Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical breakdown of the Ising spin-glass order under a magnetic field   The dynamical magnetic properties of an Ising spin glass
Fe$_{0.55}$Mn$_{0.45}$TiO$_3$ are studied under various magnetic fields. Having
determined the temperature and static field dependent relaxation time
$\tau(T;H)$ from ac magnetization measurements under a dc bias field by a
general method, we first demonstrate that these data provide evidence for a
spin-glass (SG) phase transition only in zero field. We next argue that the
data $\tau(T;H)$ of finite $H$ can be well interpreted by the droplet theory
which predicts the absence of a SG phase transition in finite fields.

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The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga