Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductors in realistic geometries: Geometric edge barrier versus
  pinning   The magnetic response of type-II superconductors can be irreversible due to
two different reasons: vortex pinning and barriers for flux penetration. Even
without bulk pinning and in absence of a microscopic Bean-Lingston surface
barrier for vortex penetration, superconductors of nonellipsoidal shape can
exhibit a large geometric barrier for flux penetration.
  This edge barrier and the resulting irreversible magnetization loops and
flux-density profiles are computed from continuum electrodynamics for
superconductor strips and disks with constant thickness, both without and with
bulk pinning. Expressions for the field of first flux entry H_en and for the
reversibility field H_rev above which the pin-free magnetization becomes
reversible are given. Both fields are proportional to the lower critical field
H_c1 and else depend only on the specimen shape. These realistic results are
compared with the reversible magnetic behavior of ideal superconductor
ellipsoids.

17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph