Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Few-nm tracking of magnetic vortex orbits and their decay with ultrafast
  Lorentz microscopy   Transmission electron microscopy is one of the most powerful techniques to
characterize nanoscale magnetic structures. In light of the importance of fast
control schemes of magnetic states, time-resolved microscopy techniques are
highly sought after in fundamental and applied research. Here, we implement
time-resolved Lorentz imaging in combination with synchronous radio-frequency
excitation using an ultrafast transmission electron microscope. As a model
system, we examine the current-driven gyration of a vortex core in a 2
$\mathrm{\mu}$m-sized magnetic nanoisland. We record the trajectory of the
vortex core for continuous-wave excitation, achieving a localization precision
of $\pm$2nm with few-minute integration times. Furthermore, by tracking the
core position after rapidly switching off the current, we find a temporal
hardening of the free oscillation frequency and an increasing orbital decay
rate attributed to local disorder in the vortex potential.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph