Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum spin coherence in halogen-modified Cr$_7$Ni molecular
  nanomagnets   Among the factors determining the quantum coherence of the spin in molecular
magnets is the presence and the nature of nuclear spins in the molecule. We
have explored modifying the nuclear spin environment in Cr$_7$Ni-based
molecular nanomagnets by replacing hydrogen atoms with deuterium or the halogen
atoms, fluorine or chlorine. We find that the spin coherence, studied at low
temperatures by pulsed electron spin resonance, is modified by a range of
factors, including nuclear spin and magnetic moment, changes in dynamics owing
to nuclear mass, and molecular morphology changes.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
21
The categories of this paper are: adap-org