Antiparallel exchange biased multilayers for low magnetic noise magnetic field sensors

What is it about?

The paper describes the possiblity to use an antiparallel (AP) exchange biasing scheme to suppress magnetic noise generation. Postsetting of AP biased ferromagnetic/antiferromagnetic multilayers is accomplished by magnetic field free annealing with in-situ magnetic domain control. Overcoming the shape and demagnetization effects, stable single magnetic domain configurations in the magnetic sensing layers of magnetic multilayers are formed. Magnetic noise contributions are undetectable in this case. The achieved single domain field stability opens the path to ultralow noise magnetoelectric sensor applications. The demonstrated AP biasing scheme is applicable to other magnetic layer-based field sensing devices.

Featured Image

Why is it important?

Provides a technique to develop a magnetic multilayer that allows development of ultralow noise magnetoelectric sensors and other magnetic layer-based field sensing devices.