Magnetic phase diagram and correlation between metamagnetism and superconductivity in Ru0.9Sr2YCu2.1O7.9Rashmi Nigam, Shane J. Kennedy, Alexey V. Pan and Shixue DouEur. Phys. J. B, 86 6 (2013) 280DOI: https://doi.org/10.1140/epjb/e2013-40019-2