Zener relaxations in the FeCo alloy system

Abstract

Zener relaxation studies were performed with an inverted torsion pendulum on specimens of FeCo solid solutions with concentrations ranging from 3.18 to 42.5 wt% cobalt. Over the range of temperatures studied an Arrhenius equation adequately describes the relaxation time. Anomalously high values of the activation energy and low values of the pre‐exponential factor in the relaxation time in the cases of the 23.1 and 30.3 wt% cobalt alloys are interpreted as due to a process of ferromagnetic spin ordering in the region of the peak temperatures.