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
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.
|Institution:||The University of York|
|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|
|Publisher:||American Physical Society|