Magnetic Structure of Cs_2Fe_2O_5

Magnetic measurements indicate that Ca_2Fe_2O_5 is an antiferromagnet, with weak parasitic ferromagnetism. The lattice, with the space group Pcmn-D_^, can be considered as an oxygen deficient perovskite. The magnetic structure as determined from a neutron diffraction study is of G-type, and Fe^ spins are directed approximately along c-axis