Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-lattice Coupling and Magneto-dielectricity in Ca3Mn2O7 Layered
  Perovskite   Dielectric study on Ca3Mn2O7 features relaxor-like segmented dynamics below
the antiferromagnetic ordering. Dipolar relaxations of different origin are
spectrally resolved exhibiting distinct H-field alterations. This identifies
their allegiance to different magnetic sub-phases and establishes dual coupling
of electrical, magnetic, and structural degrees of freedom. Further, strong
spin-lattice coupling has been affirmed with Raman spectroscopy across the
magnetic ordering. Short-range electrical correlations collaterally cause
measurable harmonic dielectric response in the system. The
\c{hi}_3^e-susceptibility signal yields genuine harmonic magneto-dielectricity,
consistent with but exhibiting two orders of magnitude larger H-field effect,
vis-\`a-vis that obtained in the fundamental dielectric constant {\epsilon}'.

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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: econ