Magnetic and magnetotransport behavior of granular Fe Ag100− thin films

Abstract We present magnetic and magnetotransport properties of Fe x Ag 100− x granular thin films prepared by the pulsed laser deposition technique. Increasing the Fe nanoparticles, x , the interactions among them modify the magnetic response from an interacting superparamagnetism to a ferromagnetic-like behavior with a crossover at x = 25. For this value, an extraordinary Hall effect becomes dominant while magnetoresistance decrease. The appearance of in-plane anisotropies are discussed through the study of extraordinary Hall effect.