Magnetic properties of bulk Fe-doped indium oxide

This paper presents the influence of the iron fraction and of the sintering atmosphere on the magnetic properties of bulk iron-doped indium oxide In2-xFexO3. The formation of a solid solution between beta-Fe2O3 and In2O3 up to x similar to 0.3 under argon atmosphere and x similar to 0.55 under air has been evidenced. All single-phase samples are paramagnetic, with dominant antiferromagnetic interactions and a paramagnetic effective moment originating from Fe3+ ions. For the higher x values, a cluster glass or superparamagnetic behaviour can be closely linked to the presence of Fe2O3 or Fe3O4 inclusions. No trace of ferromagnetism has been detected, even with samples prepared under argon.