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

MARCOS I. OLIVA; A. HEREDIA; CARLOS I. ZANDALIZINI; MONICA CRIVELLO; E. CORCHERO

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

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 diraction, 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 ferromagnetic and superparamagnetic behavior depending on both particles size and composition.