Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1998-12-09
Journal of Applied Physics 85, 5243 (1999)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
7 pages, 8 figures, to appear in Journal of Applied Physics 1999
Scientific paper
10.1063/1.369956
We review our recent magnetotransport and micromagnetic studies of lithographically defined epitaxial thin film structures of bcc Fe and hcp Co with stripe domains. Micromagnetic structure and resistivity anisotropy are shown to be the predominant sources of low field magnetoresistance (MR) in these microstructures, with domain wall (DW) effects smaller but observable (DW-MR $\lesssim 1 %$). In Fe, at low temperature, in a regime in which fields have a significant effect on electron trajectories, a novel negative DW contribution to the resistivity is observed. In hcp Co microstructures, temperature dependent transport measurements for current perpendicular and parallel to walls show that any additional resistivity due to DW scattering is very small.
Kent Andrew D.
Parkin Stuart S. P.
Rudiger Ulrich
Thomas Luc
Yu Jun
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