Negative Domain Wall Contribution to the Resistivity of Microfabricated Fe Wires

Details Negative Domain Wall Contribution to the Resistivity of Microfabricated Fe Wires Negative Domain Wall Contribution to the Resistivity of Microfabricated Fe Wires

1998-03-09

arxiv.org/abs/cond-mat/9803102v1

Physical Review Letters, 80, 5639 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 postscript figures and 1 jpg image (Fig. 1)

Scientific paper

10.1103/PhysRevLett.80.5639

The effect of domain walls on electron transport has been investigated in microfabricated Fe wires (0.65 to 20 $\mu m$ linewidths) with controlled stripe domains. Magnetoresistance (MR) measurements as a function of domain wall density, temperature and the angle of the applied field are used to determine the low field MR contributions due to conventional sources in ferromagnetic materials and that due to the erasure of domain walls. A negative domain wall contribution to the resistivity is found. This result is discussed in light of a recent theoretical study of the effect of domain walls on quantum transport.

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