%0 Journal Article
%A Kayser González, Paula
%A Alonso, Jose Antonio
%A Muñoz, Ángel
%A Fernandez-Díaz, María Teresa
%T Structural and magnetic characterization of the double perovskites R2NiRuO6 (R= Pr-Er): A neutron diffraction study
%D 2017
%@ 1873-2453
%U https://hdl.handle.net/20.500.14352/92255
%X Novel members of the R2NiRuO6 family of double perovskites have been prepared via a nitrate-citrate route, followed by annealing treatments in air in the 1100-1300 °C temperature range. The crystal and magnetic structures were characterized from neutron powder diffraction (NPD) data at 300 K and 2 K. All the samples are monoclinic, P21/n space group, with a √2a0×√2a0×2a0 unit-cell, compared to the simple perovskite a0 edge. Ni2+ and Ru4+ ions occupy distinct octahedral positions, with a certain antisite disordering. The magnetic structures are defined by the propagation vector k = 0. The magnetic moments of the Ni2+ cations are antiparallel to the spins of the Ru4+ sublattice; the structure can be described as ferromagnetic [011] layers antiferromagnetically (AFM) coupled to each other. For R = Ho and Er perovskites, the rare-earth moments participate in the magnetic structure: Ho3+ cations are ordered along the direction (010) in alternate planes AFM coupled and the magnetic moments of Er3+ are ferromagnetically ordered along the c axis.
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