%0 Journal Article
%T Fabrication and magnetic properties of Fe and Co co-doped ZrO2
%A J. Okabayashi
%A S. Kono
%A Y. Yamada
%A K. Nomura
%J AIP Advances
%D 2011
%I AIP Publishing LLC
%R 10.1063/1.3662044
%X We investigate the effects of Fe and Co co-doping on the magnetic and electronic properties of ZrO2 ceramics prepared by a sol-gel method, and study their dependence on the annealing temperature. Dilute Fe and Co co-doping into ZrO2 exhibits ferromagnetic behavior at room temperature for annealing temperatures above 900 ˇăC, accompanying the phase transition from tetragonal to monoclinic structure in ZrO2. The electronic structures are studied by x-ray absorption spectroscopy and M ssbauer spectroscopy, which suggest that the Fe3+ and Co2+/Co3+ mixing states are dominant in Fe and Co co-doped ZrO2.
%U http://link.aip.org/link/doi/10.1063/1.3662044