Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-Ice and Other Frustrated Magnets on the Pyrochlore Lattice   The recent identification of the dysprosium titanate compound $Dy_2 Ti_2 O_7$
as a ``Spin-Ice'', i.e. the spin analog of regular entropic ice of Pauling, has
created considerable excitement. The ability to manipulate spins using magnetic
fields gives a unique advantage over regular ice in these systems, and has been
used to study the recovery of entropy. Predicted magnetization plateaus have
been observed, testing the underlying model consisting of a competition between
short ranged super exchange, and long ranged dipolar interactions between
spins. I discuss other compounds that are possibly spin ice like: $Ho_2 Ti_2
O_7$, and the two stannates $Ho_2 Sn_2 O_7$, $Dy_2 Sn_2 O_7$.

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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: econ