Magnetic Properties and Resistivity Measurement of Nanocrystalline Cu70Fe18Co12 Alloys
W. Laslounia,b, Z. Hamlatia,b and M. Azzaz b
aDépartement de Physique, Faculté des Sciences, Université de Blida, Algeria
bLaboratoire de Science et Génie des Matériaux, U.S.T.H.B, Alger, Algeria
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The mechanical alloying process has been used to prepare nanocrystalline Cu70Fe18Co12 alloy from elemental Cu, Fe and Co powders in a planetary ball mill under argon atmosphere. The interdiffusion of Cu, Fe and Co leads to a heterogeneous solid solution with Cu-Fe-Co rich environments after 12 h of milling. The end product is a mixture of a highly disordered structure, fcc-Cu (Fe-Co), phase having different microstructural and structural parameters. For all the elaborate series, the evolution of coercive field and the remanence according to the time of milling is analyzed. The coercivity, Hc, decreases rapidly up to 8 h of milling to about 0.3 A/m and then the coercivity, increases to a maximum at 54 h. The influence of the time of milling at the resistivity of these alloys is shown.

DOI: 10.12693/APhysPolA.128.B-190
PACS numbers: 81.07.-b, 81.20.-n, 81.20.Ev, 81.07.Wx