INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Electronic and magnetic properties of iron filled carbon nanotubes
M WEISSMANN; L. A. ERRICO
Workshop; X Latin American Workshop on Magnetism, Magnetic Materials, and their Applications (LAW3M-2013).; 2013
UBA, Dtpo de Fisica CNEA
The cavity inside a carbon nanotube provides a very small one dimensional space for guest materials. Nanotubes filled with metals, alloys, fullerenes and biomaterials have been produced using different synthesis techniques. The advantage of these materials is that the nanotube protects the fillings from oxidation and mechanical damage. In particular, encapsulated magnetic nanowires could be used for many applications if the effects of the low dimensionality were well understood and the fabrication processes well controlled. We performed ab initio calculations for free standing iron nanowires and for iron filled single wall carbon nanotubes of a small diameter, such as reported in experimental work. We obtained the local magnetic moments and hyperfine fields in both systems and compared the results with the experiments and with those for bulk iron. The fact that the Fe-C interaction is fundamental to explain the Mossbauer experiments is at present our main conclusion.