Magnetic behavior of Mg - Al - Zn - Fe mixed oxides from precursors layered double hydroxide

OLIVA, M. I.; HEREDIA, A.C.; ZANDALAZINI, C. I.; CRIVELLO, M. E.; CORCHERO, E.

Buenos Aires

Congreso; At the Frontiers of Condensed Matter V "Current Trends and Novel Materials"; 2010

Centro Atómico Constituyentes - Comisión Nacional de Energía Atómica

Mixed oxides of Mg-Al-Zn-Fe were obtained by calcination of layered double hydroxides (LDH) prepared by coprecipitation reaction with hydrothermal treatment. The structural characterization of precursors and the mixed oxides was carried out by X rays diffraction, showing a increases of ZnO phase with the increase of the zinc content. Magnetic behavior was studied by vibrating sample magnetometer (VSM) and by a superconducting quantum interference device (SQUID) showing both paramagnetic and superparamagnetic behavior depending on both particles size and composition.