Magnetic and structural properties of La3Ni2SbO9

D. G. FRANCO; R. E. CARBONIO; G. NIEVA

Valparaíso. Chile.

Congreso; Sólidos 2009; 2009

 

We have synthesized the double perovskite La₃Ni₂SbO₉. A structural analysis of the XR diffraction pattern indicates that the crystalline symmetry is that of the spatial group P2₁/n, with two different crystallographic sites for Ni²⁺ and Sb⁵⁺. Magnetization vs. Tempera-ture curves indicate a paramagnetic behavior of Ni²⁺ down to Tc=176K, where the system undergoes a ferromagnetic transition. Magnetization versus Magnetic Field measured below 20 K show the same qualitative behavior: the initial branch of the curves lies outside the hysteresis loop. This was found in nanoparticles where strong surface anisotropy was detected.