Abstract
Self-polarized ferrimagnetic nanowires of CoFe 2 O 4 are electrochemically grown by the electrodeposition technique in AAO membranes. XRD, EDS and SQUID analysis confirm the formation of highly stoichiometric CoFe 2 O 4 nanowires with high magnetic response into 20 nm-AAO membrane. SEM and AFM images revealed a total filling of the AAO membrane with Co and Fe at an applied potential of −1.2 V. In addition, the electrodeposition and cooling in the presence of an applied magnetic field improve the magnetic response of CoFe 2 O 4 nanowires. The SQUID measurements confirmed the elaboration of CoFe 2 O 4 nanowires with an internal magnetic field of 1.52 T. As a result, this ferrimagnetic nanowired substrate will be suitable for future miniaturized self-biased microwave devices. • Successful electrochemical growth of CoFe 2 O 4 nanowires in AAO membranes. • The achievement of a total filling of the AAO membrane with CoFe 2 O 4 nanocrystallites for an applied potential of -1.2 V. • The electrochemical growth and cooling in the presence of an applied magnetic field produce a partially hard ferrimagnetic nanocomposite with an internal magnetic field of 1.52 T. • The elaborated CoFe 2 O 4 nanowires can will be suitable for the miniaturized self-biased microwave devices.
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