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Structure, crystal chemistry and magnetism of rare earth calcium-doped cobaltates: Ln2-xCaxCoO4+d (Ln = Pr, Nd, Sm, Eu and Gd)

Thorogood G.J., Orain P.Y., Ouvry M., Piriou B., Tedesco T., Wallwork K.S., Herrmann J., James M.. 2011. Solid State Sciences, 13 (12) : p. 2113-2123.

DOI: 10.1016/j.solidstatesciences.2011.08.008

Single-phase samples of Ln2-xCaxCoO4+d (Ln = Pr3+ - Gd3+) around x~1 have been prepared. For the first time, the phase field for these compounds has been defined using powder X-ray diffraction and a very narrow solid solution was observed. Under our synthetic conditions, the K2NiF4 structure was not formed for the large La3+ ion, or for compositions containing the smaller rare earths ions (

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