- The magnetic properties of La1-σMnO3 depend on the relative concentration of Mn+4/Mn+3 introduced by vacancies on La sites. Neutron diffraction, magnetization, AC susceptibility and heat capacity measurements have been performed on a powdered sample annealed in Argon. At low temperature the spins are canted; a phase transition occurs at 117 K. These data are compared with those of a sample annealed in air which shows a ferromagnetic transition at 245 K.
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