Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The 2014 Magnetism Roadmap   Magnetism is a very fascinating and dynamic field. Especially in the last 30
years it has experienced many major advances in the full range from novel
fundamental phenomena to new products. Applications such as hard disk drives
and magnetic sensors are part of our daily life, and new applications, such as
in non-volatile computer random access memory, are expected to surface shortly.
Thus it is timely for describing the current status, and current and future
challenges in the form of a Roadmap article. This 2014 Magnetism Roadmap
provides a view on several selected, currently very active innovative
developments. It consists of 12 sections, each written by an expert in the
field and addressing a specific subject, with strong emphasize on future
potential. This Roadmap cannot cover the entire field. We have selected several
highly relevant areas without attempting to provide a full review - a future
update will have room for more topics. The scope covers mostly nano-magnetic
phenomena and applications, where surfaces and interfaces provide additional
functionality. New developments in fundamental topics such as interacting
nano-elements, novel magnon-based spintronics concepts, spin-orbit torques and
spin-caloric phenomena are addressed. New materials, such as organic magnetic
materials and permanent magnets are covered. New applications are presented
such as nano-magnetic logic, non-local and domain-wall based devices,
heat-assisted magnetic recording, magnetic random access memory, and
applications in biotechnology. May the Roadmap serve as a guideline for future
emerging research directions in modern magnetism.

2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex