Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Negative Domain Wall Contribution to the Resistivity of Microfabricated
  Fe Wires   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.

30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph