Magnetoresistance and Hall effect in e-doped superconducting SrLaCuO thin films

Details Magnetoresistance and Hall effect in e-doped superconducting SrLaCuO thin films Magnetoresistance and Hall effect in e-doped superconducting SrLaCuO thin films

2008-11-24

arxiv.org/abs/0811.3931v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures; to appear in Proceedings of LT25, Journal of Physics : Conference Series

Scientific paper

10.1088/1742-6596/150/5/052086

We have epitaxially grown c-axis oriented SrxLa1-xCuO2 thin films by rf sputtering on KTaO3 substrates with x = 0.12. The as-grown deposits are insulating and a series of superconducting films with various Tc(R=0) up to 26 K have been obtained by in-situ oxygen reduction. Transport measurements in the ab plane of these samples have been undertaken. We report original results on the temperature dependence of the Hall effect and on the anisotropic magnetoresistance (T > Tc). We discuss the magnitude of upper critical fields and anisotropy, the Hall effect, which presents changes of sign indicative of the existence of two types of carriers, the normal state magnetoresistance, negative in parallel magnetic field, a possible signature of spin scattering. These properties are compared to those of hole-doped cuprates, such as BiSr(La)CuO with comparable Tc.

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