeneous media; Optical pulses; Pulsed laser deposition; Strontium; Superconducting transmission lines; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
