Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Indication for macroscopic quantum tunneling below 10 K in
  nanostructures of SrRuO3   We study magnetization reversal of nanostructures of the itinerant
ferromagnet SrRuO3 (Tc~150 K). We find that down to 10 K the magnetization
reversal is dominated by thermal activation. From 2 - 10 K, the magnetization
reversal becomes independent of temperature, raising the possibility for
reversal dominated by macroscopic quantum tunneling (MQT). A 10 K crossover to
MQT is consistent with the extremely large anisotropy field (~7 T) of SrRuO3.

26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom