Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetostructural martensitic transformations with large volume changes
  and magneto-strains in all-d-metal Heusler alloys   The all-d-metal Mn2-based Heusler ferromagnetic shape memory alloys
Mn50Ni40-xCoxTi10 (x = 8 and 9.5) are realized. With a generic comparison
between d-metal Ti and main-group elements in lowering the transformation
temperature, the magnetostructural martensitic transformations are established
by further introducing Co to produce local ferromagnetic Mn-Co-Mn
configurations. A 5-fold modulation and (3, -2) stacking of [00 10] of
martensite are determined by XRD and HRTEM analysis. Based on the
transformation, a large magneto-strain of 6900 ppm and a large volume change of
-2.54% are observed in polycrystalline samples, which makes the all-d-metal
magnetic martensitic alloys of interest for magnetic/pressure multi-field
driven applications.

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The categories of this paper are: cs
29
The categories of this paper are: funct-an
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The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph