Currently, Spin valves are typically used for the magne toresistive (MR) element in MR read
heads. A spin valve includes two magnetic layers, a free layer and a pinned layer. Aspin
valve also includes a Spacer layer and a conventional antiferromagnetic (AFM) layer. The
spin valve may also include a capping layer. The free layer and pinned layer are Separated
by the Spacer layer. The magnetic moment of the pinned layer is typically fixed by exchange
coupling to the conventional AFM layer. The free layer is typically biased to ensure that the …