Journal article
Co/Au multilayers with graded magnetic anisotropy for magnetic field sensing



Publication Details
Authors:
Matczak, M.; Kuswik, P.; Szymanski, B.; Urbaniak, M.; Schmidt, M.; Aleksiejew, J.; Stobiecki, F.; Ehresmann, A.
Publication year:
2012
Journal:
Applied Physics Letters
Pages range:
162402
Journal acronym:
Appl. Phys. Lett.
Volume number:
100
ISSN:
0003-6951

Abstract
A concept of a magnetoresistive sensor for magnetic fields based on a Au/Co-wedge/Au/Co/Au multilayer is proposed. The wedged Co layer is characterized by a laterally changing coercivity resulting from a gradient of perpendicular magnetic anisotropy. Its magnetization reversal in a perpendicular magnetic field takes place by movement of a single domain wall in the direction parallel to the anisotropy gradient. The magnetization reversal of the multilayer has been investigated by magnetooptical and magnetoresistive measurements. The resistance of the proposed film system correlates well with the position of the domain wall and thus it can be used to sense magnetic fields.


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Last updated on 2019-25-07 at 17:04