Eur. Phys. J. Appl. Phys.
Volume 63, Number 3, September 2013
|Number of page(s)||6|
|Section||Nanomaterials and Nanotechnologies|
|Published online||27 September 2013|
Highly crystalline core-shell FeCo-CoFe2O4 nanostructures
Department of Physics, The Catholic University of America, Washington, DC 20064, USA
2 The Vitreous State Laboratory, The Catholic University of America, Washington, DC 20064, USA
a e-mail: firstname.lastname@example.org
Revised: 30 August 2013
Accepted: 3 September 2013
Published online: 27 September 2013
Highly crystalline core-shell FeCo-CoFe2O4 nanowires were obtained from a three step process. Initially, CoFe2O4 nanowires were grown using electrospinning and annealing at higher temperatures. Through a thermal reduction under controlled conditions, CoFe2O4 nanostructures were converted to FeCo alloy nanowires. Then by natural oxidation, a highly crystalline shell of CoFe2O4 formed over the FeCo core structure. Structural and magnetic characterizations revealed the presence of highly crystalline FeCo-Co2FeO4 core-shell structure. Magnetically, the soft FeCo phase switches at a lower magnetic field compared to the hard CoFe2O4 phase, yielding an irregular hysteresis loop with a squeezed loop in the middle. The FeCo/CoFe2O4 core-shell is stable and it retains its structure for a prolonged duration.
© EDP Sciences, 2013
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