Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic and orbital ordering in the spinel MnV2O4   Neutron inelastic scattering and diffraction techniques have been used to
study the MnV2O4 spinel system. Our measurements show the existence of two
transitions to long-range ordered ferrimagnetic states; the first collinear and
the second noncollinear. The lower temperature transition, characterized by
development of antiferromagnetic components in the basal plane, is accompanied
by a tetragonal distortion and the appearance of a gap in the magnetic
excitation spectrum. The low-temperature noncollinear magnetic structure has
been definitively resolved. Taken together, the crystal and magnetic structures
indicate a staggered ordering of the V d orbitals. The anisotropy gap is a
consequence of unquenched V orbital angular momentum.

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The categories of this paper are: atom-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
2
The categories of this paper are: math
16
The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
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The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga