Abstract
The giant magnetoresistance (GMR) effect and magnetization curves ofCu80Co20 granular thin films are studied and measured ina superparamagnetism temperature (180 K). The correlation between theGMR effect and the magnetization is analysed in a unified framework.These two independent properties are fitted by assuming that there aretwo size distributions in the Co nano-particle population. Under anassumption, good fittings are achieved for both the GMR and themagnetization, using the minimal number of parameters. The obtainedaverage particle sizes for the smaller and larger particles are 1.0 nmand 2.8 nm, respectively. In fitting the magneto-transport, a powerscaling relationship with the particle size for each size population isproposed, and the fitted results reveal that a certain degree ofmagnetic bulk scattering is present in larger particles.
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