  Carbon nanotubes are a fraction of the size of transistors used in today's
best microchips, as it could reduce power demands and heating in next
electronics revolution. Present study investigates the electronic and magnetic
structure of multi walled carbon nanotubes (MWCNT) synthesized by chemical
vapor deposition technique using near edge x-ray absorption spectroscopy
(NEXAFS) measurement at C K-edge and x-ray magnetic circular dichroism (XMCD)
at Co and Fe $L_{3,2}$ -edges. NEXAFS at C K-edge shows significant
$\pi$-bonding, and Fe(Co) L-edge proves the presence of Co$^{2+}$ and Fe$^{2+}$
in octahedral symmetry, and embedded in C-matrix of MWCNT. Element specific
hystersis loops and XMCD spectra clearly shows that these MWCNTs exhibits room
temperature ferromagnetism. These measurements elucidated the electronic
structure of CNTs and presence of magnetic interactions at room temperature.
