Title :
Superconductivity and Hall effect of YBa2Cu3O y/La0.7Ca0.3MnOy multilayers
Author :
Chen, J.C. ; Yang, H.C. ; Wang, S.Y. ; Wang, L.M. ; Horng, H.E.
Author_Institution :
Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
3/1/2001 12:00:00 AM
Abstract :
We measured the transport properties of a-axis oriented YBa2 Cu3Oy/La0.7Ca0.3MnOy (YBCO/LCMO) multilayers to study the effects of layer coupling on the superconductivity, magnetoresistance and anomalous Hall effects. The decrease of flux pinning in the YBCO/LCMO multilayer causes the diminishing of sign reversal of Hall coefficients. The normal state magnetoresistance was found to depend on the coupling strength of ferromagnetic layers
Keywords :
Hall effect; barium compounds; calcium compounds; colossal magnetoresistance; ferromagnetic materials; flux pinning; high-temperature superconductors; lanthanum compounds; magnetic multilayers; superconducting superlattices; yttrium compounds; Hall effect; YBCO/LCMO multilayer; YBa2Cu3O7-La0.7Ca 0.3MnO; YBa2Cu3Oy/La0.7Ca 0.3MnOy multilayers; a-axis oriented YBa2Cu3Oy/La0.7Ca0.3MnO y multilayers; anomalous Hall effects; coupling strength; ferromagnetic layers; flux pinning; layer coupling; magnetoresistance; normal state magnetoresistance; sign reversal; superconductivity; transport properties; Colossal magnetoresistance; Conductivity; Flux pinning; Hall effect; Magnetic field measurement; Magnetic multilayers; Superconducting microwave devices; Superconductivity; Superlattices; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
