• Open Access

Magnetization of Fe-oxide based nanocomposite tuned by surface charging



Aiming at a voltage-control of magnetism, the magnetization of a porous γ-Fe2O3–Pt nanocomposite is studied under the influence of charging the surfaces of the porous structure in an electrolyte. Reversible variations of the magnetization of up to 10.4% could be achieved upon charging in the regime where electrochemical adsorption and desorption occurs. The observed variation of the magnetization with electrochemical charging is assigned to the γ-Fe2O3 nanoparticles whereas the conductive network of Pt nanoparticles is necessary for charging. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)