Synthesis and characterization of the new twodimensional Heisenberg antiferromagnet double perovskite BaLaCuSbO6

M. CECILIA BLANCO; SERGIO ALEXIS PAZ; VIVIAN M. NASSIF; JULIO J. GUIMPEL; RAÚL E. CARBONIO

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2015 vol. 44 p. 10860 - 10860

!--[if gte mso 9]> The BaLaCuSbO6 double perovskite has been successfully synthesized by solid state reaction under an air atmosphere. Its structure was refined using powder neutron diffraction in the monoclinic space group I2/m with a 4% antisite disorder on the B cations. Magnetic measurements give signs of 2D-antiferromagnetic behaviour with TN around 64 K. The Jahn-Teller distortion produced by Cu2+ ions favours a crystallographic tetragonal distortion and consequently the in-plane super-superexchange antiferromagnetic interactions, J90°, are favoured over the in-plane J180° antiferromagnetic exchange interactions. Both, J and J´ magnetic interactions have been eva