Patent ID: 9704517
Date: 2017-07-11
CPC Classifications: G01R,G11B,H01F,H01L,Y10T

Claim:
1. A magnetoresistive (MR) sensor having a cross-track direction and a down-track direction, the sensor comprising: a first synthetic antiferromagnetic (SAF) structure having an RKKY spacer coupling layer and an amorphous alloy layer that includes a ferromagnetic material and a refractory material; a first antiferromagnetic (AFM) layer; a second SAF structure having an RKKY spacer coupling layer and an amorphous alloy layer that includes a ferromagnetic material and a refractory material; a second AFM layer; and a sensor stack between and in contact with a magnetic layer of the first SAF structure and with a magnetic layer of the second SAF structure, wherein each magnetic layer of the first and second SAF structures has a width greater than a width of each respective sensor stack contact surface, the first AFM layer, the first SAF structure, the sensor stack, the second SAF structure and the second AFM layer aligned, in order, along the down-track direction.