Magnetoresistive read heads based on giant magnetoresistance spin-valves or magnetic tunnel junctions have been widely used in magnetic recording. In the fabrication of these nano structures, the surface roughness is crucial to the performance of the devices, both electrically and magnetically. In this work, we theoretically study the effect of roughness and pinholes in magnetic tunnel junctions and nanowire systems. Results are compared to experiment.
Bibliographical noteFunding Information:
This work was supported by the National Science Foundation under award No. ECS-0621868. The authors are grateful for resources from the University of Minnesota Supercomputing Institute.
- Index Terms-Magnetic tunnel junction
- Magnetoresistive read head
- Surface roughness