Co/Au multilayers with graded magnetic anisotropy for magnetic field sensing | Zendy

M. Matczak | Zendy; Piotr Kuświk | Zendy; B. Szymański | Zendy; M. Urbaniak | Zendy; M. Schmidt | Zendy; J. Aleksiejew | Zendy; F. Stobiecki | Zendy; Arno Ehresmann | Zendy

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

Author(s) -

M. Matczak,

Piotr Kuświk,

B. Szymański,

M. Urbaniak,

M. Schmidt,

J. Aleksiejew,

F. Stobiecki,

Arno Ehresmann

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4704176

Subject(s) - condensed matter physics , magnetoresistance , magnetic anisotropy , magnetization , coercivity , materials science , magnetic domain , perpendicular , anisotropy , magnetic field , single domain , domain wall (magnetism) , nuclear magnetic resonance , physics , optics , geometry , quantum mechanics , mathematics

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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