Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced spin-flip scattering at the surface of copper in lateral spin
  valves   We performed non-local electrical measurements of a series of Py/Cu lateral
spin valve devices with different Cu thicknesses. We show that both the spin
diffusion length of Cu and the apparent spin polarization of Py increase with
Cu thickness. By fitting the results to a modified spin-diffusion model, we
show that the spin diffusion length of Cu is dominated by spin-flip scattering
at the surface. In addition, the dependence of spin polarization of Py on Cu
thickness is due to a strong spin-flip scattering at the Py/Cu interface.

19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph