Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Appearance of an inhomogeneous superconducting state in
  La{0.67}Sr{0.33}MnO{3}-YBa{2}Cu{3}O{7}-La{0.67}Sr{0.33}MnO{3} trilayers   An experimental study of proximity effect in La{0.67}Sr{0.33}MnO3 - YBa2Cu3O7
- La{0.67}Sr{0.33}MnO3 trilayers is reported. Transport measurements on these
samples show clear oscillations in critical current (I_c) as the thickness of
La{0.67}Sr{0.33}MnO3 layers (d_F) is scanned from ~ 50 A to ~ 1100 A. In the
light of existing theories of ferromagnet-superconductor (FM-SC)
heterostructures, this observation suggests a long range proximity effect in
the manganite, modulated by it's weak exchange energy (~ 2 meV). The observed
modulation of the magnetic coupling between the ferromagnetic LSMO layers as a
function of d_F, also suggests an oscillatory behavior of the SC order
parameter near the FM-SC interface.

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The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th