Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of magnetic switching of ferroelectricity in spiral magnets   We propose a microscopic theory for magnetic switching of electric
polarization (P) in the spin-spiral multiferroics by taking TbMnO3 and DyMnO3
as examples. We reproduce their phase diagrams under a magnetic field H_ex by
Monte-Carlo simulation of an accurate spin model and reveal that competition
among the Dzyaloshinskii-Moriya interaction, spin anisotropy, and spin exchange
is controlled by the applied H_ex, resulting in magnetic transitions
accompanied by reorientation or vanishing of P. We also discuss the relevance
of the proposed mechanisms to many other multiferroics such as LiCu2O2, MnWO4,
and Ni3V2O4

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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: physics
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The categories of this paper are: q-fin