Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic-Field-Controlled Twin Boundaries Motion and Giant
  Magneto-Mechanical Effects in Ni-Mn-Ga Shape Memory Alloy   Recently, several research groups have reported on the observation of
super-large more than 5% magneto-strain effect in some non-stoichiometric
Ni-Mn-Ga alloys close to 5.78% value expected from the tetragonality aspect
ratio of the martensite crystal lattice. New Ni-Mn-Ga alloys showing giant
magneto-strain effect display simultaneously few interesting physical effects
and new behavior for some magnetic and mechanical properties which is very
different from that earlier observed in Ni-Mn-Ga showing lower magneto-strain
effect. This report represents some new experimental results and the
quantitative model describing large magneto-strain effect and main mechanical
and magnetic properties observed in several ferromagnetic shape-memory alloys.
The model application to giant magneto-strain effect recently found in some
non-stoichiometric Ni-Mn-Ga alloys is discussed.

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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc