Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Grain growth in Pt microheaters subjected to high current density under
  constant power   When $50$ nm thick Pt microheaters of lateral dimensions $1\times10$
$\mu$m$^2$ are subjected to high electric power their resistance $R$ rises, as
expected. Following an initial rise however there is a gradual decrement in $R$
while constant electric power dissipation is maintained. We find that this
lowering in $R$ is accompanied by grain growth in the polycrystalline thin Pt
film of our heaters. This is confirmed by XRD measurements and SEM imaging.
Similar growth in grain size is observed in thin Pt films that are
oven-annealed at high temperatures. Thus we argue that maintaining high power
dissipation in a microheater has the same effect on its material structure as
post-annealing. We observe the in-plane grain size of a $50$ nm thick as-grown
Pt film/heater to be $D_\parallel=15$ nm. When post-annealed at a temperature
of $T=600^\circ$C for 30 min, $D_\parallel=30$ nm, compared with when electric
current is run through a heater we estimate the mean crystalline length to be
$D_\parallel=35$ nm.

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The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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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: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: funct-an