Journal article
Domain structure and magnetoresistance of NiFe/Au/Co/Au multilayers with perpendicular anisotropy
Publication Details
Authors: | Urbaniak, M.; Stobiecki, F.; Engel, D.; Szymanski, B.; Ehresmann, A.; Kim, J. |
Publication year: | 2006 |
Journal: | Physica Status Solidi (C) - Current Topics in Solid State Physics |
Pages range : | 57-60 |
Volume number: | 3 |
ISSN: | 1610-1634 |
DOI-Link der Erstveröffentlichung: |
URN / URL: |
Abstract
The magnetic properties of sputtered [Ni80Fe20(2 nm)/Au(tAu)/Co(tCo)/Au(tAu)]15 multilayers with tAu = 1.5-3 nm and tCo =0.6-1.5 nm were investigated with magnetic force microscope. The Ni80Fe20 layers possessed in-plane magnetic anisotropy while the sandwiching of Co layers between Au layers ensured their perpendicular anisotropy through the influence of surface anisotropy. It led to the formation of a maze configuration of stripe domains. The stripe domains period λ strongly depends on tCo changing from 0.9 to 0.3 µm when tCo changes from 0.6 to 0.8 nm. Period λ increases with Au layers thickness, too. The values of stray fields originating from Co layers which act on Ni80Fe20 layers, in the range of 100 kA/m, estimated from magnetoresistive dependencies are in qualitative agreement with those evaluated from the model of infinitely long stripe domains with domain widths taken from MFM measurements.
The magnetic properties of sputtered [Ni80Fe20(2 nm)/Au(tAu)/Co(tCo)/Au(tAu)]15 multilayers with tAu = 1.5-3 nm and tCo =0.6-1.5 nm were investigated with magnetic force microscope. The Ni80Fe20 layers possessed in-plane magnetic anisotropy while the sandwiching of Co layers between Au layers ensured their perpendicular anisotropy through the influence of surface anisotropy. It led to the formation of a maze configuration of stripe domains. The stripe domains period λ strongly depends on tCo changing from 0.9 to 0.3 µm when tCo changes from 0.6 to 0.8 nm. Period λ increases with Au layers thickness, too. The values of stray fields originating from Co layers which act on Ni80Fe20 layers, in the range of 100 kA/m, estimated from magnetoresistive dependencies are in qualitative agreement with those evaluated from the model of infinitely long stripe domains with domain widths taken from MFM measurements.
