Current biased magnetoresistive spin valve sensor

摘要: A magnetoresistive read sensor based on the spin valve effect in which a component of element resistance varies as cosine angle between magnetization directions two adjacent magnetic layers is described. The includes ferromagnetic separated by non-magnetic metallic layer, easy axis each being aligned along longitudinal and perpendicular to trackwidth an storage medium. sense current flowing generates bias field sets direction layer at equal, but opposite, θ with respect thus providing angular separation 2θ absence applied signal. magnetizations both are responsive change their amount 2δθ.