Effect of Temperature on Magnetization Processes in Amorphous Rapidly Solidified FeSiB/CoSiB Bilayer Ribbons

Abstract

Amorphous bilayers consisting of Fe-Si-B and Co-Si-B layers have been prepared by planar ow casting from a single crucible using a double-nozzle technique. Temperature dependencies of magnetization and hysteresis loops have been investigated in a wide temperature range. At room temperature, the eects of interlayer stresses, induced in material due to dierent thermal expansion coecients of two mechanically interconnected soft magnetic layers, resulted in rounded hysteresis loops with attened central part, indicating a dominant role of magnetization rotational processes. With an increase of measurement temperature, the interlayer stresses are relieved and the hysteresis loops became more squared.