Chemical Pressure Effect on the Magnetic Order of the La1.4Sr1.6Mn2O7   Bilayered Manganite
  In this Communication is it shown the role of Ca-doping in stabilizing the A-type AFM structure of the optimally doped La1.4Sr1.6Mn2O7 bilayered manganite. 
Lorenzo Malavasi, Maria Cristina Mozzati, Clemens Ritter, Carlo Bruno   Azzoni, and Giorgio Flor