Room-temperature ferromagnetism in hierarchically branched MoO3 nanostructures

Hierarchically branched MoO3 nanostructures on Ti substrates were successfully prepared via a simple and controllable electrodeposition–heat-treatment method. XPS and Raman results indicate that these branched MoO3 nanostructures possess some oxygen vacancies. The magnetic measurements show the prepared branched MoO3 nanostructures exhibit ferromagnetic behaviour at room temperature. The observed room-temperature ferromagnetism can be mainly ascribed to the oxygen vacancies on the surface of the samples.