Effect of annealing in tuning magnetic hyperthermic efficiency of MWCNT/CoFe2O4nanocomposites

Annealing of a magnetic nanostructure is expected to not only change morphological features but also magnetic properties and hence magnetic hyperthermia applications. Using a simple co-precipitation method, annealed and non-annealed MWCNT/CoFe(2)O(4)nanocomposites have been synthesized, as confirmed by phases depicted in XRD. Here, a comparative study of morphological features, magnetic properties and heat dissipation capability of as-synthesized samples has been done. Transmission electron microscopy and scanning electron microscopy images reveal the agglomerated nature of the nanostructure. A visible shift in peak position of FTIR spectroscopy and Raman shift for annealed MWCNT/CoFe(2)O(4)nanocomposites from that of non-annealed MWCNT/CoFe(2)O(4)nanocomposites implies change in the vibrational features. As evident from vibrating sample magnetometer, coercivity and saturation magnetization increases for annealed MWCNT/CoFe(2)O(4)nanocomposites, heat dissipation capability quantified by the specific absorption rate and intrinsic loss parameter is also found to be amplified.