Electron microscopy of giant magnetoresistive granular AuCo alloys

Abstract The microstructure and the magnetic properties of melt-spun Au100-xCox (x = 6.5, 16.7, 28.4) were investigated. The eutectic decomposition allows one to synthesize a lamellar microstructure. Changes of the size distribution and shape of the Co precipitates during annealing influence the magnetic behavior and the transport properties of the investigated samples.