Sensitive asymmetrical MI effect in crossed anisotropy sputtered films

This paper reports experimental results to obtain a sensitive and asymmetri cal MI effect in crossed anisotropy sputtered films magnetized with a de-bi ased 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 d e sputtering with two layers having 4.5 mum thickness each applying a de fi eld of 21 kA/m along with a designed anisotropy direction. A linear MI char acteristic with a field detection sensitivity of 0.15 %/(Nm) (12 %/Oe) was obtained, which realizes a sensitive linear field sensor without any dr bia s field.