Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of magnetic small-angle neutron scattering of two-phase
  ferromagnets   Based on micromagnetic theory we have derived analytical expressions for the
magnetic small-angle neutron scattering (SANS) cross section of a two-phase
particle-matrix-type ferromagnet. The approach---valid close to magnetic
saturation---provides access to several features of the spin structure such as
perturbing magnetic anisotropy and magnetostatic fields. Depending on the
applied magnetic field and on the magnitude $H_p$ of the magnetic anisotropy
field relative to the magnitude $\Delta M$ of the jump in the longitudinal
magnetization at the particle-matrix interface, we observe a variety of angular
anisotropies in the magnetic SANS cross section. In particular, the model
explains the "clover-leaf"-shaped angular anisotropy which was previously
observed for several nanostructured magnetic materials, and it provides access
to the magnetic interaction parameters such as the average exchange-stiffness
constant. It is also shown that the ratio $H_p / \Delta M$ decisively
determines the asymptotic power-law exponent and the range of spin-misalignment
correlations.

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The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
29
The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th