Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of magnetic spin and orbital Hall and Nernst effects in bulk
  ferromagnets   The magnetic spin Hall effect (MSHE) is an anomalous charge-to-spin
conversion phenomenon which occurs in ferromagnetic materials. In contrast to
the conventional spin Hall effect (SHE), being a time-reversal even effect, the
magnetic counterpart is time-reversal odd. In this work, we use ab initio
calculations to investigate the MSHE for the bulk ferromagnets Fe, Co, and Ni.
The magnitudes of the MSHE of Fe and Co are comparable to those of the SHE, but
the MSHE is strongly dependent on the electron lifetime and the MSHE and SHE
can moreover have opposite signs. For Ni the MSHE is smaller than the SHE, but
in general, the MSHE cannot be ignored for spin-orbit torques. Considering a
charge current we analyze how both the MSHE and SHE contribute to a total Hall
angle. We extend our analysis of the MSHE to its orbital counterpart, that is,
the magnetic orbital Hall effect (MOHE), for which we show that the MOHE is in
general smaller than the orbital Hall effect (OHE). We compute furthermore the
thermal analogs, i.e., the spin and orbital Nernst effects, and their magnetic
counterparts. Here our calculations show that the magnetic spin and orbital
Nernst effects of Ni are substantially larger than those of Fe and Co.

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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga