Sensitive asymmetrical MI effect in crossed anisotropy sputtered films

This paper reports experimental results to obtain a sensitive and asymmetrical MI effect in crossed anisotropy sputtered films magnetized with a de-biased ac or pulse current. The sensitive and asymmetrical MI effect occurs, because the crossed anisotropy films induce spiral magnetic anisotropy, The crossed anisotropy film (Co72Fe8B20) was made on a glass substrate using de sputtering with two layers having 4.5 mum thickness each applying a de field of 21 kA/m along with a designed anisotropy direction. A linear MI characteristic with a field detection sensitivity of 0.15 %/(Nm) (12 %/Oe) was obtained, which realizes a sensitive linear field sensor without any dr bias field.