The crystal and magnetic structures of the double perovskite La2CoRuO6 have been investigated using neutron powder diffraction. La2CoRuO6 has a monoclinic P2(1)/n superstructure (a = 5.5724(3) Angstrom, b = 5.6288( 3) Angstrom, c = 7.8843( 4) Angstrom and beta = 89.99( 2) degrees) with a rocksalt ordered arrangement of Co and Ru over the perovskite B sites ( showing 10% Co/Ru inversion). Bond valence sums indicate the presence of Co2+ and Ru4+. Magnetization and transport measurements confirm La2CoRuO6 is an antiferromagnetic variable range hopping semiconductor with a Neel temperature of 25 K. The antiferromagnetic ordering is described by a (1/2 0 1/2) magnetic propagation vector but the spin directions cannot be determined unambiguously from neutron powder diffraction data because of the high pseudosymmetry.
|Number of pages||6|
|Journal||Journal of Materials Chemistry|
|Publication status||Published - 2005|