Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Design of magnetic spirals in layered perovskites: extending the
  stability range far beyond room temperature   In insulating materials with ordered magnetic spiral phases, ferroelectricity
can emerge due to the breaking of inversion symmetry. This property is of both
fundamental and practical interest, in particular with a view to exploiting it
in low-power electronic devices. Advances towards technological applications
have been hindered, however, by the relatively low ordering temperatures
$T_\mathrm{spiral}$ of most magnetic spiral phases, which rarely exceed 100 K.
We have recently established that the ordering temperature of a magnetic spiral
can be increased up to 310 K by the introduction of chemical disorder. Here we
explore the design space opened up by this novel mechanism by combining it with
a targeted lattice control of some magnetic interactions. In Cu-Fe layered
perovskites we obtain $T_\mathrm{spiral}$ values close to 400 K, comfortably
far from room temperature and almost 100 K higher than using chemical disorder
alone. Moreover, we reveal a linear, universal relationship between the
spiral's wave vector and the onset temperature of the spiral phase. This linear
law ends at a paramagnetic-collinear-spiral triple point, which defines the
highest spiral ordering temperature that can be achieved in this class of
materials. Based on these findings, we propose a general set of rules for
designing magnetic spirals in layered perovskites using external pressure,
chemical substitutions and/or epitaxial strain, which should guide future
efforts to engineer magnetic spiral phases with ordering temperatures suitable
for technological applications.

9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
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
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th