Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Table-top Measurement of Local Magnetization Dynamics Using Picosecond
  Thermal Gradients: Toward Nanoscale Magnetic Imaging   Recent advances in nanoscale magnetism have demonstrated the potential for
spin-based technology including magnetic random access memory, nanoscale
microwave sources, and ultra-low power signal transfer. Future engineering
advances and new scientific discoveries will be enabled by research tools
capable of examining local magnetization dynamics at length and time scales
fundamental to spatiotemporal variations in magnetic systems - typically 10 -
200 nm and 5 - 50 ps. A key problem is that current table-top magnetic
microscopy cannot access both of these scales simultaneously. In this letter,
we introduce a spatiotemporal magnetic microscopy that uses
magneto-thermoelectric interactions to measure local magnetization via the
time-resolved anomalous Nernst effect (TRANE). By generating a short-lived,
local thermal gradient, the magnetic moment is transduced into an electrical
signal. Experimentally, we show that TRANE microscopy has time resolution below
30 ps and spatial resolution limited by the thermal excitation area.
Furthermore, we present numerical simulations to show that the thermal spot
size sets the limits of the spatial resolution, even at 50 nm. The thermal
effects used for TRANE microscopy have no fundamental limit on their spatial
resolution, therefore a future TRANE microscope employing a scanning plasmon
antenna could enable measurements of nanoscale magnetic dynamics.

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The categories of this paper are: acc-phys
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org