Title :
Field effect in perovskite-type manganite films on high-Tc superconductor
Author :
Sakai, J. ; Kitagawa, A. ; Tamada, T. ; Sakai, M. ; Hirao, T. ; Imai, S.
Author_Institution :
Japan Inst. of Sci. & Technol., Ishikawa, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
Layered-type junctions of perovskite-type manganite Pr1-x CaxMnO3-y (PCMO; x=0.3, 0.4, 0.5) and high-T c superconductor YBa2Cu3O7 (YBCO) were fabricated and their resistivity perpendicular to the plane were measured. A field effect was observed in which the resistivity decreased for 4 orders with 10 V of applied voltage at 30 K. Several oxygen-annealed junctions showed an abrupt drop of resistivity at about 2 V, independently to x, which is considered to be a sign of charge-ordering (CO). Annealing, on the other hand, suppressed the macroscopic resistivity of PCMO films. A field effect at room temperature was also observed
Keywords :
annealing; barium compounds; calcium compounds; charge-ordered states; electrical resistivity; ferromagnetic materials; high-temperature superconductors; interface magnetism; praseodymium compounds; yttrium compounds; 10 V; 2 V; 20 C; 30 K; Pr1-xCaxMnO3-y; PrCaMnO3; YBCO; YBa2Cu3O7; annealing; applied voltage; charge-ordering; field effect; high-Tc superconductor; layered-type junctions; macroscopic resistivity; oxygen-annealed junctions; perovskite-type manganite; perovskite-type manganite films; resistivity; room temperature; Annealing; Conductivity; High temperature superconductors; Josephson junctions; Pulsed laser deposition; Superconducting films; Superconducting logic circuits; Superconducting materials; Voltage; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
