An analysis of the high-temperature magnetic after-effect in single-crystal cobalt

Abstract

Magnetic relaxation measurements have been performed in the temperature range 300 - 820 K on a cobalt single crystal with [0001] orientation. The relaxation spectrum may be conveniently divided into three regions. Two of these, region I and region II , lie in the hexagonal phase; the third region lies in the cubic phase. In region I we have found a broad relaxation peak, whereas region II is characterized by the complete absence of any relaxation process. In the cubic phase, region III, we have observed a plateau-like magnetic relaxation process having an approximately logarithmic time dependence. An analysis of these relaxation processes is given and they are interpreted in terms of the defects present in the sample.

Magnetic after-effect study of dislocation relaxation in Fe-based alloys

“…Experimental techniques based on mechanical [1,2,3] and magnetic [4,5,6,7] relaxation phenomena are typically used to study processes related to thermal activation of a variety of lattice defects, in particular those that can be described as point defects.…”