Magnetic-field effects on the charge-spin stripe order in La-214 high-Tc cuprates

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Magnetic-field effects on the charge-spin stripe order in La-214 high-Tc cuprates have been investigated from measurements of the in-plane electrical-resistivity, Rhoₐb. In La₂-xBaₓCuO₄ with x=0.10 and La₂-xₛrₓCuO₄ with x=0.115 where the incommensurate charge peaks are weak and unobservable in zero field in elastic neutron-scattering measurements, respectively, the normal-state value of Rhoₐb at low temperatures markedly increases with increasing field up to 27 T. For La₂-xBaₓCuO₄ with x=0.11 and Zn-substituted La₂-xₛrₓCu₁-yZnyₒ₄ with x=0.115 and y=0.02 where the charge stripe order is fairly stabilized in zero field, on the other hand, the increase in Rhoₐb with increasing field is negligibly small. In conclusion, when the charge-spin stripe order is not fully stable in zero field, magnetic field operates to stabilize the charge-spin stripe order. The value of Rhoₐb increases with increasing field depending on the stability of the charge stripe order.