Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δ and La_0.5Ba_0.5CoO_3–δ perovskites

A study by neutron diffraction, thermogravimetry and electrical resistivity shows that the cationic order in the tetragonal LaBaCo₂O_6−δ perovskite phase induces a major concentration of oxygen vacancies in the LaO layers and losses in dimensionality for the transport of oxygen-ion and electron-hole charge carriers compared to the cationic disorder in the cubic La_0.5Ba_0.5CoO_3−δ phase.