Sajitha, EP and Prasad, V and Subramanyam, SV (2006) Conduction mechanisms in carbon matrix containing ferromagnetic nanoparticles. In: Physica B . (In Press)
We have investigated the low temperature resistance and magnetoresistance behaviour of the carbon matrix containing ferromagnetic nanoparticles. A range of compositions with different levels of disorder and varying iron content were prepared from the pyrolysis of organic precursor maleic anhydride and ferrocene. The temperature dependence of resistivity shows a negative temperature coefficient in the entire measurement range of 1.3 to 300 K. An increase in conductivity with the external magnetic field and a characteristic upturn at low temperature, is seen in all the compositions. The zero-field conductivity and the magnetoresistance can be explained with in the framework of two-dimensional electron-electron interaction model and the Kondo-like behaviour.
|Item Type:||Journal Article|
|Keywords:||Localization conductivity;Magnetoresistance;Kondo effect|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||10 Aug 2006|
|Last Modified:||19 Sep 2010 04:31|
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