Title :
PrBa2Cu3-yNbyO7-z insulating films for YBa2Cu3O7-y based high Tc electronics
Author :
Rogers, C.T. ; Inam, A. ; Ramesh, R. ; Tarascon, J.M. ; Remschnig, K. ; Wilkins, B.J. ; Hart, D.L.
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
The structural and transport properties of thin films of the insulating perovskite PrBa2Cu3-yNbyO 7-z (PrBCNO for y=1) were characterized. This material is a promising candidate for applications requiring high-quality epitaxial insulating layers in YBa2Cu3O7-y thin-film circuits: PrBCNO is nearly tetragonal with <2% lattice mismatch to YBCO, thus allowing the possibility of epitaxial multilayer growth. PrBCNO single films and PrBCNO-YBCO multilayers have been grown using pulsed-laser deposition: growth conditions typical for YBCO result in highly c-axis-oriented PrBCNO films and multilayers on a variety of (001) substrates. Preliminary measurements show a PrBCNO resistivity of >105 Ω-cm and an optical index of refraction of 2.25 at room temperature for y=1
Keywords :
barium compounds; high-temperature superconductors; praseodymium compounds; superconducting integrated circuits; vapour phase epitaxial growth; yttrium compounds; PrBa2Cu3-yNbyO7-z insulating films; YBa2Cu3O7-y; epitaxial multilayer growth; high temperature superconductor; pulsed-laser deposition; structural; thin films; thin-film circuits; transport properties; Insulation; Lattices; Niobium; Nonhomogeneous media; Optical films; Optical refraction; Pulsed laser deposition; Thin film circuits; Transistors; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
