Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of the vortex core on the magnetic field in hard superconductors   Using approximate analytical and new numerical solutions of the conventional
Ginzburg-Landau equations we calculate the small angle neutron scattering
cross-section and the variance of the field distribution as measured by
muon-spin rotation for superconductors with large Ginzburg-Landau parameter
$\kappa$. Our results prove that a proper account of the finite size of the
vortex core is important, even at relatively low fields. This finding provides
a natural explanation for the recently observed field dependence of the CeRu_2
form factor and of the YBa_2Cu_3O_{6.95} penetration depth.

35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
1
The categories of this paper are: cs
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
2
The categories of this paper are: math