Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exchange coupling in synthetic anion-engineered chromia heterostructures   Control of magnetic states by external factors has garnered a mainstream
status in spintronic research for designing low power consumption and
fast-response information storage and processing devices. Previously,
magnetic-cation substitution is the conventional means to induce ferromagnetism
in an intrinsic antiferromagnet. Theoretically, the anion-doping is proposed to
be another effect means to change magnetic ground states. Here we demonstrate
the synthesis of high-quality single-phase chromium oxynitride thin films using
in-situ nitrogen doping. Unlike antiferromagnetic monoanionic chromium oxide
and nitride phases, chromium oxynitride exhibits a robust ferromagnetic and
insulating state, as demonstrated by the combination of multiple magnetization
probes and theoretical calculations. With increasing the nitrogen content, the
crystal structure of chromium oxynitride transits from trigonal (R3c) to
tetragonal (4mm) phase and its saturation magnetization reduces significantly.
Furthermore, we achieve a large and controllable exchange bias field in the
chromia heterostructures by synthetic anion engineering. This work reflects the
anion engineering in functional oxides towards the potential applications in
giant magnetoresistance and tunnelling junctions of modern magnetic sensors and
read heads.

37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int