Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant saturation magnetization effect in epitaxial Fe16N2 thin films
  grown on MgO (001) substrate   Whether {\alpha}double prime-Fe16N2 possesses a giant saturation
magnetization (Ms) has been a daunting problem among magnetic researchers for
almost 40 years, mainly due to the unshakable faith of famous Slater-Pauling
(SP) curve and poor consistency on evaluating its Ms. Here we demonstrate that,
using epitaxy and mis-fit strain imposed by an underlying substrate, the
in-plane lattice constant of Fe16N2 thin films can be fine tuned to create
favorable conditions for exceptionally large saturation magnetization. Combined
study using polarized neutron reflectometry and X-ray diffraction shows that
with increasing strain at the interface the Ms of these film can be changed
over a broad range, from ~2.1T (non-high Ms) up to ~3.1T (high Ms). We suggest
that the equilibrium in-plane lattice constant of Fe16N2 sits in the vicinity
of the spin crossover point, in which a transition between low spin to high
spin configuration of Fe sites can be realized with sensitive adjustment of
crystal structure.

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The categories of this paper are: econ
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The categories of this paper are: chem-ph
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph