Structural and magnetic properties of Co_1-xZn_xFe₂O₄ nanoparticles

Co_1-xZn_xFe₂O₄ nanoparticles, prepared by the polyvinyl alcohol sol--gel method, have been investigated by x-ray diffraction and Mössbauer spectroscopy. These results are compared with those for the bulk material. The lattice parameters of CoZn ferrite nanoparticles are larger than those of the bulk material. Thermal scanning of Mössbauer measurement shows that the transition temperatures for nanoparticles are higher than those of the bulk material except for the sample CoFe₂O₄.