Abstract
The activation energy in several (YBCO){sub m}/(PBCO){sub n} superconducting multilayers was deduced from resistivity measurements in magnetic fields up to 16 T, as a function of the angle between the magnetic field and the ab planes. The activation energy U{sub 0}(B, {theta}) scales with a reduced field B{sub red} = B(sin{sup 2}{theta} + cos{sup 2}{theta}/I{sup 2}){sup 1/2}, with an angle dependent anisotropy parameter {Gamma}. A crossover from U{sub 0}{proportional{underscore}to}log B{sub red}, at low B{sub red}, to U{sub 0}{proportional{underscore}to}(B{sub red}){sup {alpha}} at high B{sub red}, is also observed. The implications of these results on vortex dynamics and on the coupling between the superconducting layers will be discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
