Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Pt magnetic polarization on Y3Fe5O12 and magnetotransport
  characteristics"   In a recent Letter [Y.M. Lu et al., Phys. Rev. Lett. 110, 147207 (2013)], Lu
et al. reported on "ferromagneticlike transport properties" of thin films of
Pt, deposited ex situ via sputtering on the ferrimagnetic insulator Y3Fe5O12.
The authors found a magnetoresistance in Pt displaying a hysteresis
corresponding to the coercive field of Y3Fe5O12, consistent with the findings
of other groups. While the latter interpreted their data in terms of the
recently proposed spin-Hall magnetoresistance, Lu et al. attributed their
observation to a magnetic proximity effect. To support this interpretation,
they measured the X-ray magnetic circular dichroism (XMCD) at the Pt L2,3 edges
from a Pt/Y3Fe5O12 sample with a Pt thickness of 1.5 nm and derived an average
induced magnetic moment of 0.054 Bohr magnetons per Pt atom. This is
contradictory to the results of our previous comprehensive XMCD study of three
different Pt/Y3Fe5O12 samples with Pt thicknesses of 3, 7, and 10 nm from which
we identified an upper limit of (0.003 +/- 0.001) Bohr magnetons per Pt
[Gepr\"ags et al., Appl. Phys. Lett. 101, 262407 (2012), arXiv:1211.0916].

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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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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: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn