Temperature dependence of the in-plane electrical resistivity, ρ ab, in various magnetic fields has been measured in the single-crystal La 2-xBa xCuO 4 with x=0.08, 0.10, 0.11 and La 1.6-xNd 0.4Sr xCuO 4 with x=0.12. It has been found that the superconducting transition curve shows a so-called fan-shape broadening in magnetic fields for x=0.08, while it shifts toward the low-temperature side in parallel with increasing field for x=0.11 and 0.12 where the charge-spin stripe order is formed at low temperatures. As for x=0.10, the broadening is observed in low fields and it changes to the parallel shift in high fields above 9 T. Moreover, the normal-state value of ρ ab at low temperatures markedly increases with increasing field up to 15 T. It is possible that these pronounced features of x=0.10 are understood in terms of the magnetic-field-induced stabilization of the stripe order suggested from the neutron-scattering measurements in the La-214 system. The ρ ab in the normal state at low temperatures has been found to be proportional to ln(1/T) for x=0.10, 0.11, and 0.12. The ln(1/T) dependence of ρ ab is robust even in the stripe-ordered state.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2005 Mar 1|