CuBe/FeCoNi tubes were fabricated by electroplating.
The effect of field annealing on the structure, magnetic properties and magnetoimpedance was studied.
The maximum magnetoimpedance ( MI) ratio depends strongly on the heat treatments.
The DC field annealing leads to the highest total impedance MI ratio.
Transformation from one- to two-peaks MI curves was observed in the DC field annealed tubes.