Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetization Reversal Across Multiple Serial Barriers in a Single
  Fe$_3$O$_4$ Nanoparticle   Depinning of nanoscale magnetic textures, such as domain walls, vortices and
skyrmions, is of paramount importance for magnetic storage and information
processing. We measure time-resolved magnetic switching statistics of an
individual, non-single-domain Fe$_3$O$_4$ nanoparticle using a micrometer-scale
superconducting quantum interference device. Surprisingly, a strong narrowing
of the waiting-time distributions before reaching the final state is observed
as compared to the exponential distribution expected for a single barrier. The
magnetization reversal across the nanostructure is thus shown to result from
multiple serial barriers in the minimum energy pathway.

9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat