Absence of ferromagnetism in Fe-doped TiO2 nanoparticles

作者：Balcells L I^*; Frontera C; Sandiumenge F; Roig A; Martinez B; Kouam J; Monty C

来源：Applied Physics Letters, 2006, 89(12): 122501.

DOI：10.1063/1.2355438

The structural and magnetic properties of Ti1-xFexO2-epsilon (x approximate to 0.13) nanoparticles prepared by vaporization-condensation method are analyzed. Samples, mainly of rutile phase, exhibit a pronounced mosaic structure and are free of secondary phases or impurities. Mossbauer spectroscopy evidences the absence of magnetic ordering and shows features indicative of the existence of two doublets assigned to two different structural arrangements of Fe3+ ions substituting for Ti4+ ions in the rutile structure. The application of the Goodenough-Kanamori rules clearly indicates that conventional FM ordering should not be expected in Fe-doped TiO2 with rutile structure.

• 出版日期2006-9-18