Coexistence of, and Competition between, Superconductivity and   Charge-Stripe Order in La(1.6-x)Nd(0.4)Sr(x)CuO(4)
  Previously we have presented evidence for stripe order of holes and spins in La(1.6-x)Nd(0.4)Sr(x)CuO(4) with x=0.12. Here we show, via neutron diffraction measurements of magnetic scattering, that similar order occurs in crystals with x=0.15 and 0.20. Zero-field-cooled magnetization measurements show that all 3 compositions are also superconducting, with the superconducting transition temperature increasing as the low-temperature staggered magnetization decreases. 
J. M. Tranquada, J. D. Axe, N. Ichikawa, A. R. Moodenbaugh, Y.   Nakamura, S. Uchida