Charge and spin ordering in Nd{1/3}Sr{2/3}FeO{3}
  We have investigated the charge and spin ordering in Nd{1/3}Sr{2/3}FeO{3} with neutron diffraction technique. This sample undergoes a charge ordering transition accompanying charge disproportionation of 2Fe4+ -> Fe3+ + Fe5+. We measured the superlattice reflections due to the charge and spin ordering, and confirmed that charges and spins order simultaneously at Tco = 185 K. The ordering pattern of charges and spins in this sample can be viewed as three dimensional stripe order, and is compared with two dimensional stripe order observed in other transition metal oxides. 
R. Kajimoto, Y. Oohara, M. Kubota, H. Yoshizawa, S. K. Park, Y.   Taguchi, Y. Tokura