Transparent magnetic oxide (TMO) thin films of magnetite (Fe3O4) were grown on top of a (Zn,Al)O transparent conducting oxide on a glass substrate. The polycrystalline magnetite thin films show the typical Raman spectrum of Fe3O4, a sharp Verwey transition at 120 K and hysteretic behavior. The highest achieved average transmittance in the visible range (400-800 nm) for the entire multilayer was slightly below 80%. TMOs permit the inclusion of magnetic functionalities into transparent electronics. Our results show that TMOs can be successfully used to add magnetic functionalities to transparent conducting oxides. (C) 2010 Elsevier B.V. All rights reserved.