Abstract
In this paper we report the transport properties ofc-axis-orientedsuperconducting La1.44Nd0.4Sr0.16CuO4 films on LaSrAlO4 substrates with different thicknesses in various magnetic fields parallel and perpendicular to thec axis of the films. It is found that with decreasing film thickness there is acrossover from the parallel shift to fan-shape broadening in the resistivetransitions. Moreover, for both field configurations, the flux pinning potentialU0(H) of the film shifts upward with an order of magnitude with increasing in-plane compressivestrain. These results indicate that the compressive epitaxial strain and strain-induceddestabilization of the static charge stripes are important aspects for the promotion ofsuperconducting transition temperature as well as the flux pinning potential.
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