Abnormal Electrical Resistivity of Co−Fe−Si−B−Nb−R Alloys in Amorphous and Crystalline States.

Electrical resistivity of Co48Fe25Si4B19Nb4 amorphous alloy and with small additions of rare-earth metals (= Nd, Sm, Tb, Yb) was studied using the AC four-probe method. It was found that these alloys have a specific behavior of electrical resistivity after crystallization-temperature dependences of resistivity at cooling are non-linear and can be fitted as ln R ~ T−1/4. [ABSTRACT FROM AUTHOR]