Effect of annealing temperature on structure and magnetic properties of ultra-thin high-purity electrolytic Fe ribbons

Abstract This paper reports change in the structure and magnetic properties of ultra-thin electrolytic Fe ribbons with the annealing temperature between 873-1173 K. The structure of the ribbon was polycrystalline with the bcc phase regardless of the annealing temperature, while the crystal orientation changed from (200) and/or (211) to random as the annealing temperature increased. As for magnetic properties of the ribbons, their saturation magnetization remained almost constant for all annealing temperatures except 873 K, and their core loss did not change in the measured frequency less than 20 kHz regardless of the annealing temperature. Therefore, these results suggest that the ultra-thin electrolytic Fe ribbons are one of the candidates as the core materials in the frequency range below several tens kHz.