Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brillouin Light Scattering Spectra as local Temperature Sensors for
  Thermal Magnons and Acoustic Phonons   We demonstrate the use of the micro-Brillouin light scattering (micro-BLS)
technique as a local temperature sensor for magnons in a Permalloy thin film
and phonons in the glass substrate. A systematic shift in the frequencies of
two thermally excited perpendicular standing spin wave modes as the film is
uniformly heated allows us to achieve a temperature resolution better than 2.5
K. We demonstrate that the micro-BLS spectra can be used to measure the local
temperatures of phonons and magnons across a thermal gradient. Such local
temperature sensors are useful for investigating spin caloritronic and thermal
transport phenomena in general.

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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys