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Direct observation of domain wall scattering in patterned Ni80Fe20 and Ni nanowires by current-voltage measurements

Lepadatu, S. and Xu, Y.B. (2004) Direct observation of domain wall scattering in patterned Ni80Fe20 and Ni nanowires by current-voltage measurements. Physical Review Letters, 92 (12). pp. 1272011-1272014. ISSN 0031-9007

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Abstract

We present measurements of domain wall resistivity, pinned by nanoconstrictions in single layer ferromagnetic wires of Ni80Fe20 and Ni. Unpinning domain walls from the constriction by current-induced switching allows for an unambiguous measurement of their resistivity changes, namely, 1.7% in Ni80Fe20 and 1.82% in Ni and both positive, which supports the theory of spin-dependent impurity scattering. By deriving an empirical relation for the various constriction widths, the large percentage changes of resistivity in ballistic nanocontacts are reproduced, showing a correlation between domain wall magnetoresistance and ballistic magnetoresistance.

Item Type: Article
Academic Units: The University of York > Physics (York)
Depositing User: York RAE Import
Date Deposited: 25 Feb 2009 15:26
Last Modified: 25 Feb 2009 15:26
Published Version: http://dx.doi.org/10.1103/PhysRevLett.92.127201
Status: Published
Publisher: American Physical Society
Identification Number: 10.1103/PhysRevLett.92.127201
URI: http://eprints.whiterose.ac.uk/id/eprint/7210

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