Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Direct Correlation between 1/f-magneto-noise and magnetoresistance in
  La0.7Sr0.3MnO3 and (La0.5Pr0.2)Ba0.3MnO3 manganites   Temperature- and magnetic field-dependent electrical noise and electrical
resistivity measurements were carried out on epitaxial thin films of a large
bandwidth La0.7Sr0.3MnO3 and a disordered intermediate bandwidth
(La0.5Pr0.2)Ba0.3MnO3 manganite system. The power spectraldensity was dominated
by 1/f-noise. This 1/f-noise was observed to follow the overall temperature
dependence of the resistivity. Moreover, in these compounds the magneto-noise
effect was found to be of nearly the same magnitude as the magnetoresistance.
This direct correlation between magneto-noise and magnetoresistance suggests
that the enhanced 1/f-noise has its origin in intrinsic charge-carrier density
fluctuations.

19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex